Publication

list of publications

This research monograph provides an accessible introduction to the variational formulation of Lagrangian and Hamiltonian mechanics, with a novel emphasis on global descriptions of the dynamics, which is a significant conceptual departure from more traditional approaches based on the use of local coordinates on the configuration manifold. In particular, we introduce a general methodology for obtaining globally valid equations of motion on configuration manifolds that are Lie groups, homogeneous spaces, and embedded manifolds, thereby avoiding the difficulties associated with coordinate singularities.

Books

  1. T. Lee, M. Leok, N. H. McClamroch, "Global Formulation of Lagrangian and Hamiltonian Dynamics on Manifolds", Springer, 2018, doi:10.1007/978-3-319-56953-6

Journal Articles

  1. K. Simon, M. Wickramasuriya, T. Lee, M. Snyder, "LiDAR-based UAV Pose Estimation in Ocean Environment with Deep Point Transformer Network", AIAA Journal of Guidance, Control, and Dynamics, 2025, submitted
  2. T. C, M. Wickramasuriya, S. Bonnabel, A. Barrau, T. Lee, "Invariant Kalman Filter for Relative Dynamics", IEEE Transactions on Automatic Control, 2025, submitted
  3. T. Lee, G. Chirikjian, "Geometric Interpretation of Brownian Motion on Riemannian Manifolds", IEEE Transactions on Automatic Control, 2025, submitted
  4. B. Yu, T. Lee, "Equivariant Reinforcement Learning Frameworks for Quadrotor Low-Level Control", IEEE Transactions on Control Systems Technology, 2025, doi:10.1109/TCST.2025.3599971, accepted
  5. M. Wickramasuriya, T. Lee, M. Snyder, "Deep Transformer Network for Monocular Pose Estimation of Shipborne UAV", AIAA Journal of Guidance, Control, and Dynamics, 2025, doi:10.2514/1.G008588
  6. Z. Hou, L. Lin, T. Lee, M. Keidar, "Adaptive Cold Atmospheric Plasma: Demonstration with In-Vitro Cancer Treatment Experiments", Ameican Chemical Society (ACS) Omega, 10(40), pp. 46199--47713, 2025, doi:10.1021/acsomega.5c03325
  7. T. C, T. Lee, "Alternating learning for modular sensorimotor control of a flapping wing UAV", IEEE Transactions on Aerospace and Electronic Systems, 2025, submitted
  8. B. Yu, T. Lee, "Modular Reinforcement Learning for Quadrotor UAV with Decoupled Yaw Control", IEEE Robotics and Automation Letters, 10(1), pp. 572 - 579, 2025, doi:10.1109/LRA.2024.3511412
  9. K. Gamagedara, T. Lee, M. Snyder, "Delayed Kalman Filter for Vision-Based Autonomous Flight in Ocean Environments", Control Engineering Practice, 143, pp. 105791, 2024, doi:10.1016/j.conengprac.2023.105791
  10. C. Kang, M. Sridhar, R. Twigg, J. Pohly, T. Lee, H. Aono, "Power Benefits of High-Altitude Flapping Wing Flight at Monarch Butterfly Scale", Biomimetics, 8(4), pp. 352, 2023, doi:10.3390/biomimetics8040352
  11. T. C, T. Lee, "Constrained Imitation Learning for a Flapping Wing Unmanned Aerial Vehicle", IEEE Robotics and Automation Letters, 7(4), pp. 10534--10541, 2022, doi:10.1109/LRA.2022.3194682
  12. W. Wang, T. Lee, "Uncertainty Propagation for General Stochastic Hybrid Systems on Compact Lie Groups", SIAM Journal on Applied Dynamical Systems, 21(3), pp. 2215--2240, 2022, doi:10.1137/21M144147X
  13. Z. Hou, T. Lee, M. Keidar, "Reinforcement Learning with Safe Exploration for Adaptive Plasma Cancer Treatment", IEEE Transactions on Radiation and Plasma Medical Sciences, 6(4), pp. 482--492, 2022, doi:10.1109/TRPMS.2021.3094874
  14. W. Wang, K. Gamagedara, T. Lee, "On the Observability of Attitude with Single Direction Measurements", IEEE Transactions on Automatic Control, 67(9), pp. 4986--4993, 2022, doi:10.1109/TAC.2022.3179214
  15. K. Gamagedara, T. Lee, "Geometric Adaptive Controls of a Quadrotor UAV with Decoupled Attitude Dynamics", ASME Journal of Dynamic Systems, Measurement, and Control, 144(3), pp. 031002, 2022, doi:10.1115/1.4052714
  16. W. Wang, T. Lee, "Matrix Fisher--Gaussian Distribution on SO(3)xRn for Bayesian Attitude Estimation", IEEE Transactions on Automatic Control, 67(5), pp. 2175--2191, 2022, doi:10.1109/TAC.2021.3073323
  17. S. Kulumani, T. Lee, "Bayesian Shape Reconstruction and Optimal Guidance for Autonomous Landing on Asteroids", Journal of the Astronautical Sciences, 69, pp. 335--367, 2022, doi:10.1007/s40295-022-00310-6
  18. T. Lee, "Real harmonic analysis on the special orthogonal group", International Journal of Analysis and Applications, 20, 2022, doi:10.28924/2291-8639-20-2022-0
  19. L. Lin, D. Yan, T. Lee, M. Keidar, "Self-Adaptive Plasma Chemistry and Intelligent Plasma Medicine", Advanced Intelligent Systems, 2021, doi:10.1002/aisy.202100112
  20. K. Gamagedara, T. Lee, M. Snyder, "Quadrotor State Estimation with IMU and Delayed Real-time Kinematic GPS", IEEE Transactions on Aerospace and Electronic Systems, 57(5), pp. 2661 -- 2673, 2021, doi:10.1109/TAES.2021.3061795
  21. W. Wang, T. Lee, "Higher-Order Central Moments of Matrix Fisher Distribution on SO(3)", Statistics and Probability Letters, 169, 2021, doi:10.1016/j.spl.2020.108983
  22. T. C, M. Sridhar, C. Kang, T. Lee, "Effects of Abdomen Undulation in Energy Consumption and Stability for the Flights of Monarch Butterfly", Bioinspiration and Biomemetics, 16(4), pp. 046003, 2021, doi:10.1088/1748-3190/abce4d
  23. M. Sridhar, C. Kang, D. Landrum, H. Aono, S. Mathis, T. Lee, "Effects of flight altitude on the lift generation of monarch butterflies: from sea level to overwintering mountain", Bioinspiration and Biomemetics, 16, pp. 034002, 2021, doi:10.1088/1748-3190/abe108
  24. M. Bisheban, T. Lee, "Geometric Adaptive Control with Neural Networks for a Quadrotor UAV in Wind Fields", IEEE Transactions on Control Systems Technology, 29(4), pp. 1533--1548, 2021, doi:10.1109/TCST.2020.3006184
  25. L. Lin, Z. Hou, X. Yao, Y. Liu, J. Sirigiri, T. Lee, M. Keidar, "Introducing adaptive cold atmospheric plasma: The perspective of adaptive cold plasma cancer treatments based on real-time electrochemical impedance spectroscopy", Physics of Plasma, 27(6), pp. 063501, 2020, doi:10.1063/5.0003528
  26. W. Wang, T. Lee, "Spectral Bayesian Estimation for General Stochastic Hybrid Systems", Automatica, 117, 2020, doi:10.1016/j.automatica.2020.108989
  27. E. Kaufman, K. Takami, Z. Ai, T. Lee, "Bayesian Mapping-Based Autonomous Exploration and Patrol of 3D Structured Indoor Environments with Multiple Flying Robots", Journal of Intelligent and Robotic Systems, 98, pp. 403--419, 2020, doi:10.1007/s10846-019-01066-2
  28. Y. Lyu, L. Lin, E. Gjika, T. Lee, M. Keidar, "Mathematical Modeling and Control for Cancer Treatment with Cold Atmospheric Plasma Jet", Journal of Physics D: Applied Physics, 52(18), pp. 185202, 2019, doi:10.1088/1361-6463/ab061d
  29. S. Kulumani, T. Lee, "Systematic Design of Optimal Low-Thrust Transfers for the Three-body Problem", Journal of the Astronautical Sciences, 66(1), pp. 1--31, 2019, doi:10.1007/s40295-018-00139-y
  30. T. Lee, D. Chang, Y. Eun, "Semi-Global Non-memoryless Attitude Controls on the Special Orthogonal Group", ASME Journal of Dynamic Systems, Measurement, and Control, 141(2), pp. 021005, 2018, doi:10.1115/1.4041447
  31. T. Lee, "Bayesian Attitude Estimation with the Matrix Fisher Distribution on SO(3)", IEEE Transactions on Automatic Control, 63(10), pp. 3377--3392, 2018, doi:10.1109/TAC.2018.2797162
  32. E. Kaufman, K. Takami, T. Lee, Z. Ai, "Autonomous Exploration with Exact Inverse Sensor Models", Journal of Intelligent and Robotic Systems, 92(3--4), pp. 435--452, 2018, doi:10.1007/s10846-017-0710-7
  33. T. Lee, "Geometric Control of Quadrotor UAVs Transporting a Cable-Suspended Rigid Body", IEEE Transactions on Control Systems Technology, 26(1), pp. 255--264, 2018, doi:10.1109/TCST.2017.2656060
  34. S. Kulumani, T. Lee, "Constrained geometric attitude control on SO(3)", International Journal of Control, Automation, and Systems, 15(6), pp. 2796--2809, 2017, doi:10.1007/s12555-016-0607-4
  35. F. Goodarzi, T. Lee, "Global Formulation of an Extended Kalman Filter on SE(3) for Geometric Control of a Quadrotor UAV", Journal of Intelligent and Robotic Systems, 88(2--4), pp. 395--416, 2017, doi:10.1007/s10846-017-0525-6
  36. M. Bisheban, T. Lee, "Computational Geometric System Identification for the Attitude Dynamics on SO(3)", International Journal of Control, Automation, and Systems, 15(6), pp. 2776--2785, 2017, doi:10.1007/s12555-016-0714-2
  37. T. Wu, B. Flewelling, F. Leve, T. Lee, "Spacecraft Attitude Formation Tracking Using Line-Of-Sight Measurements", AIAA Journal of Guidance, Control, and Dynamics, 40(10), pp. 2616--2629, 2017, doi:10.2514/1.G001727
  38. T. Lee, M. Leok, N. H. McClamroch, "Geometric formulations of Furuta pendulum control problems", Mathematics in engineering, science and aerospace, 7(1), pp. 69--81, 2016
  39. F. Goodarzi, T. Lee, "Stabilization of a rigid body payload with multiple cooperative quadrotors", ASME Journal of Dynamic Systems, Measurement, and Control, 138(12), pp. 121001--121001-17, 2016, doi:10.1115/1.4033945
  40. T. Wu, T. Lee, "Angular Velocity Observer for Velocity-Free Attitude Tracking Control on SO(3)", International Journal of Control, Automation, and Systems, 14(5), pp. 1289--1298, 2016, doi:10.1007/s12555-015-0163-3
  41. E. Kaufman, T. Lovell, T. Lee, "Minimum Uncertainty JPDA Filters and Coalescence Avoidance for Multiple Object Tracking", Journal of the Astronautical Sciences, 63(4), pp. 308--334, 2016, doi:10.1007/s40295-016-0092-2
  42. E. Kaufman, T. Lovell, T. Lee, "Nonlinear Observability for Relative Orbit Determination with Angles-Only Measurements", Journal of the Astronautical Sciences, 63(1), pp. 60--80, 2016, doi:10.1007/s40295-015-0082-9
  43. J. Dougherty, T. Lee, "Monocular Estimation of Ground Orientation for Autonomous Landing of a Quadrotor", AIAA Journal of Guidance, Control, and Dynamics, 39(6), pp. 1407--1416, 2016, doi:10.2514/1.G001229
  44. T. Lee, "Global Exponential Attitude Tracking Controls on SO(3)", IEEE Transactions on Automatic Control, 60(10), pp. 2837--2842, 2015, doi:10.1109/TAC.2015.2407452
  45. T. Lee, "Stochastic Optimal Motion Planning for the Attitude Kinematics of a Rigid Body with Non-Gaussian Uncertainties", ASME Journal of Dynamic Systems, Measurement, and Control, 137(3), pp. 034502, 2015, doi:10.1115/1.4027950
  46. F. Goodarzi, D. Lee, T. Lee, "Geometric Adaptive Tracking Control of a Quadrotor Unmanned Aerial Vehicle on SE(3)", ASME Journal of Dynamic Systems, Measurement, and Control, 137(9), 2015, doi:10.1115/1.4030419
  47. F. Goodarzi, D. Lee, T. Lee, "Geometric Control of a Quadrotor UAV Transporting a Payload Connected to a Quadrotor UAV via Flexible Cable", International Journal of Control, Automation, and Systems, 13(6), pp. 1--13, 2015, doi:10.1007/s12555-014-0304-0
  48. T. Lee, "Optimal control of partitioned hybrid systems via discrete-time Hamilton-Jacobi theory", Automatica, 50(8), pp. 2062--2069, 2014, doi:10.1016/j.automatica.2014.05.024
  49. T. Lee, M. Leok, N. H. McClamroch, "High-Fidelity Numerical Simulation of Complex Dynamics of Tethered Spacecraft", Acta Astronautica, 99(1), pp. 215--230, 2014, doi:10.1016/j.actaastro.2014.02.021
  50. T. Lee, "Robust adaptive tracking on SO(3) with an application to the attitude dynamics of a quadrotor UAV", IEEE Transactions on Control Systems Technology, 21(5), pp. 1924--1930, 2013, doi:10.1109/TCST.2012.2209887
  51. T. Lee, M. Leok, N. H. McClamroch, "Nonlinear robust tracking control of a quadrotor UAV on SE(3)", Asian Journal of Control, 15(2), pp. 391--408, 2013, doi:10.1002/asjc.567
  52. T. Lee, "Exponential stability of an attitude tracking control system on SO(3) for large-angle rotational maneuvers", Systems and Control Letters, 61(1), pp. 231--237, 2012, doi:10.1016/j.sysconle.2011.10.017
  53. T. Lee, M. Leok, N. H. McClamroch, "Computational dynamics of a 3D elastic string pendulum attached to a rigid body and an inertially fixed reel mechanism", Nonlinear Dynamics, 64(1-2), pp. 97--115, 2011, doi:10.1007/s11071-010-9849-5
  54. N. Chaturvedi, T. Lee, M. Leok, N. H. McClamroch, "Nonlinear Dynamics of the 3D pendulum", Journal of Nonlinear Science, 21(1), pp. 3--32, 2011, doi:10.1007/s00332-010-9078-6
  55. I. Kolmanovsky, T. Lee, A. Sanyal, J. Shen, "HarrisFest [Conference Reports]", IEEE Control Systems Magazine, pp. 81--83, 2010, doi:10.1109/MCS.2010.937816
  56. T. Lee, M. Leok, N. H. McClamroch, "Lagrangian Mechanics and Variational Integrators on Two-Spheres", International Journal for Numerical Methods in Engineering, 79(9), pp. 1147--1174, 2009, doi:10.1002/nme.2603
  57. A. Sanyal, T. Lee, M. Leok, N. H. McClamroch, "Global optimal attitude estimation using uncertainty ellipsoids", Systems and Control Letters, 57(3), pp. 236--245, 2008, doi:10.1016/j.sysconle.2007.08.014
  58. T. Lee, M. Leok, N. H. McClamroch, "Computational Geometric Optimal Control of Rigid Bodies", Communications in Information and Systems, special issue dedicated to R. W. Brockett, 8(4), pp. 445--472, 2008
  59. T. Lee, M. Leok, N. H. McClamroch, "Optimal attitude control of a rigid body using geometrically exact computations on SO(3)", Journal of Dynamical and Control Systems, 14(4), pp. 465--487, 2008, doi:10.1007/s10883-008-9047-7
  60. T. Lee, M. Leok, N. H. McClamroch, "Lie group variational integrators for the full body problem in orbital mechanics", Celestial Mechanics and Dynamical Astronomy, 98(2), pp. 121--144, 2007, doi:10.1007/s10569-007-9073-x
  61. T. Lee, M. Leok, N. H. McClamroch, "Lie group variational integrators for the full body problem", Computer Methods in Applied Mechanics and Engineering, 196, pp. 2907--2924, 2007, doi:10.1016/j.cma.2007.01.017
  62. T. Lee, Y. Kim, "Nonlinear Adaptive Flight Control Using Backstepping and Neural Networks Controller", AIAA Journal of Guidance, Control, and Dynamics, 24(4), pp. 675--682, 2001, doi:10.2514/2.4794
  63. T. Lee, Y. Kim, "Nonlinear Adaptive Flight Control Using Neural Networks and Backstepping", Journal of Control, Automation and Systems Engineering, 6(12), pp. 1070--1078, 2000
  64. J. Ahn, T. Lee, Y. Kim, "Real Time Formulation of Missile Trajectory Optimization Using a Parameter Optimization Technique", Journal of Korean Society for Aeronautical and Space Sciences, 27(4), pp. 94-103, 1999

Conference Proceedings

  1. T. Lee, G. Chirikjian, "Global Tensor Field Formulation of the Fokker--Planck Equation on Riemannian Manifolds", in Proceedings of the European Control Conference, 2025, submitted
  2. M. Wickramasuriya, B. Yu, T. Lee, M. Snyder, "Vision-in-the-loop Simulation for Deep Monocular Pose Estimation of UAV in Ocean Environment", in Proceedings of the International Conference on Unmanned Aircraft Systems, 2025
  3. Z. Zhang, H. Zhou, M. Imani, T. Lee, T. Lan, "Learning to Collaborate with Unknown Agents in the Absence of Reward", in Proceedings of the AAAI Conference on Artificial Intelligence, 2025
  4. T. C, T. Lee, "Mean Field Game and Control for Switching Hybrid Systems", in Proceedings of the IFAC Symposium on Nonlinear Control Systems, 2025, doi:10.1016/j.ifacol.2025.11.101
  5. T. C, M. Wickramasuriya, T. Lee, "Invariant Kalamn Filter for Relative Dynamics", in Proceedings of the IFAC Symposium on Nonlinear Control Systems, 2025, doi:10.1016/j.ifacol.2025.11.064
  6. T. C, W. Clark, T. Lee, "Uncertainty propagation of stochastic hybrid systems: a case study for types of jump", in Proceedings of the IFAC Symposium on Nonlinear Control Systems, 2025, doi:10.1016/j.ifacol.2025.11.048
  7. T. C, T. Lee, "Variational Integrators for Stochastic Mechanical Hybrid Systems", in Proceedings of the IFAC Workshop on Lagrangian and Hamiltonian Methods for Nonlinear Controls, pp. 149---154, 2024, doi:10.1016/j.ifacol.2024.08.272
  8. T. C, T. Lee, "Deep Neural Pose Estimation for a Flapping Wing Unmanned Aerial Vehicle with Visual-Inertial Sensor Fusion", in AIAA Scitech Forum, 2024, AIAA 2024-0948
  9. M. Wickramasuriya, T. Lee, M. Snyder, "Deep Monocular Relative 6D Pose Estimation for Ship-Based Autonomous UAV", in AIAA Scitech Forum, 2024, AIAA 2024-2877
  10. B. Yu, T. Lee, "Multi-Agent Reinforcement Learning for the Low-Level Control of a Quadrotor UAV", in Proceedings of the American Control Conference, pp. 1537--1542, 2024
  11. T. Lee, "G-Learning: Equivariant Indirect Optimal Control with Generating Function", in Proceedings of IEEE Conference on Decision and Control, pp. 2340-- 2345, 2023
  12. W. Wang, T. Lee, "INS-GNSS Navigation for Large Attitude Uncertanties with the Matrix Fisher--Gaussian Distribution", in Proceedings of the American Control Conference, pp. 4858--4863, 2023
  13. Z. Hou, T. Lee, M. Keidar, "Canonical Correlation Analysis For Real-Time Diagnostics Of Cancer Cell Viability With Impedance", in International Workshop On Plasma For Cancer Treatment, 2023
  14. M. Tarpley, J. Pohly, C. Kang, T. Lee, H. Aono, "Numerical Analysis of Flight Performance of Bioinspired Mars Flight Vehicles", in AIAA Scitech Forum, 2023, AIAA 2023-1219
  15. J. Pohly, C. Kang, T. C, T. Lee, H. Aono, "Climbing Flight of Monarch Butterflies via Wing and Abdomen Kinematic Modulation Using a High-Fidelity Numerical Framework", in AIAA Scitech Forum, 2023, AIAA 2023-1789
  16. B. Yu, T. Lee, "Equivariant reinforcement learning for quadrotor UAV", in Proceedings of the American Control Conference, pp. 2842--2847, 2023
  17. T. Morris, M. Sridhar, T. Clark, F. Schulze, C. Kang, D. Landrum, K. Roh, T. Lee, H. Aono, "Experimental Measurements of the Wing Deformation and Force Production of Real and Bioinspired Artificial Monarch Butterfly Wings", in Proceedings of the AIAA Scitech Forum, 2022, AIAA 2022-0308
  18. T. C, T. Lee, "Iterative Supervised Learning for Regression with Constraints", in International Conference on Ubiquitous Robots, 2022
  19. W. Wang, T. Lee, "Spacecraft Attitude and Gyro-Bias Estimation with a Single Magnetometer on SO(3)xRn", in Proceedings of the AIAA Scitech Forum, 2022, AIAA 2022-0616
  20. W. Wang, T. Lee, "Bingham--Gaussian Distribution on S2xRn for Unscented Attitude Estimation", in Proceedings of IEEE International Conference on Multisensor Fusion and Integration, 2021
  21. K. Gamagedara, T. Lee, M. Snyder, "Unscented Kalman filter for INS/GNSS Data Fusion with Time Delay", in Proceedings of AIAA Aviation Forum, 2021, AIAA 2021-2486
  22. M. Snyder, K. Gamagedara, T. Lee, J. Pritchard, "In Situ Detection and Analysis of Ship Air Wakes from a US Navy Research Vessel", in Proceedings of AIAA Aviation Forum, 2021, AIAA 2021-2485
  23. T. C, T. Lee, "Geometric Optimal Controls for Flapping Wing UAV on a Lie Group", in IFAC Workshop on Lagrangian and Hamiltonian Methods for Nonlinear Control, 2021
  24. T. Lee, M. Tao, M. Leok, "Variational Symplectic Accelerated Optimization on Lie Groups", in Proceedings of IEEE Conference on Decision and Control, pp. 233 -- 240, 2021
  25. M. Sridhar, J. Pohly, C. Kang, T. Lee, H. Aono, "Effects of Vein Structures on Fluid-structure Interaction of Flexible Flapping Wings at High Altitudes", in Proceedings of the AIAA Scitech Forum, 2021, AIAA 2021-0963
  26. T. Lee, "Stochastic Attitude Smoothing and Interpolation on SO(3) with Matrix Fisher Distributions", in Proceedings of the American Control Conference, pp. 1161 -- 1167, 2021
  27. T. C, C. Kang, T. Lee, "Dynamics and Control of a Flapping Wing UAV with Abdomen Undulation Inspired by Monarch Butterfly", in Proceedings of the American Control Conference, pp. 66 -- 71, 2021
  28. B. Yu, K. Gamagedara, S. Kim, T. Lee, J. Suk, "Geometric Control and Experimental Validation for a Quadrotor UAV Transporting a Payload", in Proceedings of IEEE Conference on Decision and Control, pp. 201--207, 2020
  29. T. Lee, M. Keidar, "Adaptive Plasma and Machine Learning", in Plasma Cancer Therapy, pp. 223--250, 2020
  30. W. Wang, T. Lee, "Spectral Uncertainty Propagation for Generalized Stochastic Hybrid Systems with Applications to a Bouncing Ball", in Proceedings of the American Control Conference, pp. 1803--1808, 2020
  31. T. Lee, "Adaptive Learning Kalman Filter With Gaussian Process", in Proceedings of the American Control Conference, pp. 4442--4447, 2020
  32. H. Sharma, T. Lee, M. Patil, C. Woolsey, "Symplectic Accelerated Optimization on SO(3) with Lie Group Variational Integrators", in Proceedings of the American Control Conference, pp. 2826--2831, 2020
  33. W. Wang, T. Lee, "Matrix Fisher--Gaussian Distribution on SO(3)XRn for Attitude Estimation with a Gyro Bias", in Proceedings of the American Control Conference, pp. 4429--4434, 2020
  34. M. Sridhar, C. Kang, T. Lee, "Geometric Formulation for the Dynamics of Monarch Butterfly with the Effects of Abdomen Undulation", in Proceedings of the AIAA Scitech Forum, 2020, AIAA 2020-1962
  35. J. Pohly, C. Kang, M. Sridhar, D. Landrum, F. Fahimi, J. Bluman, H. Aono, T. Lee, "Scaling Bioinspired Mars Flight Vehicles for Hover", in Proceedings of the AIAA Scitech Forum, 2019, AIAA 2019-0567
  36. H. Sharma, T. Lee, "Energy-preserving, Adaptive Time-Step Lie Group Variational Integrators for the Attitude Dynamics of a Rigid Body", in Proceedings of the American Control Conference, pp. 5487--5492, 2019
  37. K. Gamagedara, M. Bisheban, E. Kaufman, T. Lee, "Geometric Controls of a Quadrotor with a Decoupled Yaw Control", in Proceedings of the American Control Conference, 2019
  38. K. Gamagedara, T. Lee, D. Chang, "Attitude Observer on SO(3) with Time-Varying Reference Directions", in Proceedings of the European Control Conference, pp. 4034--4039, 2019
  39. T. Lee, "Spacecraft Attitude Estimation with a Single Magnetometer Using Matrix Fisher Distributions on SO(3)", in Proceedings of the AIAA Guidance, Navigation and Control Conference, 2019, AIAA 2019-1173
  40. K. Gamagedara, T. Lee, M. Snyder, "Real-time Kinematics GPS Based Telemetry System for Airborne Measurements of Ship Air Wake", in Proceedings of AIAA Aerospace Sciences Meeting, 2019, AIAA 2019-2377
  41. E. Kaufman, T. Lee, "Autonomous Aerial Exploration for Topological Mapping of Mars Environments", in Proceedings of the AIAA Guidance, Navigation and Control Conference, 2019, AIAA 2019-1915
  42. M. Bisheban, T. Lee, "Geometric Adaptive Control for a Quadrotor UAV with Wind Disturbance Rejection", in Proceedings of IEEE Conference on Decision and Control, pp. 2816--2821, 2018
  43. T. Lee, "Bayesian Attitude Estimation with Approximate Matrix Fisher Distributions on SO(3)", in Proceedings of IEEE Conference on Decision and Control, pp. 5319--5325, 2018
  44. Z. Zhao, G. Cruz, T. Lee, D. Bernstein, "Adaptive Attitude Control of a Dual-Rigid-Body Spacecraft with Unmodeled Nonminimum-Phase Dynamics", in Proceedings of the American Control Conference, pp. 2503--2508, 2018
  45. L. Simon, R. Agnes, K. Gamagedara, K. Takami, M. Snyder, T. Lee, "Studies on Autonomous Landing of an Unmanned Aerial Vehicle on a Vessel", in Proceedings of AIAA Information Systems, 2018, AIAA 2018-1461
  46. S. Kulumani, T. Lee, "Real Time Adaptive Shape Reconstruction for Asteroid Landing", in Proceedings of the AAS/AIAA Astrodynamics Specialist Conference, 2018, AAS 18-319
  47. K. Takami, T. Lee, "Environment dependent depth enhancement with multi-modal sensor fusion learning", in Proceedings of the IEEE International Conference on Robotic Computing, pp. 232--237, 2018
  48. E. Kaufman, K. Takami, T. Lee, "Autonomous Quadrotor 3D Mapping and Exploration Using Exact Occupancy Probabilities", in Proceedings of the IEEE International Conference on Robotic Computing, pp. 49--55, 2018
  49. S. Kulumani, K. Takami, T. Lee, "Geometric Control for Autonomous Landing on Asteroid Itokawa using Visual Localization", in Proceedings of the AAS/AIAA Astrodynamics Specialist Conference, 2017, AAS 17-720
  50. M. Bisheban, T. Lee, "Computational Geometric Identification for the Quadrotor Dynamics in Wind Fields", in Proceedings of the IEEE Conference on Control Technology and Applications, pp. 1153--1158, 2017
  51. C. Mallon, B. Muthig, K. Gamagedara, K. Patil, C. Friedman, T. Lee, M. Snyder, "Measurements of Ship Air Wake Using Airborne Anemometers", in Proceedings of AIAA Aerospace Sciences Meeting, 2017, doi:http://dx.doi.org/10.2514/6.2017-0252, AIAA 2017-0252
  52. S. Kulumani, T. Lee, "Bayesian Attitude Estimation on SO(3) with Matrix Fisher Mixtures", in Proceedings of the AIAA/AAS Spaceflight Mechanics Meeting, 2017, AAS 17-324
  53. M. Bisheban, T. Lee, "Computational Geometric System Identification for the Attitude Dynamics on SO(3)", in Proceedings of the American Control Conference, pp. 2249--2254, 2017
  54. T. Lee, D. Chang, Y. Eun, "Attitude Control Strategies Overcoming the Topological Obstruction on SO(3)", in Proceedings of the American Control Conference, pp. 4942--4947, 2017
  55. K. Lee, C. Park, T. Lee, S. Park, "Spacecraft formation keeping via discrete-time Hamilton-Jacobi theory", in Proceedings of the AIAA Guidance, Navigation and Control Conference, 2016, doi:10.2514/6.2016-0874, AIAA 2016-0874
  56. E. Kaufman, Z. Ai, T. Lee, "Autonomous Exploration by Expected Information Gain from Probabilisitic Occupancy Grid Mapping", in Proceedings of the IEEE Conference on Simulation, Modeling, and Programming for Autonomous Robots, 2016
  57. T. Lee, "Optimal Hybrid Controls for Global Exponential Tracking on the Two-Sphere", in Proceedings of the IEEE Conference on Decision and Control, pp. 3331-3337, 2016
  58. S. Kulumani, T. Lee, "Low-thrust Trajectory Design using Reachability sets near asteroid 4769 Castalia", in Proceedings of the AIAA/AAS Astrodynamics Specialist Conference, 2016, doi:10.2514/6.2016-5376, AIAA 2016-5376
  59. F. Goodarzi, T. Lee, "Extended Kalman filter on SE(3) for geometric control of a quadrotor UAV", in Proceedings of the IEEE International Conference on Unmanned Aircraft Systems, pp. 1371--1380, 2016
  60. E. Kaufman, T. Lee, Z. Ai, I. Moskowitz, "Bayesian Occupancy Grid Mapping via an Exact Inverse Sensor Model", in Proceedings of the American Control Conference, pp. 5709--5715, 2016
  61. S. Kulumani, C. Poole, T. Lee, "Geometric Adaptive Control of Attitude Dynamics on SO(3) with State Inequality Constraint", in Proceedings of the American Control Conference, pp. 4936--4941, 2016
  62. T. Lee, "Global Unscented Attitude Estimation via the Matrix Fisher Distributions on SO(3)", in Proceedings of the American Control Conference, pp. 4942--4947, 2016
  63. S. Kulumani, T. Lee, "Systematic Design of Optimal Low-Thrust Transfers for the Three-Body Problem", in Proceedings of the AIAA/AAS Astrodynamics Specialist Conference, 2015, AAS 15-757
  64. E. Kaufman, T. Lee, "Geometric Adaptive Control for Aerial Transportation of a Rigid Body", 2015, Presented at International Conference on Robotics and Automation
  65. T. Lee, M. Leok, N. H. McClamroch, "Global Formulations of Lagrangian and Hamiltonian Dynamics on Embedded Manifolds", in Proceedings of the IMA Conference on Mathematics of Robotics, 2015
  66. T. Lee, "Geometric Adaptive Control for Aerial Transportation of a Rigid Body", in Proceedings of the IMA Conference on Mathematics of Robotics, 2015
  67. T. Wu, E. Kaufman, T. Lee, "Globally Asymptotically Stable Attitude Observer on SO(3)", in Proceedings of the IEEE Conference on Decision and Control, pp. 2164--2168, 2015
  68. T. Lee, "Geometric Controls for a Tethered Quadrotor UAV", in Proceedings of the IEEE Conference on Decision and Control, pp. 2749--2754, 2015
  69. T. Lee, M. Leok, N. H. McClamroch, "Global Formulations of Lagrangian and Hamiltonian Mechanics on Two-Spheres", in Proceedings of the IEEE Conference on Decision and Control, pp. 6010--6015, 2015
  70. E. Kaufman, A. Lovell, T. Lee, "Nonlinear Observability Measure for Relative Orbit Determination with Angles-Only Measurements", in Proceedings of the AAS/AIAA Space Flight Mechanics Meeting, 2015, AAS 15-451
  71. T. Lee, F. Leve, M. Leok, N. H. McClamroch, "Lie group variational integrators for spacecraft with variable speed control moment gyros", in Proceedings of the U.S. National Congress on Computational Mechanics, 2015
  72. T. Wu, T. Lee, "Angular velocity observer on the special orthogonal group for velocity-free rigid-body attitude tracking control", in Proceedings of the European Control Conference, pp. 1824--1829, 2015
  73. T. Wu, T. Lee, "Spacecraft Attitude Formation Stabilization Using Lines-Of-Sight Without Angular Velocity Measurements", in Proceedings of the AAS/AIAA Space Flight Mechanics Meeting, 2015, AAS 15-441
  74. E. Kaufman, A. Lovell, T. Lee, "Minimum Uncertainty JPDA Filter and Coalescence Avoidance Performance Evaluations", in Proceedings of the AAS/AIAA Space Flight Mechanics Meeting, 2015, AAS 15-451
  75. F. Goodarzi, T. Lee, "Dynamics and Control of Quadrotor UAVs Transporting a Rigid Body Connected via Flexible Cables", in Proceedings of the American Control Conference, pp. 4677--4682, 2015
  76. T. Lee, "Collision Avoidance via Voronoi Tessellation for Quadrotor UAVs Transporting a Payload", in Proceedings of the American Control Conference, pp. 1842--1848, 2015
  77. N. H. McClamroch, T. Lee, "Optimal flight planning for a jet aircraft mission", in Case Studies in Operations Research, pp. 355--390, 2015
  78. S. Dai, T. Lee, D. Bernstein, "Adaptive Control of a Quadrotor UAV Transporting a Cable-Suspended Load with Unknown Mass", in Proceedings of the IEEE Conference on Decision and Control, pp. 6149--6154, 2014
  79. T. Wu, T. Lee, "Spacecraft Position and Attitude Formation Control using Line-of-Sight Observations", in Proceedings of the IEEE Conference on Decision and Control, pp. 970--975, 2014
  80. T. Lee, "Geometric Control of Multiple Quadrotor UAVs Transporting a Cable-Suspended Rigid Body", in Proceedings of the IEEE Conference on Decision and Control, pp. 6155--6160, 2014
  81. T. Lee, F. Leve, "Lagrangian Mechanics and Lie Group Variational Integrators for Spacecraft with Imbalanced Reaction Wheels", in Proceedings of the American Control Conference, pp. 3122--3127, 2014
  82. F. Goodarzi, D. Lee, T. Lee, "Geometric Stabilization of a Quadrotor UAV with a Payload Connected by Flexible Cable", in Proceedings of the American Control Conference, pp. 4925--4930, 2014
  83. J. Dougherty, D. Lee, T. Lee, "Laser-based Guidance of a Quadrotor UAV for Precise Landing on an Inclined Surface", in Proceedings of the American Control Conference, pp. 1210--1215, 2014
  84. T. Lovell, T. Lee, "Nonlinear Observability for Relative Satellite Orbits with Angles-Only Measurements", in Proceedings of the International Symposium on Space Flight Dynamics, 2014
  85. E. Kaufman, K. Caldwell, D. Lee, T. Lee, "Design and Development of a Free-Floating Hexrotor UAV for 6-DOF Maneuvers", in Proceedings of the IEEE Aerospace Conference, 2014
  86. E. Kaufman, T. Lee, "Optimal Joint Probabilistic Data Association Filter Avoiding Coalescence in Close Proximity", in Proceedings of the European Control Conference, pp. 2709--2714, 2014
  87. T. Lee, "Stochastic optimal motion planning and global estimation for the attitude kinematics on SO(3)", in Proceedings of the IEEE Conference on Decision and Control, 2013
  88. T. Lee, K. Sreenath, V. Kumar, "Geometric Control of Cooperating Multiple Quadrotor UAVs with a Suspended Load", in Proceedings of the IEEE Conference on Decision and Control, 2013
  89. K. Sreenath, T. Lee, V. Kumar, "Geometric control and differential flatness of a quadrotor UAV with a cable-suspended load", in Proceedings of the IEEE Conference on Decision and Control, pp. 2269--2274, 2013
  90. T. Lee, M. Keidar, "Low-thrust orbital maneuver analysis for Cubesat with micro-cathode thruster", in Proceedings of the International Electric Propulsion Conference, 2013, IEPC-2013-365
  91. T. Wu, T. Lee, M. Keidar, "Low-thrust attitude control for nano-satellite with micro-cathode thrusters", in Proceedings of the International Electric Propulsion Conference, 2013, IEPC-2013-366
  92. M. Camblor, A. Xie, G. Cruz, S. Esteban, T. Lee, D. Bernstein, "A numerical comparison of inertia-free attitude control laws for a spacecraft with a discrete flexible mode", in Proceedings of the AIAA Guidance, Navigation and Control Conference, 2013, AIAA 2013-4562
  93. F. Goodarzi, D. Lee, T. Lee, "Geometric nonlinear PID control of a quadrotor UAV on SE(3)", in Proceedings of the European Control Conference, pp. 3845--3850, 2013
  94. T. Lee, "Robust Global Exponential Attitude Tracking Controls on SO(3)", in Proceedings of the American Control Conference, pp. 2103--2108, 2013
  95. T. Wu, B. Flewelling, F. Leve, T. Lee, "Spacecraft Relative Attitude Formation Tracking on SO(3) Based on Line-of-Sight Measurements", in Proceedings of the American Control Conference, pp. 4827--4832, 2013
  96. T. Lee, M. Leok, "Computational Geometric Uncertainty Propagation and global estimation for Hamiltonian systems on a Lie group", in Proceedings of the NSF CMMI Research and Innovation Conference, 2012
  97. T. Lee, M. Leok, N. H. McClamroch, "Nonlinear robust tracking control of a quadrotor UAV on SE(3)", in Proceedings of the American Control Conference, pp. 4649--4654, 2012
  98. T. Lee, M. Leok, N. H. McClamroch, "Dynamics and Control of a Chain Pendulum on a Cart", in Proceedings of the IEEE Conference on Decision and Control, pp. 2502--2508, 2012
  99. T. Lee, "Relative attitude control of two spacecraft on SO(3) using line-of-sight observations", in Proceedings of the American Control Conference, pp. 167--172, 2012
  100. T. Lee, "Discrete-time Optimal Feedback Control via the Discrete Hamilton-Jacobi theory with applications to Hybrid Systems", in Proceedings of the IEEE Conference on Decision and Control, pp. 7055--7062, 2012
  101. T. Fernando, J. Chandiramani, T. Lee, H. Gutierrez, "Robust adaptive geometric tracking controls on SO(3) with an application to the attitude dynamics of a quadrotor UAV", in Proceedings of the IEEE Conference on Decision and Control, pp. 7380--7385, 2011
  102. T. Lee, M. Leok, N. H. McClamroch, "Geometric numerical integration for complex dynamics of tethered spacecraft", in Proceedings of the American Control Conference, pp. 1885--1891, 2011
  103. T. Lee, M. Leok, "Computational Geometric Uncertainty Propagation for Hamiltonian Systems on a Lie Group", in Proceedings of the NSF CMMI Research and Innovation Conference, 2011
  104. T. Lee, M. Leok, N. H. McClamroch, "Stable manifolds of saddle points for pendulum dynamics on S2 and SO(3)", in Proceedings of the IEEE Conference on Decision and Control, pp. 3915--3921, 2011
  105. T. Lee, M. Leok, N. H. McClamroch, "Geometric tracking control of a quadrotor UAV for extreme maneuverability", in Proceedings of the World Congress of the International Federation of Automatic Control, pp. 6337--6342, 2011
  106. T. Lee, "Geometric tracking control of the attitude dynamics of a rigid body on SO(3)", in Proceedings of the American Control Conference, pp. 1200--1205, 2011
  107. T. Lee, M. Leok, N. H. McClamroch, "Geometric tracking control of a quadrotor UAV on SE(3)", in Proceedings of the IEEE Conference on Decision and Control, pp. 5420--5425, 2010
  108. T. Lee, M. Leok, N. H. McClamroch, "Computational Geometric Optimal Control of Connected Rigid Bodies in a Perfect Fluid", in Proceedings of the American Control Conference, pp. 5985--5990, 2010
  109. T. Lee, M. Leok, N. H. McClamroch, "Dynamics of Connected Rigid Bodies in a Perfect Fluid", in Proceedings of the American Control Conference, pp. 408--413, 2009
  110. T. Lee, M. Leok, N. H. McClamroch, "Dynamics of a 3D Elastic String Pendulum", in Proceedings of IEEE Conference on Decision and Control, pp. 3347--3352, 2009
  111. T. Lee, M. Leok, N. H. McClamroch, "Discrete Control Systems", in the Encyclopedia of Complexity and System Science, pp. 2002--2019, 2009
  112. T. Lee, M. Leok, N. H. McClamroch, "Global Symplectic Uncertainty Propagation on SO(3)", in Proceedings of the IEEE Conference on Decision and Control, pp. 61--66, 2008
  113. T. Lee, M. Leok, N. H. McClamroch, "Time Optimal Attitude Control for a Rigid Body", in Proceedings of the American Control Conference, pp. 5210--5215, 2008
  114. T. Lee, M. Leok, N. H. McClamroch, "Optimal attitude control for a rigid body with symmetry", in Proceedings of the American Control Conference, pp. 1073--1078, 2007
  115. T. Lee, M. Leok, N. H. McClamroch, "A combinatorial optimal control problem for spacecraft formation reconfiguration", in Proceedings of the IEEE Conference on Decision and Control, pp. 5370--5375, 2007
  116. T. Lee, M. Leok, N. H. McClamroch, A. Sanyal, "Global attitude estimation using single direction measurements", in Proceedings of the American Control Conference, pp. 3659--3664, 2007
  117. T. Lee, N. Chaturvedi, A. Sanyal, M. Leok, N. H. McClamroch, "Propagation of uncertainty in rigid body attitude flows", in Proceedings of the IEEE Conference on Decision and Control, pp. 2689--2694, 2007
  118. E. Fahnestock, T. Lee, M. Leok, N. H. McClamroch, D. Scheeres, "Polyhedral potential and variational integrator computation of the full two body problem", in Proceedings of the AIAA/AAS Astrodynamics Specialist Conference and Exhibit, 2006, AIAA 2006-6289
  119. T. Lee, M. Leok, N. H. McClamroch, "Optimal control of a rigid body using geometrically exact computations on SE(3)", in Proceedings of the IEEE Conference on Decision and Control, pp. 2170--2175, 2006
  120. T. Lee, M. Leok, N. H. McClamroch, "Attitude Maneuvers of a Rigid Spacecraft in a Circular Orbit", in Proceedings of the American Control Conference, pp. 1742--1747, 2006
  121. T. Lee, A. Sanyal, M. Leok, N. H. McClamroch, "Deterministic global attitude estimation", in Proceedings of the IEEE Conference on Decision and Control, pp. 3174--3179, 2006
  122. T. Lee, M. Leok, N. H. McClamroch, "A Lie group variational integrator for the attitude dynamics of a rigid body with application to the 3D pendulum", in Proceedings of the IEEE Conference on Control Application, pp. 962--967, 2005
  123. T. Lee, Y. Kim, D. Kim, "Stability Analysis of Nonlinear Flight Control Using Neural Networks", in Proceedings of the 3rd Asian Control Conference, 2000
  124. T. Lee, Y. Kim, "Robust Nonlinear Control of Flight Dynamics Using Backstepping Controller", in Proceedings of the Korean Society for Aeronautical and Space Sciences Fall Conference, 1999
  125. T. Lee, Y. Kim, "Nonlinear Adaptive Control of Flight Dynamics Using Backstepping and Neural Networks Controller", in Proceedings of the Institute of Control, Automation, and System Engineering 5th Conference, 1999
  126. J. Ahn, T. Lee, Y. Kim, "Real-Time Missile Trajectory Optimization using Parameter Optimization", in Proceedings of the Japan Society for Aeronautical and Space Sciences (JSASS) 13th International Sessions in 37th Aircraft Symposium, 1999