Andrew D. Lewis's Talks

2024a

Title: Geodesic invariance and the symmetric product: mechanics, control theory, and geometry
Detail: GENTLE Seminar, Universitat Autonònoma de Barcelona (online), 2024/08/18

2023c

Title: Variational and nonholonomic mechanics
Detail: Deleonfast, ICMAT, Madrid (online), 2023/12/11

2023b

Title: Variational and nonholonomic mechanics
Detail: Vistas in Control, University of California, Santa Barbara, 2023/10/23

2023a

Title: Composition, superposition, and ordinary differential equations
Detail: BIRS Workshop on Geometry, Topology and Control System Design, 2023/06/12

2021a

Title: Why is geometric control theory so difficult?
Detail: SIAM Conference on Control Theory and its Applications (online), 2021/07/19

2019c

Title: Nature does not always optimise like we want her to
Detail: Department of Electrical and Computer Engineering, University of Waterloo, 2019/08/02

2019b

Title: Some problems concerning classical mechanics and the calculus of variations
Detail: Department of Mathematics and Statistics, University of Ottawa, 2019/03/29

2019a

Title: How to use topology to make basic ordinary differential equations complicated, and also make hard differential equations easy
Detail: Department of Mathematics and Statistics, University of Ottawa, 2019/03/29

2018b

Title: Characterisation of flows using locally convex topologies
Detail: AMS Fall Central Sectional Meeting, University of Michigan, 2018/10/20

2018a

Title: The exponential map for time-varying and parameter-dependent vector fields
Detail: 8th meeting on Systems and Control Theory, University of Toronto, 2018/05/07

2016b

Title: Tautological control systems
Detail: Geometric Methods in Mechanics and Control With Applications, Canadian Mathematical Society Summer Meeting, Edmonton, AB, 2016/06/26

2016a

Title: Control theory may be different than you think it is
Detail: Keynote address, CDSR'16, University of Ottawa, 2016/05/09

2015b

Title: Tautological control systems
Detail: Nonlinear Control and Geometry, Banach Center Conference, Będlewo, Poland, 2015/08/24

2015a

Title: Tautological control systems
Detail: Informal Systems Seminar, McGill University, 2015/02/27

2014a

Title: Tautological control systems
Detail: 53rd IEEE Conference on Decision and Control, Los Angeles, 2014/12/17

2013b

Title: Mathematical models for control systems
Detail: Workshop on Control and Observation of Nonlinear Control Systems with Application to Medicine, University of Hawaii, 2013/09/06

2013a

Title: Some interesting things about real analyticity
Detail: UCSB CCDC Workshop on Vistas in Control (aka, A Birthday Party for Richard Murray), University of California, Santa Barbara, 2013/05/03

2012c

Title: Fundamental problems of geometric control theory
Detail: 51st IEEE Conference on Decision and Control, Maui, 2012/12/13

2012b

Title: Fundamental problems in geometric control theory
Detail: Colloquium, Department of Mathematics, Universidad Carlos III de Madrid, 2012/05/24

2012a

Title: Why are the theories of controllability and stabilisability so different, and should they be?
Detail: 5th Biennial Meeting on Systems and Control Theory, 2012/05/07

2010a

Title: Differential geometric methods for the control of mechanical systems
Detail: CRM Applied Mathematics Seminar, 2010/11/01

2009a

Title: Differential geometry, control theory, and mechanics
Detail: Department of Mechanical Engineering, Johns Hopkins University, 2009/02/19

2008d

Title: Jet bundles and algebro-geometric characterisations for controllability of affine systems
Detail: 47th IEEE Conference on Decision and Control, Cancun, 2008/12/09

2008c

Title: The local structure of affine systems
Detail: AMS-SBM Joint International Meeting, IMPA, Rio de Janeiro, Brazil, 2008/06/05

2008b

Title: Controllability: A brief revisionist tutorial
Detail: Meeting on Nonlinear Control Theory and its Applications, Waterloo ON, 2008/05/08

2008a

Title: Mathematics from applied mathematics
Detail: Math Club, 2008/04/03

2007a

Title: Some results on energy shaping feedback
Detail: Geometric Mechanics: Continuous and Discrete, Finite and Infinite Dimensional, Banff International Research Station, 2007/08/13

2006d

Title: An example with interesting controllability and stabilisation properties
Detail: 45th IEEE Conference on Decision and Control, San Diego, 2006/12/14

2006c

Title: Potential energy shaping after kinetic energy shaping
Detail: 45th IEEE Conference on Decision and Control, San Diego, 2006/12/14

2006b

Title: Energy shaping
Detail: Meeting on Nonlinear Control Theory and its Applications, Toronto ON, 2006/05/04

2006a

Title: Control theory without controls
Detail: AMS Joint Mathematics Meeting, San Antonio, 2006/01/15

2005d

Title: Control of mechanical systems
Detail: Department of Mathematics, University of Hawaii, 2005/12/14

2005c

Title: Problems and partial results in energy shaping
Detail: Laboratoire des Signaux et Systémes, Centre National de la Recherche Scientifique, Supélec, 2005/03/24

2005b

Title: Problems and challenges in control theory for mechanical systems
Detail: Facultat de Matemàtiques i Estadística, Universitat Politècnica de Catalunya, 2005/03/16

2005a

Title: Removing ``control'' from control theory
Detail: Seminari del grup de recerca sobre Geometria diferencial, sistemes dinômics i aplicacions, Depto. Matemática Aplicada IV, Universidad Politécnica de Cataluña, 2005/01/20

2004b

Title: Notes on energy shaping
Detail: 43rd IEEE Conference on Decision and Control, Bahamas, 2004/12/17

2004a

Title: Musings on controllability and stabilisability
Detail: Meeting on Nonlinear Control Theory and its Applications, Kingston, ON, 2004/05/06

2003e

Title: Jacobian linearisation in a geometric setting
Detail: 42nd IEEE Conference on Decision and Control, Maui, 2003/12/04

2003d

Title: Affine connection control systems with interesting controllability properties
Detail: 5th CSL Workshop on Future Directions in Nonlinear Control of Mechanical Systems, University of Illinois, Urbana-Champaign, 2003/10/04

2003c

Title: The role of controllability in motion planning for affine connection control systems
Detail: First Joint AMS/RSME Meeting, Seville, Spain, 2003/06/19

2003b

Title: From controllability to motion planning for mechanical systems
Detail: 3rd International DCDIS Conference on Engineering Applications and Computational Algorithms, Guelph, ON, 2003/05/16

2003a

Title: Some mechanical systems are difficult to control
Detail: Mathematics Department, Arizona State University, 2003/04/25

2002e

Title: Geometric local controllability: second-order conditions
Detail: 41th IEEE Conference on Decision and Control, Las Vegas, NV, 2002/12/12

2002d

Title: The category of affine connection control systems
Detail: MTNS'02, South Bend, IN, 2002/08/15

2002c

Title: Controllable kinematic reductions for mechanical systems: concepts, computational tools, and examples
Detail: MTNS'02, South Bend, IN, 2002/08/15

2002b

Title: What is the characteristic polynomial of a signal flow graph?
Detail: MTNS'02, South Bend, IN, 2002/08/12

2002a

Title: Control theory for mechanical systems
Detail: The Fourth International Conference on Dynamical Systems and Differential Equations, University of North Carolina at Wilmington, 2002/05/27

2001g

Title: Geometric first-order controllability conditions for affine connection control systems
Detail: 40th IEEE Conference on Decision and Control, Orlando, FL, 2001/12/14

2001f

Title: Control for mechanical systems
Detail: Coleman-Ellis lecture, Department of Mathematics & Statistics, Queen's University, 2001/11/07

2001e

Title: Control theory for mechanical systems
Detail: Department of Applied Mathematics, University of Waterloo, 2001/10/26

2001d

Title: Optimal control for a simplified hovercraft model
Detail: SIAM Conference on Control and its Applications, San Diego, CA, 2001/07/11

2001c

Title: Sharp first-order controllability conditions for affine connection control systems
Detail: SIAM Conference on Control and its Applications, San Diego, CA, 2001/07/11

2001b

Title: Generalised splines via the maximum principle
Detail: SIAM Conference on Control and its Applications, San Diego, CA, 2001/07/11

2001a

Title: Geometric low-order controllability conditions
Detail: Department of Mathematics & Statistics, Queen's University, 2001/02/02

2000f

Title: The category of affine connection control systems
Detail: 39th IEEE Conference on Decision and Control, Sydney, Australia, 2000/12/15

2000e

Title: Applications of differential geometry to mechanical control systems
Detail: Meeting of the Seaway Section of the Mathematics Association of America, SUNY Fredonia, New York, 2000/11/04

2000d

Title: Control theory for mechanical systems
Detail: Department of Mechanical Engineering, Carnegie Mellon University, 2000/10/18

2000c

Title: Optimal control for affine connection control systems
Detail: Invited talk for the Workshop on Mathematical Control Theory and Robotics, SISSA, Trieste, Italy, 2000/07/27

2000b

Title: Affine connection control systems
Detail: Invited talk for Math 2000, Canadian Mathematical Society meeting at McMaster University, Hamilton, Ontario, 2000/06/13

2000a

Title: Affine connection control systems
Detail: Invited talk for the IFAC Workshop on Lagrangian and Hamiltonian Methods for Nonlinear Control, Princeton, NJ, 2000/03/18

1999b

Title: When is a mechanical control system kinematic?
Detail: 38th IEEE Conference on Decision and Control, Phoenix, AZ, 1999/12/07

1999a

Title: Optimal control of affine connection control systems
Detail: Workshop on Geometric and Multibody Mechanics: Nonlinear Dynamics and Control, Mathematisches Forschungsinstitut Oberwolfach, 1999/07/30

1998e

Title: Control theory for simple mechanical control systems
Detail: Coordinated Science Laboratory, University of Illinois, Urbana-Champaign, 1998/12/03

1998d

Title: Mechanical systems on homogeneous spaces
Detail: Department of Mathematics & Statistics, Queen's University, 1998/11/06

1998c

Title: Controllability of simple mechanical control systems
Detail: 13th International Workshop on Differential Geometric Methods in Theoretical Mechanics, Alden Biesen, Belgium, 1998/08/27

1998b

Title: Mechanical systems on homogeneous spaces
Detail: University of Warwick, Workshop on Hamiltonian Systems, 1998/07/17

1998a

Title: Controllability of simple mechanical control systems
Detail: Queen's University Department of Mathematics and Statistics, 1998/03/10

1997e

Title: Lagrangian reduction for simple mechanical systems with constant orbit type
Detail: Control and Dynamical Systems Seminar, California Institute of Technology, 1997/09/08

1997d

Title: Equations of motion for nonholonomic systems
Detail: Invited talk, Workshop on Non-holonomic Constraints in Dynamics, The University of Calgary, 1997/08/28

1997c

Title: Local configuration controllability for a class of mechanical systems with a single input
Detail: European Control Conference, Brussels, Belgium, 1997/07/01

1997b

Title: Control theory for mechanical systems
Detail: Simon Frasier University Department of Mathematics, 1997/02/14

1997a

Title: Mechanical systems with symmetry (in three minutes)
Detail: MIR@W Brown Bag Lunch, 1997/01/20

1996g

Title: The role of affine connections in control theory for mechanical systems
Detail: University of Warwick Department of Mathematics, 1996/10/07

1996f

Title: Controllability of Lagrangian systems
Detail: University of New Brunswick Department of Mathematics and Statistics, 1996/08/28

1996e

Title: Controllability of Lagrangian systems
Detail: MTNS '96, 1996/06/16

1996d

Title: Control of Lagrangian systems
Detail: Ohio University Department of Mechanical Engineering, 1996/05/30

1996c

Title: Affine connections and constraints
Detail: CDS 241 Seminar, 1996/05/06

1996b

Title: The role of affine connections in mechanics and control
Detail: Control and Dynamical Systems Seminar, 1996/04/22

1996a

Title: The symmetric product in geometry, mechanics, and control theory
Detail: New Mexico State University Department of Mathematical Sciences, 1996/02/20

1995d

Title: Controllability of simple mechanical control systems
Detail: 34th IEEE Conference on Decision and Control, 1995/12/15

1995c

Title: Controllability of Lagrangian control systems
Detail: AFOSR kick off meeting, 1995/07/27

1995b

Title: Controllability of Lagrangian control systems
Detail: University of Victoria Department of Mechanical Engineering, 1995/06/09

1995a

Title: Controllability of mechanical control systems
Detail: Thesis presentation, 1995/04/21