Marsden, J. E. and Wendlandt, J. M. (1997) Mechanical Systems with Symmetry, Variational Principles, and Integration Algorithms. In: Proceedings of the Symposium on Current and Future Directions in Mathematics. Birkhäuser , pp. 219-261. ISBN 081763956X http://resolver.caltech.edu/CaltechAUTHORS:20100910-132222147
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This paper studies variational principles for mechanical systems with symmetry and their applications to integration algorithms. We recall some general features of how to reduce variational principles in the presence of a symmetry group along with general features of integration algorithms for mechanical systems. Then we describe some integration algorithms based directly on variational principles using a discretization technique of Veselov. The general idea for these variational integrators is to directly discretize Hamilton’s principle rather than the equations of motion in a way that preserves the original systems invariants, notably the symplectic form and, via a discrete version of Noether’s theorem, the momentum map. The resulting mechanical integrators are second-order accurate, implicit, symplectic-momentum algorithms. We apply these integrators to the rigid body and the double spherical pendulum to show that the techniques are competitive with existing integrators.
|Item Type:||Book Section|
|Additional Information:||© 1997. Research partially supported by DOE contract DE-FG03-95ER-25251 and the California Institute of Technology. Research partially supported by DOE contract DE-FG03-95ER-25251. http://robotics.eecs.berkeley.edu/˜wents/ We thank Francisco Armero, Oscar Gonzalez, Abhi Jain, Ben Leimkuhler, Andrew Lewis, Robert MacKay, Richard Murray, George Patrick and Shmuel Weissman for useful discussions or comments.|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Ruth Sustaita|
|Deposited On:||16 Sep 2010 21:01|
|Last Modified:||26 Dec 2012 12:24|
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