A method is presented for formulating and numerically integrating ordinary differential equations of motion for nonholonomically constrained multibody systems. Tangent space coordinates are defined in configuration and velocity spaces as independent generalized coordinates that serve as state variables in the formulation, yielding ordinary differential equations of motion. Orthogonal-dependent coordinates and velocities are used to enforce constraints at position, velocity, and acceleration levels. Criteria that assure accuracy of constraint satisfaction and well conditioning of the reduced mass matrix in the equations of motion are used as the basis for updating local coordinates on configuration and velocity constraint manifolds, transparent to the user and at minimal computational cost. The formulation is developed for multibody systems with nonlinear holonomic constraints and nonholonomic constraints that are linear in velocity coordinates and nonlinear in configuration coordinates. A computational algorithm for implementing the approach is presented and used in the solution of three examples: one planar and two spatial. Numerical results using a fifth-order Runge–Kutta–Fehlberg explicit integrator verify that accurate results are obtained, satisfying all the three forms of kinematic constraint, to within error tolerances that are embedded in the formulation.
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March 2017
Research-Article
An Ordinary Differential Equation Formulation for Multibody Dynamics: Nonholonomic Constraints
Edward J. Haug
Edward J. Haug
Carver Distinguished Professor Emeritus
Department of Mechanical Engineering,
The University of Iowa,
Iowa City, IA 52242
e-mail: echaug@gmail.com
Department of Mechanical Engineering,
The University of Iowa,
Iowa City, IA 52242
e-mail: echaug@gmail.com
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Edward J. Haug
Carver Distinguished Professor Emeritus
Department of Mechanical Engineering,
The University of Iowa,
Iowa City, IA 52242
e-mail: echaug@gmail.com
Department of Mechanical Engineering,
The University of Iowa,
Iowa City, IA 52242
e-mail: echaug@gmail.com
Contributed by the Design Engineering Division of ASME for publication in the JOURNAL OF COMPUTING AND INFORMATION SCIENCE IN ENGINEERING. Manuscript received June 7, 2016; final manuscript received August 4, 2016; published online November 7, 2016. Editor: Bahram Ravani.
J. Comput. Inf. Sci. Eng. Mar 2017, 17(1): 011009 (14 pages)
Published Online: November 7, 2016
Article history
Received:
June 7, 2016
Revised:
August 4, 2016
Citation
Haug, E. J. (November 7, 2016). "An Ordinary Differential Equation Formulation for Multibody Dynamics: Nonholonomic Constraints." ASME. J. Comput. Inf. Sci. Eng. March 2017; 17(1): 011009. https://doi.org/10.1115/1.4034435
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