The Visual Computer

, Volume 26, Issue 6–8, pp 893–901

A nonsmooth nonlinear conjugate gradient method for interactive contact force problems

  • Morten Silcowitz-Hansen
  • Sarah Niebe
  • Kenny Erleben
Original Article
  • 137 Downloads

Abstract

Interactive rigid body simulation is important for robot simulation and virtual design. A vital part of the simulation is the computation of contact forces. This paper addresses the contact force problem, as used in interactive simulation. The contact force problem can be formulated in the form of a nonlinear complementarity problem (NCP), which can be solved using an iterative splitting method, such as the projected Gauss–Seidel (PGS) method. We present a novel method for solving the NCP problem by applying a Fletcher–Reeves type nonlinear nonsmooth conjugate gradient (NNCG) type method. We analyze and present experimental convergence behavior and properties of the new method. Our results show that the NNCG method has at least the same convergence rate as PGS, and in many cases better.

Keywords

Contact force computation Rigid body simulation Nonsmooth conjugate gradients 

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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Morten Silcowitz-Hansen
    • 1
  • Sarah Niebe
    • 1
  • Kenny Erleben
    • 1
  1. 1.Department of Computer ScienceUniversity of CopenhagenCopenhagenDenmark

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