Controller design for rigid-flexible multibody systems

Yigit A. S., Ulsoy A.

Proceedings of the 28th IEEE Conference on Decision and Control. Part 1 (of 3), Tama, Japan, 13 - 15 December 1989, vol.1, pp.665-673 identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 1
  • City: Tama
  • Country: Japan
  • Page Numbers: pp.665-673
  • Ankara Yıldırım Beyazıt University Affiliated: No


Controller design for rigid-flexible multibody systems is considered. The importance of full coupling between the rigid and flexible motions in the dynamic model is emphasized. Some computed torque-type controllers for rigid-flexible multibody systems are studied using simulations of a two-link system. It is found that a controller design based on uncoupled equations of motion generally provides good performance when evaluated on a fully coupled simulation model. Evaluating controllers, however, using uncoupled equations in the simulation can give misleading results. Robustness to nonlinearities is investigated, since the computed torque-type control cannot cancel all the nonlinear terms. Uncoupled controllers tend to be more robust than controllers based on linear quadratic design, and of the controllers considered the Corless-Leitmann controller gave the best robustness results for uncancelled nonlinear terms. Spillover and robustness to model parameter uncertainty are also investigated through simulations.