期刊
IEEE TRANSACTIONS ON AUTOMATIC CONTROL
卷 64, 期 6, 页码 2480-2487出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAC.2018.2868026
关键词
Disturbance observer (DO); mismatched uncertainties; sliding mode control (SMC); underactuated robotic system
资金
- National Natural Science Foundation of China [61473130]
- special program for technology innovation of Hubei Province [2016AAA039]
- Beijing Advanced Innovation Center of Intelligent Robots and Systems [2016IRS10]
In this note, a high-order disturbance observer for a class of underactuated robotic systems with mismatched uncertainties is proposed. To improve its estimation performance, a choice method of optimal gain matrices of the high-order disturbance observer is obtained as the solution of an optimization problem. A high-order disturbance observer based sliding mode control method is also designed for this class of underactuated robotic system with mismatched disturbance. The stabilities of both the disturbance observer and the controlled closed-loop system are proved by the Lyapunov theorem. Simulations on a benchmark Ac-robot system demonstrate the efficiency of proposed approaches.
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