구동기 고장과 불확실성으로 인한 성능 저하를 가지는 로봇 매니퓰레이터에 대한 강인한 적응 내고장 제어

Robust Adaptive Fault-Tolerant Control for Robot Manipulators with Performance Degradation Due to Actuator Failures and Uncertainties

  • 신진호 (동의대 메카트로닉스공학과) ;
  • 백운보 (동의대 메카트로닉스공학과)
  • 발행 : 2004.03.01

초록

In normal robot control systems without any actuator failures, it is assumed that actuator torque coefficients applied at each joint have normally 1's all the time. However, it is more practical that actuator torque coefficients applied at each joint are nonlinear time-varying. In other words, it has to be considered that actuators equipped at joints may fail due to hardware or software faults. In this work, actuator torque coefficients are assumed to have non-zero values at all joints. In the case of an actuator torque coefficient which has a zero value at a joint, it means the complete loss of torque on the joint. This paper doesn't deal with the case. As factors of performance degradation of robots, both actuator failures and uncertainties are considered in this paper at the same time. This paper proposes a robust adaptive fault-tolerant control scheme to maintain the required performance and achieve task completion for robot manipulators with performance degradation due to actuator failures and uncertainties. Simulation results are shown to verify the fault tolerance and robustness of the Proposed control scheme.

키워드

참고문헌

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