曲げ・ねじり変形を考慮したアームに対する力フィードバックの安定性解析とロバスト力制御

抄録

In this paper, stability analysis and robust control of a force-controlled arm having a rigid tip body, of which the mass centerr lies on the central axis of the arm. We consider link flexibility as uncertainty and derive dynamic equations of the force-controlled arm. As the obtained boundary condition is nonhomogeneous, we introduce a change of variables to derive homogeneous boundary conditions. On the basis of a finite-dimensional modal model of distributed-parameter systems, stability of the force feedback is analyzed by using the root locus technique, and an optimal controller with low-pass property as a robust controller is constructed. Simulations have been carried out.