In industrial motor drive systems used in industrial robots and machine tools, a torsional vibration is often generated by the elastic elements in torque transmission. Such a system can be modelled simply as a 2-mass-system. Many control methods have been useful to suppress the torsional vibration. The state feedback control using an observer, robust control using
H∞ theory, and a resonance ratio controller are some of them. However, these systems and determining of control parameters are complex. In this paper, we propose a scheme using only PID control to suppress the torsional vibration. The control performance of the proposed scheme is checked by experimental results.
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