抄録
This paper addresses the vibration control and the motion control of a cantilever by using a bimorph piezoelectric actuator, based on the concept of smart materials and structures, and discusses the method of how to separate a sensing output signal from measured data include control input signal. The input-output relationship of a self-sensing system on the cantilever using piezoelectric actuator can be described by the state space expression with a direct part. Adopting observer theory is proposed in order to control estimated state vectors with a state feedback controller such as the LQ or H_∞ controller, and to separate measured data. Calculated simulation result by identified model using the subspace state space identification method shows that the proposed method can be achieved to suppress the vibration and separate sensing output without using the bridge circuit.
