抄録
This paper deals with an H_∞ DIA control for the magnetic bearing considering periodic disturbance via rotor unbalance. H_∞ control problem which treats a mixed Disturbance and an Initial state uncertainty Attenuation (DIA) control is expected to provide a good transient property and a good rotational performance. In this paper, we propose an H_∞ DIA control system design in order to attenuate the periodic disturbance of the magnetic bearing caused by the vibration of rotor unbalance. In fact, this H_∞ DIA control system design can obtain a controller by adding a frequency weighting function in generalized plant. Then, we carry out an experiment in order to validate proposed control system design by switching control. Switching control consists of two proposed controllers and a switching logic, it can be switched at a certain rotational speed. Finally, experimental results show that the proposed robust control approach is effective for improving rotational performance.
