Design of model-based unbalance compensator with fuzzy gain tuning mechanism for an active magnetic bearing system

作者：Tung Pi Cheng^*; Tsai Mong Tao; Chen Kuan Yu; Fan Yi Hua; Chou Fu Chu

来源：Expert Systems with Applications, 2011, 38(10): 12861-12868.

DOI：10.1016/j.eswa.2011.04.078

• Unbalanced vibration
• Model-based integral-type observer
• Fuzzy gain tuning mechanism
• Active magnetic bearing

This paper deals with the unbalanced vibration problem of a stabilized active magnetic bearing (AMB) system. First, a model-based integral-type observer is proposed to evaluate the shaft displacement and the unbalancing forces of the rotor of an AMB system controlled by a proportional-integral-derivative (PID) controller. A fuzzy gain tuning mechanism is added to adjust the output of the PID controller in order to overcome the disturbances and suppress the unbalancing vibration. We have shown via simulation that the addition of the integral-type force observer improves the rotating accuracy in the device operating range. The experimental results demonstrate an efficient reduction of the shaft displacement of the rotor. Thus, the proposed scheme allows for a remarkable improvement in the unbalanced vibration of an AMB system over conventional PID controls without fuzzy gain tuning mechanism.

• 出版日期2011-9-15
• 单位中央民族大学