Decoupling control algorithm of magnetic suspension system based on current optimization

A new decoupling algorithm is developed to decouple and linearize the nonlinear magnetic suspension system based on current optimization and feedback linearization. Golden section method is applied in the current optimal algorithm to search for the idea current of each coil. In order to control the control voltage on each coil to track the idea current as quickly as possible, 3-step current algorithm is used to improve the response speed and precision of the magnetic suspension actuator. The real-time of decoupling algorithm is verified by numerical experiment on PC. Phase-lead controller is then designed and implemented for each three resulting motions. Experimental results are presented to illustrate the performance of the system dynamic response, current response in each coil.