Abstract
Hybrid suspension system with permanent-magnet and electromagnet consumes little power consumption, and can realize larger suspension gap. We took magnetic flux signal as a state variable, and put this signal back to suspension control system. So we got the hybrid suspension mathematical model based on magnetic flux signal feedback. With application of MIMO feedback linearization theory, we can realize linearization of the hybrid suspension system. Then PIDB (proportion, integral, differentiation, magnetic flux density B) controller was designed. Some hybrid suspension experiments had been done on CMS04 magnetic suspension bogie of NUDT (National University of Defense Technology) in China. The experiment results denote that hybrid suspension control algorithm based on magnetic flux signal feedback designed has more advantages than traditional position-current double cascade control algorithm. Obviously the robustness and stability of hybrid suspension system have been enhanced.
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