In order to ensure the damping performance and improve the energy recovery performance of active suspension, a self powered active suspension system based on electromagnetic hybrid actuator is proposed, which adopts hierarchical coordinated switching control strategy, including upper controller and lower controller. Considering the motor loss, the energy flow state of the actuator is analyzed, and the self energy supply criterion is obtained. The lower nonlinear double closed-loop controller is designed to control the actuator through the energy feed / energy supply circuit; According to the analysis of the lower system, the upper coordinated switching controller with active, semi-active and energy feedback modes is designed. The effectiveness of the control strategy is simulated and verified in Matlab / Simulink environment, and the performance of electromagnetic hybrid active suspension is analyzed. The results show that the dynamic performance of the proposed suspension system is basically consistent with the active suspension without energy recovery function, and the average power of the energy storage module is less than 0, which conforms to the self energy supply criterion. Under this control strategy, the suspension system can realize self energy supply.
Key words
Electromagnetic hybrid suspension /
Energy flow analysis /
Coordinated switching /
Energy recovery /
Nonlinear double closed loop control
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