Mode-switching control and stability analysis of a hybrid electromagnetic actuator for the vehicle suspension
Renkai Ding, Ruochen Wang, Xiangpeng Meng, Long Chen
Abstract
To coordinate the contradictory relationship between dynamic performances and electrical energy consumption of an electromagnetic active suspension, a hybrid electromagnetic actuator that integrates with a linear motor and a hydraulic damper is developed, which can achieve active control and energy regeneration compared with the linear electromagnetic actuator. A mode-switching control method is put forward based on the modified skyhook control. The stability of the switched controller with a specific switching rule is investigated based on the Lyapunov theorem. Then, the switching control system of a hybrid electromagnetic actuator is designed. Finally, a linear electromagnetic actuator and a passive damper are taken as comparison objects, and comparative bench tests, including a dynamic performance test and an energy consumption test, are conducted. The test results show that the hybrid electromagnetic actuator with mode-switching control can balance the dynamic performances and electrical energy consumption effectively.