Analysis and Research on Vibration Characteristics of Reclaiming Energy Suspension Based on Adjustable Load 2019-01-0453
Wheel-side drive electric vehicle is electric vehicle that uses wheel motor to drive wheel directly. Because of the introduction of the hub motor, the quality of the vehicle's non-spring load increases obviously, not only affects the ride comfort, but also reduces the driving safety. Active suspension can significantly improve overall vehicle performance, but high energy consumption has been one of the main factors restricting its promotion in the market. The use of an electromagnetic linear motor as the actuator of the active suspension provides an opportunity for this contradictory solution. Using the principle of electromagnetic induction, the linear motor can transform the vibration energy of the vehicle into the electricity that can be directly used by the vehicle, and realize the purpose of improving the vehicle performance while reducing the energy consumption. In order to realize that purpose, a dynamic model of vehicle vertical 7-DOF active suspension is established in this paper. Based on optimal control theory, a load adjustable reclaiming energy suspension controller is designed. The relevant parameters of suspension are optimized by particle swarm optimization algorithm and simulation of the whole system under the 50km/h C-Class road driving. The results show that the feed-energy performance and vehicle dynamic performance of the suspension are greatly improved after optimization; the feedback energy controller based on resistance control can not only improve the vehicle dynamic performance but also recover the vibration energy effectively.