电动汽车馈能式主动悬架在循环工况下的仿真研究

Simulation Research on Energy-regenerative Active Suspension for Electric Vehicle Based on Driving Cycle

采用前向仿真和后向仿真相结合的思想,建立了基于循环工况的1/4馈能式主动悬架仿真系统。通过模糊PID控制器来控制电机的四象限运行,并考虑了电机、电池所造成的功率损,完成悬架主动力的输出以及能量的回收。选取了美国城市循环工况UDDS进行馈能式主动悬架的平顺性与经济性的仿真分析。仿真结果表明:相比于传统被动悬架,基于模糊PID控制的馈能式主动悬架能较好地改善汽车行驶平顺性,其在UDDS工况下的车身垂直加速度均方根值改善了32.43%;相比于传统电磁式耗能主动悬架,馈能式主动悬架在该工况下的节能效果达到了24.88%。

The simulation model of1/4energy-regenerative active suspension was built with the forward and backward simulation method based on the driving cycle.The4-quadrant driving of the motor was adjusted to control the active force and achieve the energy recovery by the fuzzy-PID controller under the condition that the power loss caused by the motor and energy storage was taken into account.The simulation was carried out in the UDDS driving cycle to analyze the performance of ride comfort and economic.The simulation results show the energy-regenerative active suspension based on fuzzy-PID control strategy can improve the ride comfort performance effectively and the RMS value of body vertical vibration acceleration was reduced by32.43%compared with the traditional passive suspension,and the electric energy consumption was reduced by24.88%in contrast with the electromagnetic active suspension in the UDDS driving cycle.