电磁阻尼器惯性质量对汽车馈能悬架减振性能的影响

A precise state space model of regenerative suspension system including inertial mass is established to study the influences of the damper's inertial mass on the vibration insulation performance and energy recovery performance of the vehicle regenerative suspension system and to optimize the electromagnetic damper selection. The damper's inertial mass is derived from the dynamic equation of the vehicle suspension system, and the acceleration of the suspension system, the suspension travel and the wheel's dynamic deformation are used as outputs of the system. The influence of the inertial mass level on the main performance of the suspension system is analyzed by using the frequency domain transmission characteristics of the outputs of the state space model system. Simulation results show that the average energy recovery power of the suspension system decreases with the increase of the equivalent inertial mass of the damper. Although the amplitude-frequency transmission characteristics of the main performance indicators in the low frequency band are slightly improved, the transmission characteristics in the middle frequency band deteriorate seriously, and excessive inertial mass of the damper will cause the overall performance of the suspension system to deteriorate. The simulation results are verified on a 1/4 suspension system bench test. Results show that under the same excitation condition, up to 44% attenuation of energy recovery power is caused by the inertial mass of the electromagnetic damper and that higher-level inertial mass causes the transmission performance of the key performance indicators of the suspension system to produce different degrees of deterioration in the middle frequency band, the resonance frequency is slightly shifted forward, and the overall performance of the suspension system deteriorates. The experimental results verify the correctness of the simulation results.