车辆电液馈能型互联悬架特性分析

为了提高馈能悬架的能量回收效果及动力学性能，提出了一种车辆电液馈能型互联悬架结构。根据流量/压降之间的关系，建立了整车7自由度与电液馈能型互联悬架的耦合数学模型，通过正弦激励对车辆电液馈能型互联悬架进行阻尼特性和馈能特性仿真。以四轮随机路面为输入，分析悬架对车辆的平顺性、行驶稳定性的影响。结果表明：阻尼力、馈能功率与激励频率、幅值成正比，馈能功率波动与之成反比，馈能效率随幅值、频率增大而先增大后减小；随机路面下，与被动悬架相比，电液馈能型互联悬架的俯仰模式、侧倾模式均可以改善动力学性能的同时实现振动能量的回收。

Characteristics Analysis of Electro-hydraulic Energy Regeneration Interconnected Suspension

In order to improve the energy regeneration effect and dynamic performance of the energy regeneration suspension system, a new vehicle electro-hydraulic energy regeneration interconnected suspension structure is proposed in this paper. According to the relationship between flow and pressure drop of electro-hydraulic energy regeneration system, the coupled mathematical models oftheoverall vehicle with 7 degrees of freedom and the electro-hydraulic energy regeneration interconnected suspension system are established, and the damping characteristics and energy regeneration characteristics of the vehicle electro-hydraulic energy regeneration interconnected suspension are simulated through sinusoidal excitation. Takingstochastic road as input, the vehicle's ride comfort and driving stability are simulated and analyzed. The results show that the damping force and the energyregeneration power are proportional to the frequency and amplitude of excitation, and the fluctuation of the energyregeneration power is inversely proportional to them; the energyregeneration efficiency first increases and then decreases with the increase of the amplitude and frequency. On stochastic road, compared with passive suspension, the pitch mode and roll mode of the electro-hydraulic energyregeneration interconnected suspension can improve the vehicle'sdynamic performance while realizing the recovery of vibration energy.