电磁馈能悬架非线性阻尼特性仿真分析

摘要

A nonlinear damping characteristic for regenerative suspension based on the torque-speed char-acteristic of regenerative motor and traditional linear damping characteristic is proposed and the influences of opening speed and the initial speed of inadequate damping interval on vibration attenuation performance are analyzed. By an-alyzing the sprung mass acceleration response of single DOF linear suspension model, the effect of initial opening speed on vibration attenuation performance is obtained. For suppressing the peak acceleration response caused by entering constant damping interval, the relative speed transfer characteristic of linear suspension model is investiga-ted, with the adjustment coefficient for initial opening speed obtained. The results of simulation show that reasonable opening speed can greatly improve the transfer characteristic of regenerative damper, while the initial speed of inad-equate damping interval has no much effect on peak response for harmonic excitation.%提出了一种基于馈能电机转矩转速特性和传统线性阻尼特性的馈能悬架非线性阻尼特性，分析开启速度和阻尼不足区初始速度对减振性能的影响。通过对传统的单自由度线性悬架模型的簧载质量加速度响应分析，得出初始开启速度对其减振性能的影响。为了抑制进入恒阻尼区后导致的加速度响应峰值，对线性模型中的相对速度传递特性的研究，得出初始开启速度的调整系数。仿真结果表明，合理的开启速度能极大地改善馈能减振器的传递特性，阻尼不足区初始速度对谐波激励时的响应峰值影响并不大。