汽车悬架整车动力学模型的参数辨识

Parametric identification of a vehicle suspension dynamic model

根据汽车悬架动力学特性的理论知识,建立了七自由度汽车悬架整车动力学方程。推导了悬架动力学方程从惯性物理坐标到传感器坐标的变换,利用执行器作为激励,采用时域辨识方法对参数进行辨识。根据最小二乘估计递推算法,建立了从执行器到传感器的汽车悬架整车动力学模型,实现了悬架模型在线参数辨识,为七自由度汽车悬架的振动主动控制打下基础。

According to the theoretic knowledge of dynamics characteristics of a vehicle suspension, dynamic equations of a 7-DOF vehicle suspension were established. The dynamic equations were converted from an inertial physical coordinate system to a sensor coordinate system, and parameters were identified with the time-domain identification method and actuators were used as excitations. According to the least square estimation recursive algorithm, the vehicle suspension dynamic model was built from actuators to sensors, and the online parametric identification of the suspension model was realized. The results laid a foundation for the vibration active control of the 7-DOF vehicle suspension.