基于滑移-黏滞摩擦机理的制动系统模型开发

Development of brake system model based on slip-stick friction theory

研究了制动近零状态和制动抱死状态下制动力矩的求解理论,开发了一种新的制动系统模型。根据制动过程中制动盘与制动钳(制动鼓与制动蹄)之间的运动状态,基于滑移-黏滞摩擦机理,建立了动、静两种摩擦状态下的制动力矩求解算法。开发了独立的制动模型子程序,并在ADAMS软件中进行应用。仿真结果表明:建立的制动系统模型比原ADAMS中的模型可以更准确地仿真车辆平路制动停车工况和坡道制动停车工况,对于汽车的仿真分析具有应用价值。

A new braking system model was built from a study on the solution method of the friction brake torque under the conditions of braking to near zero speed and braking lock. According to the motion state between the brake disc and the brake pliers（for the disc type brake） or the brake drum and the brake shoes（for the drum type brake）, a solution algorithm of the brake torque under the static and dynamic friction states was proposed based on the slip-stick friction theory. A brake system model subroutine was developed and embedded in ADAMS. The simulation results show that this model can simulate the vehicle braking and parking conditions on the horizontal road and the ramp more accurately than that of original ADAMS. the suggested approach is of value for the vehicle dynamic simulation.