制动参数对制动系统稳定性的影响

以汽车的制动盘与摩擦片构成的制动系统为研究对象,建立了基于Stribeck摩擦模型的制动系统动力学模型。采用数值仿真的方法就制动系统的初速度、制动压力、阻尼和刚度等制动参数对系统稳定性的影响做了定性的分析,提出了提高系统稳定性的方法。研究结果表明:随着制动初速度的增大,系统的振动幅值也变大,但系统达到稳定状态的时间越短;系统的振动幅值随着制动压力的增大而减小,适当地提高压力可以减小振动;系统的阻尼越大,系统越快达到稳定状态;系统的刚度越大,系统达到稳态运动所需的时间就越长,达到稳定前振动的幅值随着刚度的增大而变小。

Influence of Braking Parameters on the Stability of Braking System

A braking system consisting of brake discs and friction plates is studied. The kinetic model is established based on the Stribeck friction model. The impact of the initial velocity, brake pressure, damping and stiffness on braking stability is studied by numerical simulation. Then, methods to improve braking stability are proposed. The results show that the vibration amplitude increases with increasing initial velocity, but less time is needed for the system to reach stability. The vibration amplitude decreases with increasing braking pressure. Vibration amplitude can be reduced by appropriately increasing the pressure. The greater the damping, the faster the system reaches stability. The greater the stiffness, the slower the system reaches stability. The vibration amplitude decreases with increasing stiffness before the system reaches a steady state.