滚筒试验台自适应防汽车偏摆系统的设计

为解决前轮驱动汽车在滚筒试验台上高速检测时偏摆问题,研究了转向驱动轮在滚筒试验台上高速运转时的受力情况和不稳定性,重点分析了在挡轮夹紧车轮后由于挡轮轴线与车轮中心的相对位置不同挡轮的轴向受力情况.采用基于SolidWorks平台的虚拟样机技术开发自动适应轮位和轮胎直径的防车偏摆挡轮系统,提出了利用传感器检测车轮作用在挡轮上的轴向分力,自动识别挡轮轴线与车轮中心的相对位置,从而使挡轮跟随车轮自动定位,在夹紧车轮防止车辆偏摆的同时,实现了挡轮与车轮之间无滑移的纯滚动.结果表明:该系统能够有效实现车轮与挡轮之间的纯滚动,减少了摩擦损耗,达到防止车辆偏摆的目的.

Design of automatic vehicle anti-deflection system based on chassis dynamometer

To solve the deflection problem of front-wheel-drive vehicle at high speed on chassis dynamo-meter,force characteristics and movement instability were studied.The axial force of blocking-wheel was selectively analyzed at different relative position between axle of blocking-wheel and center of vehicle wheel after holding wheels.Based on SolidWorks platform,virtual prototype technology was applied to design the vehicle anti-deflection blocking-wheel to automatically adapt the position and diameter of vehicle wheel.The axial force on blocking-wheel was detected by sensor.The relative position between blocking-wheel axial and vehicle wheel center was identified to automatically position blocking-wheel with vehicle wheel.The vehicle deflection was prevented without slipping by blocking-wheels.The result shows that the proposed system can effectively realize pure rolling without vehicle deflection and without friction loss.