基于人体响应的行走机械换挡品质评价

Shift Quality Evaluation of Mobile Machinery Based on Human Body Response

从人的运动感知物理基础出发研究了人对换挡冲击的感知特性,得出人主要通过对人体绝对加速度和相对车体位移的感知来感受换挡冲击的结论。建立了在已知车体运动下求解人体响应的动力学模型。对具有典型特征的车体运动和实测车体运动激励下的人体响应进行仿真,结果表明,人体运动与车体运动不同,两者时间历程及加速度最大值等评价指标有显著差别。使用车体运动参数进行换挡品质评价不能准确反映人的感受,基于人体响应才能准确评价人对换挡冲击的感受。

The perception characteristics of human to shift impact was studied from the physical basis of human＆#39;s motion perception. The conclusion revealed that human＆#39;s feeling under shift impact is determined by human＆#39;s perception to absolute acceleration of human body and relative displacement between human body and the vehicle. A dynamic model that can solve human body response under given vehicle motion was established. Vehicle motion with typical characteristic and human body response under vehicle motion were simulated, the results show that vehicle motion and human body motion have huge differences, the evaluation criteria, i.e. time history and maximum acceleration of human body and vehicle differ greatly. Human＆#39;s feeling under shift impact can be evaluated precisely based on human body response rather than vehicle motion parameters.