中文摘要：

轮胎力传感器（Wheel force transducer，WFT）采用串联方式传递地面对轮胎的作用力，增加轮胎质量4～10kg，此附加质量对WFT本身测量精度和整车稳定性会造成影响。选择8梁和4梁弹性体两种典型电阻应变WFT，对弹性体、未改制轮辋、弹性体＋改制轮辋装配体进行模态对比分析。然后量化由轮胎旋转形成的离心力和由弹性体外环垂直运动惯性力形成的附加变形梁拉压变形。基于15自由度整车仿真模型进行90km／h匀速、160°转向盘角阶跃输入对比试验，根据质心侧偏角和横摆角速度分析WFT附加质量对汽车稳定性的影响。结果表明，弹性体基频振动中变形梁的拉伸和弯曲变形，以及垂直运动惯性力形成的附加变形梁拉压变形是形成WFT系统测试误差的主要因素；WFT安装后会改变整车的稳定性，增加响应延时。

英文摘要：

The wheel force transducer（WFT） delivers the forces serially from road to tire and adds 4 kg to 10 kg mass to whole wheel, so how the additional mass affects the measuring precision of WFT and the stability of whole vehicle should be analyzed quantitatively. Two resistance strain gauge WFTs with 8 beams and 4 beams are employed respectively, and the model analysis are conducted for elastic body, original rim, the assembly of elastic body and modified rim. Then the additional deformation of elastic beam, motivated by the rotation centrifugal force of whole wheel and the vertical motion inertia force of elastic body outer ring, are analyzed comparatively. 15 DOF whole vehicle model is developed and 160° hand-wheel angle step input simulations with 90 km/h uniform speed are conducted, for quantifying the effect of WFT on vehicle stability based on sideslip angle and yaw rate. The research shows that the main factors increasing the measurement errors of WFT are elastic beam＇s stretch and bending deflection both in the 1st frequency vibration of elastic body and motivated by the vertical motion inertia force of elastic body outer ring; the additional mass can change the vehicle stability and increase the response delay time.