汽车惯性参数测量试验台运动学分析与计算方法  

Kinematic Analysis and Calculation of Automobile Inertial Parameters Measuring Device

作　　者：郭孔辉[1] 丁金全[1] 许男[1] 姚麒麟[1] 袁显举[2] 

机构地区：[1]吉林大学汽车仿真与控制国家重点实验室,长春130025 [2]华南理工大学机械与汽车工程学院,广州510641

出　　处：《农业机械学报》2014年第6期1-6,共6页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家重点基础研究发展计划(973计划)资助项目(2011CB711200)

摘　　要：提出一种汽车惯性参数测量试验台,通过模拟汽车的侧倾、俯仰和横摆运动测量汽车的惯性参数。在对试验台的结构、控制方案和解算原理研究的基础上,采用多体动力学方法对试验台的运动学特性进行了分析,推导了定轴转动的惯性参数解算公式,并根据试验测量数据进行惯性参数的计算;在试验过程中,由于在主模态运动过程中会产生一定的副模态运动,为了验证定轴转动解算公式的精确性,建立了考虑试验台耦合运动的定点转动惯性参数解算公式,根据试验测量数据利用非线性最小二乘法对惯性参数进行辨识,辨识结果与利用定轴转动解算公式求解值和理论值进行了对比。结果表明:汽车惯性参数测量试验台的解算精度满足设计要求。A new automobile inertial parameters measuring device was designed to measure inertial parameters by using motions simulation of automobile roll, pitch, and yaw dynamics. Based on examining the structure, control strategy, and solution principle of the measuring device, the kinematic characteristics of the test device were analyzed by using multi-body dynamics method. The solution formulas based on rigid body rotation about a fixed axis were induced and the inertial parameters were calculated according to the experimental data. Since the dominating modal motion could cause vice modal motion, the solution formulas based on fixed-point rotation of rigid body considering coupled motions of the test device were established to verify the induced formulas. According to the experimental data, the inertial parameters were estimated by using nonlinear squares method. The estimated inertial parameters were compared with the calculated values and theoretical values. The analyzed results indicated that the calculation accuracy of automobile inertial parameters measuring device met the design needs.

关 键 词：汽车 惯性参数测量试验台 运动学分析计算方法参数辨识 

分 类 号：U461[机械工程—车辆工程] U467.524[交通运输工程—载运工具运用工程]