刚性体惯性参数识别方法研究  

Identification Method of Inertia Parameter for Rigid Body

作　　者：郭晓航 王攀[1] 邓兆祥[1,2] 罗渊 GUO Xiaohang;WANG Pan;DENG Zhaoxiang;LUO Yuan(School of Automotive Engineering,Chongqing University Chongqing,400044,China;State Key Laboratory of Vehicle NVH and Safety Technology Chongqing,401122,China;Chongqing Chang′an Automobile Company Limited Chongqing,400023,China)

机构地区：[1]重庆大学汽车工程学院,重庆400044 [2]汽车噪声振动和安全技术国家重点实验室,重庆401122 [3]重庆长安汽车股份有限公司,重庆400023

出　　处：《振动．测试与诊断》2021年第6期1221-1225,1244,共6页Journal of Vibration,Measurement & Diagnosis

基　　金：重庆市技术创新与应用发展专项资助项目(cstc2019jscx-zdztzxX0042)。

摘　　要：为快速精确获取刚性体惯性参数,对基于频响函数的刚性体惯性参数识别方法展开了研究。首先,对惯性参数识别算法进行了研究,并借助多体动力学仿真分析进行了验证;其次,深入分析了影响该识别方法精度的主要因素和影响规律,分析表明激励点和响应点的坐标误差以及激励方向对识别精度影响较大;最后,完成了惯性参数识别实验装置的设计,并进行实验研究。实验结果表明:刚体质量以及质心位置识别精度在4%以内,转动惯量以及惯性积识别精度均在10%以内,识别精度和效率满足工程实际需求。In order to obtain the rigid body inertia parameters quickly and accurately,the identification method of the inertial parameters of rigid bodies based on frequency response functions is studied.Firstly,the inertial parameter identification algorithm is studied,and verified by multi-body dynamics simulation analysis.Then the main factors are deeply analyzed,which affects the accuracy of the identification method and the law of influence.The analysis shows that the coordinate error of the excitation point and the response point and the excitation direction have a great influence on the recognition accuracy.Finally,the design of the inertial parameter identification experimental device is completed,and the experimental research is carried out.Experimental results shows that the rigid body mass and centroid position recognition accuracy is within 4%,and the moment of inertia and inertial product identification accuracy are all within 10%.The recognition accuracy and efficiency meet the actual needs of the project.

关 键 词：振动 刚体 参数识别 频响函数 

分 类 号：TH113.1[机械工程—机械设计及理论]