姜晓军，杨建国，周天鹏

（哈尔滨工业大学（威海），山东 威海 264200)

    摘要：在汽车发动机悬置系统设计过程中，动力总成惯性参数测量是一个必要环节，其中包括动力总成的质心，转动惯量和惯性积测量。本文提出一种三线扭摆结合三维扫描仪和发动机三维数字模型的动力总成质心与惯性参数的测试方法，其主要特点是采用三维扫描仪扫描测试中的动力总成，将扫描数据与动力总成的三维实体模型相比较来获得相关角度，可以避开复杂的坐标变换，简化了数据处理；另外可实现发动机和变速箱的分体测试，由于被测物比总成重量轻，所以测试操作方便，而且对悬吊装置的强度要求低。对实验台的标定表明，实验台具有较高的实验精度；对某型汽车动力总成的质心与惯性参数测量与计算表明，该方法简易、可靠。

    关键词：动力总成；三线扭摆；三维扫描仪；惯性参数测量

Abstract: During the design of automobile engine mounting system, it is a necessary step to measure powertrain inertial parameters including centroid, moment of inertia and product of inertia. In this paper, an experimental technique that is used to measure the inertia parameters of powertrain basing on 3D scanner and three-wire pendulum is presented. With the help of 3D scanner and 3D model, the included angle of torsion shaft and the powertrain coordinate system can be easily obtained without complicated coordinate transformation. The split test of the engine and transmission box enables the test process more flexible. Meanwhile, it reduces the strength requirement of suspension device. The calibration of the experimental device shows that the experimental bench has a high precision. The measurement of inertia parameters of the powertrain of a certain vehicle shows that the method is simple and reliable.

  Key Words: Powertrain; Three-Wire Pendulum; 3D Scanner; Inertia Parameters