单滚筒底盘测功机寄生摩擦阻力测量方法研究

Study on the measurement method of single drum chassis dynamometer parasitic friction resistance

针对单滚筒底盘测功机寄生摩擦阻力的获取,在不同加速度下对测功机进行加载滑行,对测功机的基础惯量进行标定,然后采用空载滑行法,根据基础惯量、速度区间与滑行时间得到各测量速度点的寄生阻力值,再将其拟合成二次曲线。最后,采用等速法加载不同惯量值对曲线进行验证,结果表明:采用此方法所得出的测功机寄生阻力计算模型满足试验要求,具有较高的准确度。

In order to obtain the parasitic friction resistance of single drum chassis dynamometers,loaded sliding tests for dynamometer under different acceleration conditions was conducted and the basic inertia of the dynamometer was calibrated. Then,no-load sliding method was used to acquire the parasitic resistance at each measurement speed point according to the basic inertia, velocity section and sliding time. After that, the parasitic resistance values were fitted into a quadratic curve. Finally,the curve was verified by loading different inertia values at a constant speed. The results show that the calculation model obtained for dynamometer parasitic resistance obtained from this method can satisfy the testing requirements and has high accuracy.