内燃机轴系扭振测试方法研究

采用A/D采样拟合法,较详细地分析了基准电平的取值范围、循环内平均次数及采样频率等因素对角振动测量精度的影响,并提出了一组适合工程实际需要的参数作为采集及信号预处理参数。通过与A/D高频计数法的分析结果相对比,结果表明:该组参数设定合理,既能降低测量仪器的硬件成本和测试数据的分析时间,又能满足工程应用所需的测量精度,便于现场的实际推广应用。

Study on Testing Method of Crankshaft Torsional Vibration

With the A/D sampling fitting method,the influence of references voltage range,average times per cycle and sampling frequency on angular vibration measuring accuracy were analyzed in detail.The parameters that could meet the engineering requirement were put forward and taken as the sampling and signal preprocessing parameters.After comparing with the results from the A/D high frequency notation analysis,the results show that the parameters can not only reduce the cost of measuring equipments and the analyzi...