柴油机气缸盖振动特性的时间序列模型

Time Series Modeling of Vibration Characteristics of Diesel Engine Cylinder Head Structure

用时间序列法研究了柴油机气缸盖的动态特性。通过引入虚拟系统的概念 ,利用缸盖表面振动信号的自回归滑动平均模型 (ARMA模型 )求出了实际缸盖系统的传递函数 ,并将其应用于重建缸内气体压力曲线。为柴油机的振动噪声控制、状态监测 ,以及缸内气体压力的识别提供了一种有效的方法。

This paper conducts an investigation into the vibration characteristics of diesel engine cylinder head by means of time series method. With the concept of 'Assumed System', the transfer function of real cylinder head system is established using the ARMA models of surface vibration signals of cylinder head. Then this transfer function is successfully used to reconstruct the gas pressure trace inside the cylinder. This offers an effective means for diesel engine vibration and noise control, condition monitoring, and cylinder pressure recognition.