用时间序列方法识别内燃机缸内气体压力

Identification of Cylinder Pressure of Internal Combustion Engines Using Time Series Method

本文对时间序列方法在监测内燃机缸内气体压力中的应用进行了研究。文中引入了“虚拟系统”的概念,从而通过气缸盖表面振动信号的时序模型(ARMA模型)求出了实际缸盖系统的传递函数,并成功地给出了利用内燃机表面振动信号重建缸内气体压力的方法,为内燃机运行中的状态监测提供了一种有效的手段。

This paper deals with an investigation in monitoring the cylinder pressure of internal combustion engines by means of time series method. The concept of 'assumed system'is introduced. And with this concept, the transfer function of the real Cylinder head structure is calculated via the time series models (ARMA models) of vibration signals of the cylinder head. Then the method of reconstructing the gas pressure inside the cylinder using the engine vibration signals is proposed. This offers an effective means for monitoring the condition of internal combustion engines.