内燃机示功图自适应性滤波处理的研究

A Study on Adaptive Filtering Methods of Indicator Diagrams in Internal Combustion Engines

对内燃机气缸内压力的测量误差进行了理论分析和实验研究。发动机示功图通道效应误差可以近似认为是随机信号,因此可以应用离散随机信号最优滤波理论来消除通道效应误差。设计的自适应抵消器对于消除通道效应误差取得了良好的效果。

A study of measurement errors of the cylinder pressure in internal combustion engines is carried out theoretically and experimentally. It is considered that indicator passage error is stochastic approximately, so that it may be canceled by using the optimum filtering theory of discrete random signals. An adaptive canceller developed in this paper makes excellent filtering effect when it is used to cancel the indicator passage error.