汽油机进气道油膜模型参数辨识算法的研究

为寻求较为理想的油膜模型参数辨识算法,从随机误差相关性出发,分别推导最小二乘辨识和基于夏氏偏差修正法辨识的计算过程;并以燃油阶跃补偿标定试验为参考,比较了最小二乘辨识和基于夏氏偏差修正法辨识效果.结果表明考虑相关随机误差的夏氏辨识在辨识效果上明显优于最小二乘辨识,且比起受工况及温度影响较大的燃油阶跃补偿标定试验在数据离散程度方面有一定的优势.基于辨识算法对油膜模型参数的辨识结果相对而言更贴近真实模型参数值,为油膜模型参数辨识提供了理论依据.

Research of Parameter Identification Algorithm of Intake Port Fuel Film Model for Gasoline Engine

To find a more ideal parameter identification algorithm of intake port fuel film model,the identification process of Least Square Method and Charpy Deviation Amendment Act based on the relativity of random inaccuracy are deduced.Based on Step Fuel Compensation Calibration Test,the identify results of Least-Squares-based identification with Charpy-based identification are compared.Results show that the identify result based on Charpy Deviation Amendment Act is better than that based on Least Square Method,an...