基于Matlab的时域低阶等效系统的实现方法

基于Matlab软件实现了一套完整的时域低阶等效系统拟配方法。该方法以离散飞行试验数据作为数据源,包含数据预处理、等效系统拟配和纵向飞行品质分析三大模块。等效系统拟配分别应用了遗传算法加最小二乘法的混合寻优算法和多次循环的最小二乘算法。算例验证结果表明,以上两种方法均取得了良好的拟配效果。通过对实际飞行数据进行处理分析,表明所建立的时域低阶等效系统方法使用方便,计算高效,同时具有较高的可靠性。

Implementation method of time-domain low order equivalent system based on Matlab

A complete method for analog-matching of time-domain low order equivalent system was achieved based on Matlab.The method,including three main modules:data preprocessing,equivalent system matching and longitudinal flight qualities analysis,used discrete flight test data as data source.Two algorithms were available in the equivalent system matching process:one was a combination of genetic algorithm and least-square-method,the other was a multi-cycling least-square-method.The excellent matching results achieved in the calculating examples showed that these two algorithms had obtained good matching effect.It finally proved that the method proposed in this paper is easy to use,efficient and with high reliability through the processing and analysis of the real flight test data.