基于遗传算法的发动机气路性能模型修正研究

Engine Gas Path Performance Model Modification Based on Genetic Algorithm

确定部件修正参数和目标性能参数作为模型修正基础,结合稳态模型的平衡方程,构造修正发动机非线性模型的代价函数,修正发动机稳态模型。计算了在不同工况修正后的特性参数,并与用影响系数矩阵方法所得结果进行对比,经遗传算法修正后参数精度有了较大提高。利用部件修正参数组合对发动机稳态模型进行修正,其结果表明敏感性参数在模型修正中起关键作用。所用修正方法对发动机性能模型修正、提高模型精度有一定指导意义。

Making component modified parameter and objective performance parameter as basis of model modification, stable engine model was modified by establishing cost function of engine nonlinear model modification with balance equation of stable model. Comparison of modified characteristic parameter at dif- ferent work conditions with modified results by influence coefficient matrix method showed that accuracy of parameters modified by genetic algorithm was enhanced greatly. Stable engine model was modified by using component modified parameter. The results indicated that sensitive parameter played key role in model modification. The method is referential to engine performance model modification and model accuracy en- hancement.