基于约简遗传规划的航空发动机风车起动模型

针对高空风车条件下航空发动机起动性能估算问题,给出了用线参数模型描述发动机风车起动非线性过程的一般形式,利用约简遗传规划算法进行模型结构选择的思路,建立了基于约简遗传规划的航空发动机起动性能计算模型。以某型涡喷发动机为对象,在给定条件下,运用所建立的模型对该型发动机的风车起动过程进行了模拟,得到了起动性能的仿真结果。将仿真结果与试验数据和已有的部件级起动模型仿真结果进行了对比,验证了方法的正确性、可行性。

Aero-engine Windmilling Start Model Based on Parsimonious Genetic Programming

In order to solve the problem of engine starting characteristics calculation under windmilling condition, a generalized format of engine starting nonlinear mathematical model based on liner-in-parameters model was given. Techniques for model structure choose via Parsimonious Genetic Programming (PGP) were proposed, and a model to estimate engine windmilling starting characteristics based on PGP was brought forward. The estimation result of starting characteristics of certain turbofan under windmilling condition was computed by the new model. The comparison between estimation result and the existing characteristics which obtained through the component-level startup model validates the correctness and feasibility of the presented method.