有约束的航空发动机加速最优控制

STUDY ON OPTIMAL ACCELERATION CONTROL OF CONSTRAINED JET ENGINE BASED ON NONLINEAR PROGRAMMING

本文研究了采用非线性最优化程序解航空发动机加速最优控制问题的方法。非线性最优化程序采用的约束变尺度法,发动机采用非线性模型。论文论述了目前发动机加速优化问题研究的一般情况;应用非线性最优化程序,采用非线性发动机模型解最优加速控制问题的基本方法;优化方法的选择问题;发动机模型的建立过程;应用约束变尺度法解最优加速控制问題的几个技术问题:对一些典型的计算结果进行了分析;最后提出了需进一步研究的几个问题。

Minimum time acceleration of aircraft turbojet engines are presented.These accelerations are calculated by using a nonlinear engine model based on average variable ratio of specific heat and a modified constrained variable metric nonlinear programming. The algorithm is used to find minimum time acceleration histories for a two spool turbojet engine. The results show that the optimal acceleration time is shorter by about 50% compared with the original one from idle to military without violating any constrained conditions.On the view of engineering, the selection of programming method and engine model are discussed. Some technical problem and typical results of calculation are analysed. Finally, the problems deserving further reseach are proposed.