Abstract: In order to avoid the conservativeness of control law design results, considering the wide envelope, non-linearity, uncertainty and unmodeled dynamic characteristics of ramjet, the design of engine multivariable control algorithm based on μ synthesis method is studied. An engine model is established, the selection of nominal model and the setting and selection of weighting function are given, and the μ synthesis controller is obtained by D-K iteration. The numerical simulation results show that the multi-variable robust controller based on the μ synthesis design meets the control performance requirements in the wide envelope range of the engine, verifies the stability and robustness of the control algorithm, realizes the function of a single controller to control multiple engine state points, and avoids the complex dynamics parameter adjustment process in traditional control mode.

Key words: Ramjet;Multi-variable control;μ synthesis;D-K iteration

摘要： 为避免控制律设计结果出现较大的保守性，考虑冲压发动机的宽包线、非线性、不确定性和未建模动态特性等问题，研究了基于μ综合方法的发动机多变量控制算法设计。建立了一种发动机模型，给出了标称模型的选择和权函数设置与选取，用D-K迭代获得了μ综合控制器。数值仿真验证结果表明：基于μ综合设计的多变量鲁棒控制器在发动机宽包线范围内均满足控制性能指标要求，验证了控制算法的稳定性和鲁棒性，实现了单个控制器控制多个发动机状态点的功能，避免传统控制模式中复杂的动态调参过程。

关键词: 冲压发动机;多变量控制;μ综合;D-K迭代