面向控制的高超声速飞行器推进系统代理建模

Control-oriented surrogate modeling for propulsion system of hypersonic vehicles

针对高超声速飞行器推进系统机理模型结构复杂、计算效率低、难以直接应用于控制器设计的问题,建立了面向控制的高超声速飞行器推进系统代理模型。首先,通过对机理模型进行分析,确定了代理模型的基本形式;然后,基于拟合优度的敏感度分析方法,将代理模型简化为最简形式;最后,采用自适应状态变量替换方法,对代理模型进行面向控制的简化。计算结果表明,自适应状态变量替换法可实现面向控制的模型简化;面向控制的代理模型能够达到较好的拟合效果。

A control-oriented surrogate model of the propulsion system of hypersonic vehicles has been built to solve the problem that the mechanism model is complex, low efficiency and difficult to apply to the controller design. Firstly, the fundamental form of the surrogate model has been determined by analy- zing the mechanism model. Secondly, the surrogate model has been simplified to the minimalist form by the sensitivity analysis method based on goodness of fit. Finally, the surrogate model has been simplified for control by the adaptive state variable substitution method. The calculation results show that the control-oriented surrogate model has been established, the control-oriented surrogate model could achieve a good fitting effect.