瞬态热流加载模糊PID控制系统设计

Fuzzy PID control design for Transient Heat Flux

为了实现飞行器气动热与结构热耦合的热流计算和加载,本文通过将气动加热数值计算程序内嵌到热流的控制程序中,用实测的结构表面温度作为数值计算的边界条件,进行气动加热计算并进行热流加载。热流加载采用模糊PID控制算法,控制参数能够自动调整到最佳值,提高了热流加载质量。本控制系统基于VisualBasic进行编程,控制系统能够根据飞行器的飞行轨迹,进行实时气动加热的热流计算和热流加载。

To solve the problem of coupled aeroheating and thermal structural,embedded the aerothermal program into control program of the heat flux. Then calculate the heat flux with the temperature measured on the surface of the structure as a boundary condition, and load it. Heat fluxes using fuzzy PID control and controls parameters can be automatically adjusted to the best value, which improve the quality of the heat load. This control system is developed in Visual Basic, which can calculate aeroheating and load heat flux, in accordance with hypersonic vehicle＇s trajectory.