基于多模型的风洞流场模型预测控制方法

Wind Tunnel Flow Field Model Predictive Control Based on Multi-model

风洞系统具有非线性、工况复杂的特性,文中针对风洞流场动态特性随工况而变化的特点,提出一种适合风洞系统的基于多模型的预测控制算法。首先按照风洞参数马赫数的变换建立多个模型,而后以模型输出误差为参数,建立有积分特点的性能目标函数,作为指标切换函数。依据性能指标函数选出与实际对象最接近的模型,并将此模型相应的控制器作为当前时刻的控制器。仿真结果证明,该方法应用于风洞系统是比较成功的。

There are some nonlinear and complex conditions in the wind tunnel system, in this paper, the dynamic characteristics of the wind tunnel flow field change with the change ot clltterem conuluons, so we propose a predictive control algorithm based on multi-model. First, according to the changes of Much （Ma）, which is one of the most important parameters in the wind tunnel, we have to create multiple models, then taking the model output error as the parameter, a performance index function with integral features is established as an index switching function. According to the performance index function, the model closest to the actual model is selected, and the corresponding controller are taken as the current time＇s controller. The simulation results show, the method applied to wind tunnel system is successful.