面向攻角变化的风洞流场模型预测控制器

目前已有的控制方法难以满足大飞机研制对风洞流场的精度要求.鉴于此,采用多变量模型预测控制方法设计流场控制器.为提高抵抗攻角扰动的能力,使用攻角变化量动态补偿静压的预测值.考虑风洞实验工况较多,采用多控制器融合方法解决新工况建立预测模型的问题.为保证控制器的实施,给出基于一阶惯性加滞后近似模型的控制器参数整定方法.通过实际吹风实验验证风洞预测控制器能够有效调节风洞流场,使吹风实验中流场参数的精度达到大飞机研制要求.

Orienting of attack angle based model prediction controller of wind tunnel flow

At present, the control accuracy of wind tunnel flow field is difficult to meet the large aircraft requirement. In this paper, a multivariable model prediction control is introduced to design the flow field controller. To improve the ability to resist attack angle disturbance in a wind tunnel test, dynamic compensation of the attack angle is proposed to improve the predictive value of static pressure. Considering more new test conditions, a multi-model fusion method is used to solve the problem of establishing the prediction model of the new working conditions. To ensure the implementation of the controller, a tuning method is given based on the first order plus dead model of flow field and the disturbance of attack angle. The tests result in 2.4m wind tunnel verifies that the proposed wind tunnel predictive controller can effectively regulate wind tunnel flow field to achieve high precision, which shows the effectiveness of the propoed controller.