Multiple models adaptive decoupling controller applied to the wind tunnel system

In this paper, a multivariable multiple models direct adaptive decoupling controller is presented to improve the transient response when the parameters of the system change abruptly. The controller is composed of multiple fixed controller models and two adaptive controller models. The fixed controller models are derived from the corresponding fixed system models directly and guaranteed to cover the controller parameter set, without partitioning the controller parameter set again. The adaptive controller models adopt the direct adaptive algorithm to reduce the design calculation. By the choice of the weighting polynomial matrix, it not only decouples the system dynamically, but also places the poles of the closed-loop system arbitrarily. The global convergence is obtained. The significance of the proposed method is that it is applicable to a MIMO system to reduce the effect of the interactions on the transient response greatly. Finally, several simulation examples in a wind tunnel experiment are given to show both effectiveness and practicality of the proposed method.