主动气动弹性机翼的颤振主动抑制与阵风减缓研究

多输入／多输出系统的颤振主动抑制与阵风减缓是主动气动弹性机翼技术的重要研究方面。以一个带有两个后缘控制面的三角机翼风洞模型为研究对象，采用LQG／奇异值控制理论设计颤振主动抑制与阵风减缓的鲁棒控制律，对组成的闭环系统进行控制仿真。并从闭环稳定特性、阵风响应减缓效果、作动器功率需求和控制律的降阶四个方面提出评估指标，对闭环系统进行工程特性评估。结果表明，设计所得到的控制律能应用于工程实践。

INVESTIGATION ON ACTIVE FLUTTER SUPPRESSION AND GUST ALLEVIATION FOR AN ACTIVE AEROELASTIC WING

Active aeroelastic wing (AAW) technology is a new idea in modern aircraft design, and active flutter suppression and gust alleviation for multi input/multi output systems is the main research aspect in AAW. Active flutter suppression and gust alleviation controller was designed for a delta wing model with two trailing edge control surfaces, by using linear quadratic Gaussian (LQG)/robust control theory. Due to considering the minimum singular value of the system return difference matrix as constraint, blindness in traditional design method is avoided. Indexes were put forward based on robust stability, gust alleviation effect, required energy of actuators and reduction of the controller, and the closed loop system was evaluated by numerical analysis. Simulation results indicate that the controller satisfies the requirements of engineering and can be used in practice.