利用双目标优化寻求颤振抑制控制律

本文对一个三角机翼/外挂系统的颤振主动抑制进行了系统的研究。在理论上,对如何应用现代控制理论设计优化控制律进行了探讨;对非定常气动力拟合的Pade矩阵近似作了改进;提出了用理想极点和二次型性能指标进行双目标优化来确定加权矩阵的思想;在实现上,用状态观测器和单秩法极点配置两种方法设计了输出反馈控制律。风洞实验结果表明:用本文的方法所综合的控制律是合适有效的,成功地使机翼/外挂系统的颤振速度提高了15.7％,与理论计算结果吻合良好。

DESIGN OF ACTIVE FLUTTER SURPPRESSION CONTROL LAW USING A DUAL OPTIMIZATION METHOD

Researches on the active flutter surppression for a deltaic wing/store system was performed.The method to design the optimal control law with modern control theory are explored.The martrix Fade approximation for getting the unsteady aerodynamics fit are improved further.The idea that a dual targets optimaization is conducted by use of ideal poles and quadratic cost function to determine the weighting matrices are put forward.In practice,both through the state observer and pole assignment with single rank method,the output feedback control law is determined.The results of wind tunnel experiments show that the control law synthesized herein is adaptable and ef f icient,the flutter speed of this wing/store system increases about 15.7% successfully.Calculated results have a good agreement with the wind tunnel experimental data.