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由于广泛采用轻质材料,大型飞机的结构柔性使得控制系统和结构动力学之间存在不可避免的耦合现象,控制器设计必须同时考虑结构柔性对系统反馈的贡献,并满足飞行品质、鲁棒性等目标.提出了一种利用刚体飞行动力学模型和包含弹性模态的高阶模型设计满足多种目标的控制器综合方法,首先由刚体模型设计静态输出反馈参数,满足动态响应、飞行品质和抑制阵风扰动等要求,在此基础上利用已获得的静态反馈参数针对高阶模型设计H∞回路成形控制器,实现对结构模态的抑制,并满足系统的鲁棒性需求.仿真结果表明:设计方法能够充分利用包含弹性模态的大型飞机飞行动力学模型的特点,满足结构模态抑制和鲁棒稳定裕度等多种需求.
Due to the extensive adoption of lightweight materials, the structural flexibility of large aircraft makes the inevitable coupling between control system and structural dynamics. The controller design must also consider the contribution of structural flexibility to system feedback and satisfy the flight quality, robustness And so on.A controller synthesis method is proposed to design multi-objective controller by using rigid body flight dynamics model and high-order model with elastic modal. First, the static output feedback parameters are designed by rigid body model to meet the requirements of dynamic response, flight quality and Based on which the H∞ loop forming controller is designed for the high-order model by using the static feedback parameters obtained, so as to suppress the mode structure and meet the system robustness requirements.The simulation results show that: The design method can take full advantage of the characteristics of the large aircraft flight dynamics model with elastic modal to meet the various needs of structural mode suppression and robust stability margin.