多输入气动伺服弹性系统抗阵风不灵敏性研究

ANALYSIS OF INSENSITIVITY TO GUST FOR MULTI-INPUT AEROSERVOELASTIC SYSTEM

针对飞机多输入 /多输出气动伺服弹性系统的抗阵风不灵敏性进行理论分析与计算验证。对于耦合的多回路飞行控制系统 ,建立弹性结构、非定常气动力和控制系统构成的气动伺服弹性分析模型 ,根据现代控制理论中的鲁棒分析技术 ,以系统回差矩阵的奇异值理论为基础 ,应用系统抗干扰不灵敏性的判据 ,确定气动伺服弹性系统对阵风外干扰保持不灵敏性的能力。以某型飞机横侧向耦合控制系统为对象 ,采用 Dryden谱形式的大气紊流模型作为外部阵风干扰 ,对系统的不灵敏性及阵风响应进行计算。

The insensitivity to gust for multi input and multi output aeroservoelastic systems of the aircraft is studied. For a coupled multiloop flight control system, an aeroservoelastic analytic model, including flexible structure, unsteady aerodynamics and flight control system, is set up. On the basis of singular value of return different matrix in robust technique of modern control theory, using the criteria of insensitivity to disturbance, the ability keeping insensitivity to gust for aeroservoelastic system is determined. The sample is an aircraft with a lateral coupled control system and the gust is atmosphere turbulence with Dryden model. The insensitivity to gust is calculated and validated with the response of the aircraft to the gust.