静不稳定倾斜转弯导弹飞控系统的设计与分析

本文给出了烦斜转弯(BTT)导弹简化的数学模型,研究了BTT导弹大攻角,强耦合和非线性的特点,分析了航向静不稳定弹体的气动特性,应用经典控制理论,提出了这类导弹飞控系统的设计方法和设计目标。在设计初期,暂不考虑交叉耦合作用,三通道独立设计,同时通过侧滑角反馈使航向静稳定。本文通过协调控制技术减小三通道的交叉耦合作用,提出了三种协调控制方法。最后,本文以某型BTT-90导弹为对象,给出了整个飞控系统的设计过程,进行了非线性数字仿真。仿真结果表明,设计达到了预期的目标。

Design and Analysis of Flight Control System for Statically Unstable Bank-to-Turn Missile

The simplified mathematical model for bank-to-turn (BTT) missile is presented. Based on the research of the characteristics of large attack-anagle, strong cross-coupling and nonlinearity of BTT missile,and the analysis of the aerodynamics of an yaw statically unstable missile,the design methodology and design goals for this kind of BTT missile flight control system are discussed using classical design techniques. Three channels are designed independently without conerning the cross-coupling effects,and the yaw static stability is achieved by the feedback of sideslip angle in the beginning of the design. The coordinated control techniques are employed to reduce the cross-coupling effects within three channels. Finally,the design procedure of flight control system for a BTT-90 missile and non-linear digital simulation are performed. The results of simulation show that the expected design goals have been achieved.