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针对BTT导弹滚转角速度较大,俯仰和偏航通道具有强耦合、非线性的飞行控制特点,基于合理假设,通过线性化策略解耦得到相互独立的三通道弹体动力学模型,采用三通道独立设计的思想完成导弹三通道驾驶仪的设计。在此基础上,得到了三通道驾驶仪的闭环阶跃响应、开环系统幅相裕度以及导弹飞行参量的变化曲线,讨论了三通道控制系统响应快速性及频带匹配关系。根据仿真结果,得到了BTT导弹在满足滚转通道稳定性的前提下,尽量提高其频带,保持俯仰和偏航通道响应速度的一致性有利于消除通道间的耦合,增强BTT导弹的协调转弯能力。
Based on the assumption that BTT missile has large roll angular velocity, pitch and yaw channel have strong coupling and non-linear flight control, the three-channel projectile dynamic model independent of each other is obtained by the linearization strategy. The idea of independent design to complete the missile three-channel pilot design. On this basis, the closed-loop step response of the three-channel autopilot, the amplitude margin of the open-loop system and the variation of the missile’s flight parameters are obtained. The response of the three-channel control system and the matching of frequency bands are discussed. According to the simulation results, the BTT missile is found to be able to improve its frequency band while maintaining the stability of the rolling channel, keeping the response speed of the pitch and yaw channels consistent, which helps to eliminate the coupling between the channels and enhance the coordination turning ability of the BTT missile .