SSB炸弹俯仰/偏航通道控制系统设计与仿真

Design and Simulation of Pitch/Yaw Channel Control System of SSB

SSB炸弹姿态控制系统是一个多种因素耦合的多输入多输出时变系统,俯仰/偏航通道的控制是整个姿态控制稳定性优化的难点问题。为了保证SSB炸弹在飞行过程中俯仰/偏航通道的稳定性以及具有期望的动态品质,给出了一种基于特征结构配置算法的全局状态反馈控制律设计。首先,在SSB炸弹飞行包线内选取有代表性的特征点,应用系数冻结法得到若干局部子系统。然后,配置算法和控制系统设计性能要求,建立局部子控制器设计的优化数学模型。用Matlab工具箱求解子系统数学模型,得到局部子控制器。最后采用一种平滑变增益方法,得到带前馈控制器的全局状态控制律。仿真结果表明,SSB炸弹俯仰/偏航通道控制系统具有良好的解耦特性,对给定过载指令信号具有良好的跟踪特性,满足性能指标要求。

The attitude control system of small smart bombs（SSB） is a multiple-input multiple-output time-varying system with strong coupling.The attitude control of the pitch/yaw channel is a key and difficult problem in the whole attitude control of SSB.The paper proposes an approach of designing the global state feedback controller for the pitch/yaw channel control system of small smart bombs based on the eigenstructure assignment algorithm,which can guarantee the stability and the desired transient response of SSB in the whole flight process.First,several typical characteristic points on the whole flight trajectory of SSB are determined and the corresponding local subsystems are obtained in terms of the frozen-coefficient method.Then,the optimization problem of the local subsystems is established by combing the eigenstructure assignment algorithm and the performance requirements of the control system.The local sub-controllers are obtained by solving the above optimization problem using Matlab optimization toolbox.Finally,the global state feedback controller with a feed-forward controller is constructed by a smooth gain-scheduled method.Simulation results show that the proposed pitch/yaw channel control system of SSB possesses good decoupling property and good tracking performance to follow the given overload signal.The desired performance indexes of the pitch/yaw channel control system of SSB are met,which shows the effectiveness of the proposed method.