摘要
针对摆动喷管控制的弹道导弹姿态控制系统模型不确定、运动参数时变和非零点输出调节的问题,采用最优控制理论设计其助推段的姿态控制方案。首先,在分析摆动喷管的推力和力矩的基础上推导出弹道导弹的纵向动力学模型,将线性二次型输出调节器中的零调节器理论扩展到非零给定点范围,确定出控制系统的增益系数,设计导弹的姿态指令跟踪器。然后,选取特征点对导弹纵向通道和横向通道控制系统进行定点仿真校验,通过调节权系数取值,实现系统输出对输入的快速准确响应。最后,在气动摄动±50%的情况下进行系统仿真,结果表明,考虑了气动参数不确定性的情况,采用摆动喷管设计的控制系统依旧保持稳定,能够准确跟踪俯仰角和偏航角指令,该系统具有输出响应速度快、跟踪误差小、鲁棒性好、安全性高的特点。
In order to solve the problems of model uncertainty,time-varying motion parameters and non-zero-point output adjustment of the ballistic missile attitude control system controlled by the swing nozzle,this paper uses the optimal control theory to design the attitude control scheme of the boost section.First,the longitudinal dynamic model of the ballistic missile is deduced based on the analysis of the thrust and moment of the swing nozzle,the zero-regulator theory in the linear quadratic output regulator is extended to a non-zero setpoint range,the gain coefficient of the control system is determined,and the missile’s attitude command tracker is designed.Then,we select characteristic points to carry out fixed-point simulation verification on the missile longitudinal channel and lateral channel control system.By adjusting the value of the weight coefficient,the system output can be quickly and accurately responded to the input.Finally,the system simulation was performed with a perturbation of 50%.The results show that considering the uncertainty of aerodynamic parameters,the control system designed with wobble nozzle remains stable,and can accurately track the pitch and yaw angle instructions.The system has the characteristics of fast response speed,small tracking error and good robustness.
作者
王敏
余瑞星
WANG Min;YU Rui-xing(School of Mingde,Northwestern Polytechnical University,Xi’an 710124,China;School of Astronautics,Northwestern Polytechnical University,Xi’an 710072,China)
出处
《西安科技大学学报》
CAS
北大核心
2018年第5期830-836,共7页
Journal of Xi’an University of Science and Technology
基金
航空科学基金(20160153001)
上海航天科技创新基金(SAST2015040)
关键词
导弹姿态控制
摆动喷管
推力矢量
鲁棒性
attitude control of missiles
vector of thrust force
swing nozzle
robust
