Robust Hybrid Control for Ballistic Missile Longitudinal Autopilot  

作　　者：WAEL Mohsen Ahmeda WAEL Mohsen Ahmed QUAN Quan 

机构地区：[1]Department of Automatic Control, School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China [2]State Key Laboratory of Virtual Reality Technology and Systems, Beihang University, Beijing 100191, China

出　　处：《Chinese Journal of Aeronautics》2011年第6期777-788,共12页中国航空学报（英文版）

基　　金：National Natural Science Foundation of China (60904066);National Basic Research Program of China (2010CB327904);"Weishi" Young Teachers Talent Cultivation Foundation of Beihang University (YWF-11-03-Q-013)

摘　　要：This paper investigates the boost phase＇s longitudinal autopilot of a ballistic missile equipped with thrust vector control. The existing longitudinal autopilot employs time-invariant passive resistor-inductor-capacitor （RLC） network compensator as a control strategy, which does not take into account the time-varying missile dynamics. This may cause the closed-loop system instability in the presence of large disturbance and dynamics uncertainty. Therefore, the existing controller should be redesigned to achieve more stable vehicle response. In this paper, based on gain-scheduling adaptive control strategy, two different types of optimal controllers are proposed. The first controller is gain-scheduled optimal tuning-proportional-integral-derivative （PID） with actuator constraints, which supplies better response but requires a priori knowledge of the system dynamics. Moreover, the controller has oscillatory response in the presence of dynamic uncertainty. Taking this into account, gain-scheduled optimal linear quadratic （LQ） in conjunction with optimal tuning-compensator offers the greatest scope for controller improvement in the presence of dynamic uncertainty and large disturbance. The latter controller is tested through various scenarios for the validated nonlinear dynamic flight model of the real ballistic missile system with autopilot exposed to external disturbances.This paper investigates the boost phase＇s longitudinal autopilot of a ballistic missile equipped with thrust vector control. The existing longitudinal autopilot employs time-invariant passive resistor-inductor-capacitor （RLC） network compensator as a control strategy, which does not take into account the time-varying missile dynamics. This may cause the closed-loop system instability in the presence of large disturbance and dynamics uncertainty. Therefore, the existing controller should be redesigned to achieve more stable vehicle response. In this paper, based on gain-scheduling adaptive control strategy, two different types of optimal controllers are proposed. The first controller is gain-scheduled optimal tuning-proportional-integral-derivative （PID） with actuator constraints, which supplies better response but requires a priori knowledge of the system dynamics. Moreover, the controller has oscillatory response in the presence of dynamic uncertainty. Taking this into account, gain-scheduled optimal linear quadratic （LQ） in conjunction with optimal tuning-compensator offers the greatest scope for controller improvement in the presence of dynamic uncertainty and large disturbance. The latter controller is tested through various scenarios for the validated nonlinear dynamic flight model of the real ballistic missile system with autopilot exposed to external disturbances.

关 键 词：ballistic missiles attitude control gain-scheduling optimal tuning-control LQ optimal regulators 

分 类 号：TJ765[兵器科学与技术—武器系统与运用工程]