拦截机动目标的自适应模糊末制导律设计  

Adaptive fuzzy guidance law for maneuvering targets

作　　者：李士勇[1] 袁丽英[1] 

机构地区：[1]哈尔滨工业大学航天学院,黑龙江哈尔滨150001

出　　处：《电机与控制学报》2009年第2期312-316,共5页Electric Machines and Control

基　　金：国家自然科学基金(60773065)

摘　　要：为提高拦截大机动目标的制导性能,将模糊控制与变结构控制理论相结合,设计了一种模糊末制导律。将目标的机动加速度视为外界干扰,将制导系统的模糊控制规则多个输入变量转化为滑动曲面一个变量,并根据Lyapunov函数分析自适应模糊制导律参数的自适应律,保证了导弹与目标的视线角速率在较小的数值范围,提高制导系统的鲁棒性。仿真结果表明,在相同攻击时间内,对比于比例导引和一般模糊制导律,提出的自适应模糊末制导律减小了脱靶量和拦截时间。A fuzzy terminal guidance law was developed for intercepting maneuvering space targets that combine fuzzy control and sliding-mode control theory. The nonlinear relative dynamics between the＇interceptor and the target in the vertical plane is analyzed with the target acceleration being viewed as an unknown disturbance. By defining the sliding surface as the input variable of fuzzy rules, the adaptive laws on a Lyapunov function are developed to adjust the parameters of the fuzzy rules to guarantee the stability of the system. The guidance law not only keeps the line-of-sight rate between interception and target converging to zero, but also guarantees intercepting all kinds of maneuvering targets. The simulation results show that the guidance law reduces the miss distance and flight time of attack missile compared with proportional navigation guidance law and fuzzy logic law.

关 键 词：末制导律 模糊控制器 变结构控制 导弹 

分 类 号：TJ765.2[兵器科学与技术—武器系统与运用工程]