航空学报 > 2018, Vol. 39 Issue (1): 321481-321481   doi: 10.7527/S1000-6893.2017.321481

基于有限时间理论的临近空间拦截器末制导律PWPF调节器研究

段美君1, 周荻1, 程大林2   

  1. 1. 哈尔滨工业大学 航天学院, 哈尔滨 150001;
    2. 北京宇航系统工程研究所, 北京 100076
  • 收稿日期:2017-06-05 修回日期:2017-09-08 出版日期:2018-01-15 发布日期:2018-01-15
  • 通讯作者: 周荻,E-mail:zhoud@hit.edu.cn E-mail:zhoud@hit.edu.cn
  • 基金资助:
    国家自然科学基金(61173142)

Development of terminal guidance law and PWPF modulator for near space interceptor based on finite time theory

DUAN Meijun1, ZHOU Di1, CHENG Dalin2   

  1. 1. School of Astronautics, Harbin Institute of Technology, Harbin 150001, China;
    2. Beijing Institute of Astronautical Systems Engineering, Beijing 100076, China
  • Received:2017-06-05 Revised:2017-09-08 Online:2018-01-15 Published:2018-01-15
  • Supported by:
    ational Natural Science Foundation of China (61173142)

摘要: 针对拦截临近空间高速机动目标,基于有限时间理论,设计了有限时间收敛末制导律和脉冲宽度脉冲频率(PWPF)调节器。首先,介绍了加入PWPF调节器的末制导数学模型及工作原理;其次,设计了有限时间收敛制导律,应用有限时间理论证明了收敛条件和性质,并推广到推力受限条件下;最后,考虑视线(LOS)角速率快速收敛和发动机最小工作时间要求,设计了PWPF调节器参数。仿真结果表明,视线角速率在制导结束前的有限时间收敛至零,对目标机动具有鲁棒性,具有较高的制导精度,避免了发动机频繁开启,节省了燃料。

关键词: 临近空间, 末制导律, 有限时间收敛, 推力受限, PWPF调节器

Abstract: Based on the finite time theory, the finite time convergence terminal guidance law and Pulse Width Pulse Frequency (PWPF) modulator are proposed for intercepting near space high-speed maneuvering targets. First, the mathematical model and working principle of terminal guidance with PWPF modulator are introduced. Second, the finite time convergent guidance law is designed. The convergence conditions and properties are proved based on the finite time theory, and areextended to the condition considering the thrust constraint. Finally, considering the fast convergence of Line of Sight (LOS) angular rate and the minimum working time of the engine, the parameters of the PWPF modulator are designed. The simulation results show that the LOS angular rate converges to zero in finite time before the end of terminal guidance. The guidance law, robust to the maneuvering target, has higher guidance precision. and can avoid frequent on-off of the engine to save fuel.

Key words: near space, terminal guidance law, finite time convergence, thrust constraint, PWPF modulator

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