The invention discloses a small celestial body detector flying-around orbit tracking control method, which comprises the steps of designing a nonlinear disturbance observer according to a small celestial body detector flying-around kinetic model under unknown disturbance to estimate external disturbance borne by a detector, and compensating dynamic characteristics of the external disturbance to acontroller; designing an adaptive law to estimate an observation error boundary output by the disturbance observer; introducing a dynamic surface technology to solve the problem of differential explosion caused by derivation of virtual control quantity in adaptive law design; designing a controller combined with a hyperbolic tangent function replacing a sign function; taking the output of the dynamic surface self-adaptive sliding mode controller as the input of a pseudo-rate modulator, enabling the pseudo-rate modulator to output a tuned oscillation pulse for driving a thruster to work, and driving the thruster to generate a control moment on a rolling shaft, a heading shaft and a pitching shaft to counteract an interference moment; the control method disclosed by the invention enables thesmall celestial body detector to achieve high-precision tracking control around the flight section orbit under unknown disturbance.

    本发明公开一种小天体探测器绕飞轨道跟踪控制方法,根据未知扰动下的小天体探测器绕飞动力学模型设计非线性扰动观测器估计探测器受到的外部扰动,并将其动态特性补偿到控制器;设计自适应律对扰动观测器输出的观测误差界进行估计;引入动态面技术解决在自适应律设计中对虚拟控制量求导产生的微分爆炸问题;设计与代替符号函数的双曲正切函数相结合的控制器;将动态面自适应滑模控制器的输出作为伪速率调制器的输入,使其输出驱动推力器工作的调谐振荡脉冲,驱动推力器在翻滚轴、航向轴、俯仰轴上产生控制力矩抵消干扰力矩;本发明公开的控制方法使小天体探测器在未知扰动下实现高精度绕飞段轨道跟踪控制。


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    Title :

    Small celestial body detector flying-around orbit tracking control method


    Additional title:

    一种小天体探测器绕飞轨道跟踪控制方法


    Contributors:
    YAO WENLONG (author) / YANG KE (author) / SHAO WEI (author) / CHI RONGHU (author)

    Publication date :

    2021-01-12


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    G06F ELECTRIC DIGITAL DATA PROCESSING , Elektrische digitale Datenverarbeitung / B64G Raumfahrt , COSMONAUTICS




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