基于液体晃动干扰观测器的航天器混沌姿态H∞控制

秦利; 刘福才; 梁利环; 侯甜甜

doi:10.7498/aps.63.090502

燕山大学，工业计算机控制工程河北省重点实验室，秦皇岛 066004

H∞ control for spacecraft chaotic attitude motion by liquid sloshing disturbance observer

摘要: 针对航天器受液体燃料晃动及内外周期性微小激励耦合影响产生混沌运动的问题，提出了基于神经网络干扰观测器的自适应H∞鲁棒控制方案，以实现充液航天器混沌姿态运动的消除与液体燃料晃动的抑制。基于神经网络的非线性逼近能力设计干扰观测器，自适应跟踪补偿液体晃动、参数不确定及外扰引起的耦合扰动，解决液体燃料晃动角速度及外扰不易直接测量的问题，提高控制器对系统不确定的自适应能力及液体晃动的抑制能力。同时考虑观测误差与模型不精确问题，利用H∞控制策略提高控制器的鲁棒性。通过与现有常用控制策略的对比仿真研究，验证了控制方案的有效性及优势。

关键词:

Abstract: To investigate the control problem of chaotic motion in spacecraft system caused by the coupled effect of liquid fuel sloshing and small periodic disturbance inside or outside spacecraft, the H∞ control strategy based on neural network disturbance observer is presented, which makes liquid spacecraft disengage chaos and liquid fuel sloshing which are inhibited. Disturbance observer is designed to track and compensate the coupled disturbance caused by liquid sloshing, parameter uncertainty, and external disturbance based on the nonlinear approximation capability of neural network. Taking into account the problems of observation error and model inaccuracy, the H∞ control strategy can be applied to improve the robustness of the control system. Compared with the existing common control algorithm, the proposed strategy proves to be valid and better at adaptability and robustness by simulations.

基于液体晃动干扰观测器的航天器混沌姿态H∞控制

燕山大学，工业计算机控制工程河北省重点实验室，秦皇岛 066004

关键词:

H∞ control for spacecraft chaotic attitude motion by liquid sloshing disturbance observer

燕山大学，工业计算机控制工程河北省重点实验室，秦皇岛 066004

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