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高超声速飞行器抗干扰反步滑模控制

, PP. 80-85

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Abstract:

针对存在参数不确定及外部扰动下的高超声速飞行器轨迹跟踪控制问题,研究了一种基于反步法的抗干扰滑模控制设计方法.将非线性高超声速飞行器动力学模型表达为严反馈形式分步进行设计.采用滑模控制方法进行每步的控制器设计,并提出采用扩展状态观测器(ESO,ExtendedStateObserver)方法实现对参数不确定及外部扰动产生的内外干扰进行估计,继而在控制中补偿.扩展状态观测器能保证对干扰的估计收敛到真值附近的邻域内,从而能够保证较好的补偿效果.通过0.5°附加干扰攻角和25%的气动参数偏差下的非线性高超声速飞行器动力学模型仿真结果验证了该抗干扰滑模控制方案对内外干扰的抑制效果和闭环系统良好的跟踪性能.

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