基于新型非线性函数的动能拦截器自抗扰姿态跟踪控制  

Active Disturbance Rejection Control of Kinetic Energy Interceptor Based onNovel Nonlinear Function

作　　者：张亮[1] 鄢杰 张哲[1] 黄盘兴 ZHANG Liang;YAN Jie;ZHANG Zhe;HUANG Panxing(Sun Yat-sen University,Shenzhen 518107,China;Beijing Institute of Control Engineering,Beijing 100094,China;National Key Laboratory of Space Intelligent Control,Beijing 100094,China)

机构地区：[1]中山大学,深圳518107 [2]北京控制工程研究所,北京100094 [3]空间智能控制技术全国重点实验室,北京100094

出　　处：《空间控制技术与应用》2024年第4期55-65,共11页Aerospace Control and Application

基　　金：国家自然科学基金资助项目(12002398);国防科技重点实验室基金项目(2022-JCJQ-LB-010-03)。

摘　　要：针对动能拦截器在开展空间拦截任务时,对姿态控制系统快速性、准确性和鲁棒性的极高要求,提出了一种新型自抗扰控制方法.建立了动能拦截器姿态动力学模型,并将其转换为姿态跟踪误差二阶状态方程;基于自抗扰控制器中小误差大增益、大误差小增益的思想,设计了一种新型的非线性函数;基于该非线性函数,设计了一种新型的跟踪微分器,并且优化了扩张状态观测器和非线性控制器.将指定时间收敛的预设性能函数作为跟踪微分器的期望信号,可实现姿态误差按照预设性能函数收敛到期望值,且收敛时间可预先确定.利用伪速率(pseudo rate,PSR)脉冲调制器对连续控制力矩进行脉冲调制.数值仿真结果表明本文设计的控制方法具有较高的姿态控制精度,在面临环境扰动时具有较好的鲁棒性.A novel active disturbance rejection control method is proposed to satisfy the high requirement of speed,accuracy and robustness of attitude control system for kinetic energy interceptor in space interception mission.First-ly,the attitude dynamics model of the kinetic energy interceptor is established and converted into the second-order state equation of attitude tracking error.Secondly,based on the idea of small error,large gain and large error,small gain,a new nonlinear function is designed.Then,the tracking differentiator,the extended state observer and the nonlinear controller are respectively designed based on the nonlinear function.By taking the prescribed per-formance function that converges at a specified time as the expected signal of the tracking differentiator,the attitude error can converge to the expected value according to the prescribed performance function,and the convergence time can be predetermined.Finally,the pseudo-rate pulse modulator is used to pulse the continuous control torque.Numerical simulations demonstrate that the proposed control method exhibits precise attitude control and robust re-silience against external disturbances.

关 键 词：动能拦截器 非线性函数 自抗扰控制 脉冲调制器 

分 类 号：V448[航空宇航科学与技术—飞行器设计]