摘要
对含变时滞输入的挠性航天器姿态复合控制问题进行了研究,主要是通过设计一个时滞依赖的H_∞控制和干扰观测器(DOBC)相结合的复合分层控制结构,实现姿态角和姿态角速度的稳定控制.本文所提方法的优势为:1)对振动引起的干扰进行精确补偿,减少了干扰对控制效果的影响;2)设计了时滞依赖的状态控制器,降低了时滞对姿态的影响;3)在泛函求解过程中引入了时滞积分不等式分解系数,从而降低了设计的保守性.最后,通过数值仿真验证了本文设计的控制方法的有效性,并分析了时滞量及时滞积分不等式分解系数对闭环系统性能的影响.
This paper focuses on the attitude control of flexible spacecraft with time-varying input delay. A composite hierarchical control structure,which combines delay-dependent H_∞ control with disturbance-observerbased control( DOBC),is designed to achieve stable control of both attitude angle and attitude angular velocity.Advantages of the proposed method include: 1) the disturbance caused by vibration is compensated accurately to reduce the influence of disturbance on control effects; 2) a delay-dependent state controller is designed to reduce the effects of delay on attitude; 3) the decomposition coefficient of delay integral inequality is introduced in the process of function solving,which may reduce design conservatism. Finally,numerical simulations are used to verify the effectiveness of the proposed method and to show the effects on close loop system performance by time delay bound and decomposition coefficient.
出处
《南京信息工程大学学报（自然科学版）》
CAS
2016年第6期505-512,共8页
Journal of Nanjing University of Information Science & Technology（Natural Science Edition）
基金
国家自然科学基金(61573189
61403207)
江苏省杰出青年基金(BK20140045)
江苏省自然科学基金(BK20131000)
江苏省六大人才高峰计划(2015-DZXX-013)
江苏省高校优秀科技创新团队计划(苏教办科(2015)4号)
关键词
挠性航天器
变时滞输入
H∞控制
干扰观测器
flexible spacecraft
time-varying input delay
H∞ control
disturbance observer
