摘要
带有活动式有效载荷和挠性附件的大型航天器在动力学上具有非线性、大挠性、强耦合等特点,这给控制系统的设计带来了较大难度。其突出特点是要求控制系统在控制量受限的情况下克服各种未知复杂干扰力矩的影响。本文针对这类大型复杂航天器,提出了一种基于直接型自适应模糊逻辑和干扰补偿的控制方法。在控制律的设计中,将自适应模糊系统直接用作系统的主控制律,利用扩张状态观测器对模糊系统的逼近误差和内外干扰力矩进行观测并予以实时补偿。仿真结果表明了方法的有效性。
The dynamics of large spacecrafis with moving payloads and flexible attachments are nonlinear, flexible and strong coupling, and it is a challenge to control systems. The major difficulty is that the controller has to overcome all the unknown complicated disturbances with limited control torques. A combined control method is presented in this paper for a type of large spacecrafis. In this method, the main control law is approximated by an adaptive fuzzy system directly; the approximation error and disturbing torques are observed by an extended state observer and compensated on line. The simulation results illustrate the effectiveness.
出处
《航天控制》
CSCD
北大核心
2007年第4期21-25,30,共6页
Aerospace Control
基金
国家重点基础研究专项基金资助项目(2002CB312205)
国家自然科学基金资助项目(90405017)
关键词
自适应模糊系统
干扰力矩
扩张状态观测器
航天器
姿态控制
Adaptive fuzzy system
Disturbing torques
Extended state observer
Spacecraft
Attitude control
