自抗扰fal函数的改进及在无拖曳卫星中的应用  

Fal Function Improvement of ADRC and its Application in Drag-Free Satellite

作　　者：乔鑫宇 周文雅[1] 吴国强[1] Qiao Xinyu;Zhou Wenya;Wu Guoqiang(School of Aeronautics and Astronautics,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学航空航天学院,大连116024

出　　处：《航天控制》2022年第4期38-44,共7页Aerospace Control

摘　　要：针对自抗扰控制器在无拖曳卫星应用时瞬态性能以及鲁棒性上的不足,提出了自抗扰控制器非线性fal函数的改进形式——faln函数。函数通过调节函数大误差段增益,提高扩张状态观测器的抗差能力,以改善控制系统的性能。将faln函数与现有的自抗扰控制器形式进行对比仿真分析,结果表明faln函数可以让控制器拥有更快速、平稳的过渡过程,可以很好地提升无拖曳系统的控制性能。In order to improve the deficiency of transient performance and robustness of ADRC in the application of drag-free satellite, an improved form of nonlinear fal function, known as faln function, is proposed. This new function can enhance robustness of extended state observer and the performance of control system through the adjustment of gain in the large error section. The comparation and analysis of simulation result shows that the controller has the rapidest and stablest transient process by comparing with other drag-free control system. In a nutshell, the control performance of drag-free control system can be improved.

关 键 词：无拖曳卫星 自抗扰控制器 扩展状态观测器 fal函数 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]