基于分数阶自抗扰的快反镜控制方法  

Control Method of Fast Steering Mirror Based on Fractional-order Active Disturbance Rejection

作　　者：车鸿鹏 孔德聪 王凯[1] 杜新宇 王碧衡 CHE Hongpeng;KONG Decong;WANG Kai;DU Xinyu;WANG Biheng(Academy of Opto-Electronics,China Electronics Technology Group Corporation(AOE CETC),Tianjin,China)

机构地区：[1]中国电子科技集团公司光电研究院,天津

出　　处：《光电技术应用》2024年第6期41-48,共8页Electro-Optic Technology Application

摘　　要：快反镜作为复合轴光电跟踪系统的重要组成单元,其自身扰动抑制能力和动态响应能力决定了系统跟踪精度的上限。为提升快反镜系统性能,在现有自抗扰控制理论的基础上结合分数阶理论,提出一种分数阶自抗扰控制器(fractional-order active disturbance rejection control,FO-ADRC)。给出该控制器设计过程,并通过仿真和实验验证的方式对比分析了传统自抗扰控制器(active disturbance rejection control,ADRC)、扩张状态观测器和分数阶PDμ控制器组成的分数阶自抗扰控制器两种控制策略对于快反镜动态性能的控制效果。实验结果表明,分数阶自抗扰控制器相较于传统自抗扰控制器在阶跃响应情况下,快反镜快速性提升了20.58%,在正弦曲线跟踪情况下,缩小了快反镜跟踪起始阶段跟踪误差,取前两个周期的误差数据计算跟踪精度提升了26.9%。As an important component of the composite-axis photoelectric tracking system,the upper limit of the tracking accuracy of the system is determined by the perturbation suppression ability and dynamic response ability of the fast steering mirror itself.In order to improve the performance of the fast steering mirror system,a fractional-order active disturbance rejection controller based on the existing active disturbance rejection control theory and combined with the fractional-order theory is proposed.The design process of the controller is given,and the control effect of two control strategies to the fast steering mirror performance,i.e.the traditional active disturbance rejection controller(ADRC)and the fractional-order active disturbance rejection controller composed of the expanded state observer and fractional-order controller,is compared and analyzed through simulation and experimental verification.Experimental results show that the fractional-order active disturbance rejection controller improves the fast steering mirror rapidity by 20.58%compared with the traditional active disturbance rejection controller in the case of step response,while the fast steering mirror tracking accuracy improves by 26.9%in the case of sinusoidal tracking.

关 键 词：快反镜 分数阶比例-积分-微分(PID) 自抗扰控制 扩张状态观测器 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]