大口径射电望远镜伺服时滞因素分析及其预测补偿控制  

Analysis and Prediction Compensation Control of Servo Time Delay Factors for Large Radio Telescopes

作　　者：朱学利 薛松 冯宇 连培园 伍洋[4] 许谦[5] 孔德庆[6] 王从思 ZHU Xueli;XUE Song;FENG Yu;LIAN Peiyuan;WU Yang;XU Qian;KONG Deqing;WANG Congsi(Guangzhou Institute of Technology,Xidian University,Guangzhou 510555,China;State Key Laboratory of Electromechanical Integrated Manufacturing of High-Performance Electronic Equipments,Xidian University,Xi’an 710071,China;School of Mechano-Electronic Engineering,Xidian University,Xi’an 710071,China;The 54th Research Institute of CETC,Shijiazhuang 050081,China;Xinjiang Astronomical Observatory,Chinese Academy of Sciences,Urumqi 830011,China;National Astronomical Observatory,Chinese Academy of Sciences,Beijing 100101,China)

机构地区：[1]西安电子科技大学广州研究院,广东广州510555 [2]西安电子科技大学高性能电子装备机电集成制造全国重点实验室,陕西西安710071 [3]西安电子科技大学机电工程学院,陕西西安710071 [4]中国电子科技集团公司第五十四研究所,河北石家庄050081 [5]中国科学院新疆天文台,新疆乌鲁木齐830011 [6]中国科学院国家天文台,北京100101

出　　处：《电子机械工程》2024年第3期43-49,共7页Electro-Mechanical Engineering

基　　金：国家重点研发计划项目(2021YFC2203600);国家自然科学基金资助项目(U23A6017);陕西省秦创原“科学家+工程师”队伍建设项目(2022KXJ-030)。

摘　　要：射电望远镜控制系统是一个多变量复杂系统,伺服系统中的摩擦、齿轮间隙等众多时滞因素严重影响着射电望远镜系统的精度和稳定性。文中针对大口径射电望远镜伺服控制系统中的时滞因素进行研究。以模型预测控制(Model Predictive Control,MPC)为主控器,利用模糊比例-积分(Proportional-Integral,PI)控制结合Smith预估器解决时滞因素带来的影响,并利用所提出的控制方法对射电望远镜的位置控制系统进行时域分析。研究结果表明,在时滞因素影响下,大口径射电望远镜伺服控制系统依旧可以保持稳定,超调量为0.6%,稳态误差小于0.15%,满足大口径天线1.39%的指向精度要求。The radio telescope control system is a multivariable complex system,and many time delay factors such as friction and gear gap in the servo system seriously aflect the accuracy and stability of the radio telescope system.This paper studies the time delay factors in the servo control system of the large aperture radio telescope.The model predictive control(MPC)is used as the master controller,and the fuzzy PI control is combined with Smith predictive control to solve the impact of the time delay factors.The position control system of the radio telescope is analyzed in time domain by using the proposed control method.The study results show that under the influence of time delay factors,the servo control system of large aperture radio telescope can still maintain stability,the overshoot is 0.6%and the steady-state error is less than 0.15%,which meets the requirement of 1.39%pointing accuracy of large aperture antenna.

关 键 词：大口径射电望远镜 模型预测控制 SMITH预估器 

分 类 号：P111.44[天文地球—天文学]