中国空间科学技术

›› 2014, Vol. 34 ›› Issue (6): 31-.doi: 10.3780/j.issn.1000-758X.2014.06.005

• 研究探讨 • 上一篇    下一篇

数传跟踪天线驱动控制建模与仿真

 周勇, 张剑   

  1. (中国空间技术研究院西安分院,西安 710100 )
  • 收稿日期:2014-03-17 出版日期:2014-12-25 发布日期:2014-12-25
  • 作者简介:周暋勇 1976年生,2002年获西北工业大学交通信息工程及控制专业硕士学位,高级工程师。研究方向为航天器天线控制。张暋剑 1972年生,1995年毕业于西安电子科技大学信息论专业,研究员。研究方向为测控与星间链路技术。

Modeling and Simulation of Driving Data Transmission Antenna

 ZHOU  Yong, ZHANG  Jian   

  1. (China Academy of SpaceTechnology(Xi'an),Xi'an 710100)
  • Received:2014-03-17 Online:2014-12-25 Published:2014-12-25

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摘要： 星载高增益数传跟踪天线一般采用步进电动机和谐波减速器作为驱动源,要求其跟踪执行精度小于0灡1°(3σ)。文章以数传跟踪天线机构为研究对象,综合考虑了步进电动机矢量转矩模型、谐波齿轮的非线性动力学模型以及驱动电路动态模型。建立了非线性数字仿真模型,通过仿真计算,得到跟踪机构的单步响应、跟踪精度、输出转矩等运动特性,比较仿真结果和试验结果,对所建模型进行验证。比较结果表明,建立的天线机构驱动模型准确可靠,执行精度小于0.017°(3σ),满足天线指向精度要求。

关键词: 步进电动机, 谐波减速器, 数学模型, 跟踪精度, 航天器

Abstract: The high gainantenna was drived with the stepper motor,the harmonic gear and the microstep driver.The over all antenna pointing error shall be 0.1°(3σ)or less.The model of driving antenna was described.On account of the torque model of stepper motor,the nonlinear dynamics model of the harmonic gear and the dynamic model of the microstep driver,as well as the nonlinear model was built,the step response,pointing error and output torque were provided by the proposed model.Comparing with the simulation and experiment results,the math model is correct and reliable.The pointing  error is 0.017°(3σ)or less,meeting the requirements for pointing precision.

Key words: Stepper motor, Harmonic gear, Mathematical model, Pointing precision, Spacecraft