大口径深空探测天线抗风干扰伺服系统设计

孙明玮; 邱德敏; 王永坤; 陈增强

doi:10.3788/OPE.20132106.1568

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大口径深空探测天线抗风干扰伺服系统设计

微纳技术与精密机械 | 更新时间：2020-08-12

- 大口径深空探测天线抗风干扰伺服系统设计
- Wind Disturbance Rejection Servo System Design for Large Deep Space Observatory Antenna
- 光学精密工程 2013年21卷第6期页码：1568-1575
- 作者机构：
  
  南开大学自动化系2.中国西安卫星测控中心
- 作者简介：
- 基金信息：
  
  大尺寸有障碍空间角度与基面位置测量的关键技术();新世纪优秀人才支持计划()
- DOI：10.3788/OPE.20132106.1568
  中图分类号： V443.4;TP273
- 收稿日期：2013-01-08，
  
  修回日期：2013-03-05，
  
  网络出版日期：2013-06-20，
  
  纸质出版日期：2013-06-15
- 稿件说明：
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孙明玮邱德敏王永坤陈增强. 大口径深空探测天线抗风干扰伺服系统设计[J]. 光学精密工程, 2013,21(6): 1568-1575

SUN Ming-wei QIU De-min WANG Yong-kun CHEN Zeng-qiang. Wind Disturbance Rejection Servo System Design for Large Deep Space Observatory Antenna[J]. Editorial Office of Optics and Precision Engineering, 2013,21(6): 1568-1575
孙明玮邱德敏王永坤陈增强. 大口径深空探测天线抗风干扰伺服系统设计[J]. 光学精密工程, 2013,21(6): 1568-1575 DOI： 10.3788/OPE.20132106.1568.

SUN Ming-wei QIU De-min WANG Yong-kun CHEN Zeng-qiang. Wind Disturbance Rejection Servo System Design for Large Deep Space Observatory Antenna[J]. Editorial Office of Optics and Precision Engineering, 2013,21(6): 1568-1575 DOI： 10.3788/OPE.20132106.1568.

摘要

为了改善风载荷干扰对深空探测天线跟踪精度和寿命的影响，设计了位置环线性自抗扰控制器。由于扰动观测器可以改善系统性能，本文基于电机动力学机理，将电流与速度的反馈与负载的影响作为总扰动的一部分，通过静态增益对前向通道的惯性环节进行近似，极大地降低了扩张状态观测器的阶次；采用在线估计和补偿策略，抑制了风载荷干扰对控制系统的不利影响；利用描述函数法分析了包含摩擦特性的非线性系统闭环特性，说明这种控制策略可以避免极限环的产生。最后，开展了数学仿真和现场试验。在一深空探测系统上的应用结果显示，提出的控制策略超调比原产品减少了34%，抗击阵风干扰能力提高了60%，跟踪精度提高显著。得到的结果表明设计的控制策略提高了系统抗风干扰的能力。

Abstract

With the aim to attenuate the effect of wind load disturbance on the tracking precision and the life-span of a large deep space observatory antenna

this paper proposed a wind disturbance rejection servo system. As disturbance observer can improve the system performance

the mechanism of electrical motor was utilized to simplify the design process. The feedback channels of current and speed control as well as load impact were regarded as parts of the total disturbance

and the lags in the feed-forward channels were approximated by their steady gains respectively. Therefore

the required order of the extended state observer

which was employed to estimate the total disturbance

including the wind load torque and other uncertain mechanical dynamics

could be substantially reduced. Then

the total disturbance was compensated by the observer. Furthermore

the limit cycle was eliminated in the presence of friction according to the describing function method. Finally

mathematical simulations and experiments were carried out. In the experiment

the overshoot is reduced by 34% and the capacity of gust rejection is increased by 60%

respectively

as compared with that of traditional equipment

while the tracking precision is also raised significantly. The objective of rejecting the wind gust disturbance for the large deep space observatory antenna system can be achieved by using the proposed method.

关键词

Keywords

references

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