Fast position control of the lensbarrel of aerial cameras with non-overshoot in omnirange

doi:10.3788/OPE.20132110.2574

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Fast position control of the lensbarrel of aerial cameras with non-overshoot in omnirange

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- Fast position control of the lensbarrel of aerial cameras with non-overshoot in omnirange
- Optics and Precision Engineering Vol. 21, Issue 10, Pages: 2574-2580(2013)
- 作者机构：
  
  1. 中国科学院长春光学精密机械与物理研究所中国科学院航空光学成像与测量重点实验室,吉林长春,130033
  2. 空军航空大学,吉林长春,130022
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20132110.2574
  CLC： TP273
- Received：09 August 2012，
  
  Revised：02 October 2012，
  
  Published Online：19 October 2012，
  
  Published：15 October 2013
- 稿件说明：
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黄浦修吉宏李军李友一杨秀丽. 航空相机镜筒全程快速无超调位置控制[J]. 光学精密工程, 2013,21(10): 2574-2580

HUANG Pu XIU Ji-hong LI Jun LI You-yi YANG Xiu-li. Fast position control of the lensbarrel of aerial cameras with non-overshoot in omnirange[J]. Editorial Office of Optics and Precision Engineering, 2013,21(10): 2574-2580
黄浦修吉宏李军李友一杨秀丽. 航空相机镜筒全程快速无超调位置控制[J]. 光学精密工程, 2013,21(10): 2574-2580 DOI： 10.3788/OPE.20132110.2574.

HUANG Pu XIU Ji-hong LI Jun LI You-yi YANG Xiu-li. Fast position control of the lensbarrel of aerial cameras with non-overshoot in omnirange[J]. Editorial Office of Optics and Precision Engineering, 2013,21(10): 2574-2580 DOI： 10.3788/OPE.20132110.2574.

摘要

为消除航空相机镜筒在位置控制过程中的超调，改善系统的动态性能，针对阶跃输入信号，采用跟踪微分器对镜筒位置过渡过程进行了设计。首先，阐述了跟踪微分器理论，对其特性进行了详细分析。在此基础上，以90位置阶跃响应为例，进行了过渡过程设计，并与无过渡过程设计的控制效果进行了比较。实验结果表明，通过合理设计过渡过程，能完全消除镜筒位置响应的超调，同时减小调节时间。在90阶跃输入时，超调量由24.1%减小为零，同时调节时间缩短28.8%。此外，采用最小二乘法拟合阶跃输入量与过渡过程快速因子的函数关系，控制过程中根据阶跃输入量计算最优过渡过程参数，实现了镜筒位置的全程快速无超调控制。该方法已经在航空相机镜筒中进行了实际应用，取得了良好的效果，对于改善系统的动态性能具有较高的实用价值。

Abstract

In order to eliminate the overshoot of the lensbarrel of an aerial camera in process of position control and improve the dynamic performance of system

a tracking differentiator is applied to design the position transient process. First

the theory of a tracking differentiator is described and its characteristic is expatiated. And then

taking position step response with 90 degrees input as example

the transient process is designed and compared with that of no transient process design. Experiment results show that the position overshoot of lensbarrel can be eliminated completed through the appropriate transient process design

and the time of regulation reduces meanwhile. In the case of 90 degrees step input

the system overshoot is reduced from 24.4% to zero and the time of regulation is shorten 28.8%. Furthermore

fast position control of the lensbarrel is realized with non-overshoot in omnirange in which the method of least squares is applied to fit a curve of step input and speedability parameter in transient process. The optimum parameter of the transient process is calculated according to step input in control process. This method is applied to the lensbarrel of aerial cameras and makes a good effect

which is of significant and practical value to improve the dynamic performance of systems.

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references

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