Fractional control of  stabilized platform for photoelectric gyro

DING Ce; DAI Ming; LI Jia-quan; MAO Da-peng; GAI Zhu-qiu; LIU Zhong-yu

doi:10.3788/OPE.20142202.0383

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Fractional control of stabilized platform for photoelectric gyro

Micro/Nano Technology and Fine Mechanics | 更新时间：2020-08-13

- Fractional control of stabilized platform for photoelectric gyro
- Optics and Precision Engineering Vol. 22, Issue 2, Pages: 383-389(2014)
- 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. 中国科学院大学北京,100039
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20142202.0383
  CLC： TP273
- Received：20 September 2013，
  
  Published：20 February 2014
- 稿件说明：
移动端阅览
丁策,戴明,李嘉全等. 光电陀螺稳定平台的分数阶控制[J]. 光学精密工程, 2014,22(2): 383-389

DING Ce, DAI Ming, LI Jia-quan etc. Fractional control of stabilized platform for photoelectric gyro[J]. Editorial Office of Optics and Precision Engineering, 2014,22(2): 383-389
丁策,戴明,李嘉全等. 光电陀螺稳定平台的分数阶控制[J]. 光学精密工程, 2014,22(2): 383-389 DOI： 10.3788/OPE.20142202.0383.

DING Ce, DAI Ming, LI Jia-quan etc. Fractional control of stabilized platform for photoelectric gyro[J]. Editorial Office of Optics and Precision Engineering, 2014,22(2): 383-389 DOI： 10.3788/OPE.20142202.0383.

摘要

为了提高光电陀螺稳定平台的隔离度

改善其在速度扰动情况下的稳定精度和跟踪精度

将分数阶

控制器引入到光电陀螺稳定平台的速率环控制中。首先

说明了采用常规PI控制提高系统精度的弊端

介绍了分数阶微积分和分数阶

控制

提出采用分数阶

控制器来提高控制系统的控制精度。然后

针对采用电流环的等效一阶纯积分控制对象

提出基于稳定裕度和剪切频率的设计方法

该方法同样适用于整数阶PI控制器。最后

以机载光电陀螺稳定平台为研究对象

分别采用分数阶

和整数阶PI控制器进行了阶跃响应、速度扰动隔离和稳定精度的实验研究。实验结果表明

采用分数阶

控制器的系统具有阶跃响应超调量小的优点

在幅值为3.14(°)/s

频率为0.5 Hz的速度扰动下

速度扰动隔离度提高了约38%

稳定精度提高了约40%。实验表明

与整数阶PI控制器相比

采用分数阶

控制器可在保证稳定裕度的前提下提高系统的控制精度

且与整数阶PI控制器一样具有易于工程实现的优点。

Abstract

To improve the isolation of a photoelectric gyro stabilized platform and to improve its accuracy of stability and tracking within velocity disturbance

the fractional

controller was applied to the rate loop control of the photoelectric gyro stabilized platform. First

the shortcomings to improve system accuracy by the conventional PI control were mentioned. Then

the fractional calculus and fractional order

control were introduced and the fractional

controller was proposed to improve the control accuracy of the control system. According to the equivalent first-order integral model with a current loop

the design method of fractional

controller parameters also suitable for the integer-order

controller was proposed based on phase margin and crossover frequency. Finally

a fractional

controller and an integer order PI controller were respectively used to perform the experiments on step response

the residues of velocity disturbance and stable accuracy for an airborne photoelectric gyro stabilized platform. Experimental results show that the system with fractional

controller has smaller overshoot than that with PI controller. The isolation of velocity disturbance is improved about 38% and the stability is improved about 40% at a frequency of 0.5 Hz and an amplitude of 3.14 (°)/s. The experiments demonstrate that control accuracy of system can be improved by using fractional

controller under ensuring the stability margin.The method proposed can be easily realized on engineering.

关键词

Keywords

references

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