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Model in frequency-domain identification of a fast steering mirror system based on levenberg-marquardt algorithm
Peng, Chen1,2; Yanbing, Liang(梁雁冰)2; Peng, Chen (18363123192@163.com)
2018-03-29
会议名称2nd International Conference on Cybernetics, Robotics and Control, CRC 2017
会议录名称Proceedings - 2017 2nd International Conference on Cybernetics, Robotics and Control, CRC 2017
卷号2018-January
页码199-202
会议日期2017-07-21
会议地点Chengdu, Sichuan, China
出版者Institute of Electrical and Electronics Engineers Inc.
产权排序1
摘要

A method for frequency-domain identification of a fast steering mirror system is provided. The method firstly uses swept sine as dynamic excitation signal to obtain the frequency characteristics of controlled object and frequency response data by dynamic signal analyzer Agilent 35670A. Then the paper uses data pre-processed to analyze magnitude-phase characteristics based on FFT (Fast Fourier Fransform). The error of FFT calculation is relative major. To obtain the frequency characteristics approaching to real system, windowing and Sample Hold is introduced to modify magnitude-phase characteristics. For non-parametric frequency characteristics curve of the system, in combination of Levenberg-Marquardt nonlinear least squares curve fitting and transfer function model based on dynamic mechanism modelling, this paper implements curve fitting for low frequency band with frequency characteristics. With this method, the frequency characteristics of complex system can be converted to accurate transfer function. Levenberg-Marquardt algorithm providing the theoretical support for parameterizing BODE diagram is an optimization strategy. The optimization strategy improves the matching degree between actual system and model system in process of modeling and it is provided for the compensation of the influence which is from the temperature shift and measurement error of components. The paper provides a theoretical foundation for building a more complex electro-optical tracking system. © 2017 IEEE.

作者部门光谱成像技术实验室
DOI10.1109/CRC.2017.10
收录类别EI
ISBN号9781538606773
语种英语
引用统计
文献类型会议论文
条目标识符http://ir.opt.ac.cn/handle/181661/30318
专题光电测量技术实验室
通讯作者Peng, Chen (18363123192@163.com)
作者单位1.Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Xi'an, China
2.Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
推荐引用方式
GB/T 7714
Peng, Chen,Yanbing, Liang,Peng, Chen . Model in frequency-domain identification of a fast steering mirror system based on levenberg-marquardt algorithm[C]:Institute of Electrical and Electronics Engineers Inc.,2018:199-202.
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