JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2015, Vol. 45 ›› Issue (4): 45-49.doi: 10.6040/j.issn.1672-3961.0.2014.122

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Design of the disturbance observer of opto-electronic platform in frequency domain

WEI Wei1,2, DAI Ming1, LI Jiaquan1, MAO Dapeng1, LI Xiantao1,2   

  1. 1. Key Laboratory of Airborne Optical Imaging and Measurement, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, Jilin, China;
    2. Postgraduate Department of Institute of Optics and Fine Mechanics, Graduate University of Chinese Academy of Sciences, Changchun 130033, Jilin, China
  • Received:2014-04-28 Revised:2015-05-29 Online:2015-08-20 Published:2014-04-28

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Abstract: Traditional disturbance observer(DOB) could not guarantee the internal stability of nominal systems and non-minimum phase systems. A new DOB method was proposed in the frequency domain to improve the stability of the system. The compensator was sophisticatedly designed, which circumvented the situation that the denominator of the modulation transfer function was zero. The line of sight (LOS) stabilization experiment showed that the output disturbance residual of the control system was decreased by 75% under the disturbance of 3 degrees, 1 Hz. The proposed method was capable of insuring the internal stability of the system, and could suppress the disturbance effectively with wide bandwidth and rapid frequency response. This method presented an instruction to design the control system of photoelectric stabilized platforms.

Key words: the disturbance isolation, disturbance observer, the nominal plant, robust stability, non-minimum phase plant

CLC Number: 

  • TP273
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