Two-dimensional pointing mirror imaging tracking image servo control method

Abstract

Disclosed is a two-dimensional pointing mirror imaging tracking image servo control method. The two-dimensional pointing mirror imaging tracking image servo control method comprises collecting the azimuth axis angle and the pitch axis angle of a two-dimensional pointing mirror as angle position measurement feedback signals, and collecting the offset of a CCD (charge coupled device) camera focal plane target as image information feedback; calculating increment required by an axis tracking target of the two-dimensional pointing mirror, and establishing a tracking differentiator; simplifying a voice coil motor stator coil model into an RL (resistance-inductance) network, defining axis parameter estimation errors of the two-dimensional pointing mirror, performing computation to obtain speed equivalent control quantity, angular speed tracking errors and axis current equivalent control quantity, and further to obtain the axis voltage control quantity of the two-dimensional pointing mirror to generate driving signals and to complete servo control. The two-dimensional pointing mirror imaging tracking image servo control method is based on image feedback information, thereby, compared with pure two-dimensional pointing mirror angle position servo control, adding image feedback information, improving the measuring precision and having the advantage of high control precision.

Description

technical field [0001] The invention relates to the technical field of servo control, in particular to an image servo control method for two-dimensional pointing mirror imaging tracking. Background technique [0002] In recent years, many optical remote sensing instruments launched at home and abroad have used pointing or scanning devices to increase the field of view and reduce re-entry time, and they are in good orbit. The US GOES (Geosynchronous Environmental Satellite) series are meteorological satellites in geosynchronous geostationary orbit, the US Landsat (Land Satellite) series are sun-synchronous orbit resource satellites, TM (Main Mapper) on Landsat-4 and 5, French SPOT-5 The two identical HRG (High Resolution Geometry) cameras carried by the earth resources remote sensing satellite in sun-synchronous orbit, and the Advanced Space Thermal Emission and Reflected Radiometer (ASTER) carried by the international cooperation project Earth Observation System (EOS) are eq...

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, to provide an image servo control method for two-dimensional pointing mirror imaging tracking, and to solve the problem of low accuracy of the existing control technology based on angular position measurement information, have good use value

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