Coarse Tracking Technology of Coude-type Laser Communication Terminal

doi:10.3969/j.issn.1000-1093.2021.09.014

Abstract

Abstract: Since telescopic units and Coude mirrors move relative to the CCD detectors in the Coude-type laser communication terminal，the optical path structure of the whole system will change with the change in posture of communication terminal，which leads to the increased control difficulty of laser communication terminal system. To solve this problem，a CCD angle measurement model of the Coude-type laser communication terminal is established and deduced by using matrix optics method，and the control algorithm is optimized on this basis. Firstly，the experimental conditions are set up，and the angle measurement model is statically verified by using the measured data. The static calculation accuracy is better than 9 μrad. Then an automatic tracking algorithm based on the model is designed. The standard deviation of measured dynamic tracking error is better than 21 μrad（1σ） by adding sinusoidal disturbance signal with angular velocity of 0.1°/s and amplitude of 0.1° to meet the requirement of laser communication for tracking accuracy of 50 μrad（1σ） .

Key words: lasercommunicationterminal, Coude-typeopticalpath, chargecoupleddevice, anglemeasurementmodel, pointing, acquisitionandtracking

CLC Number:

TN929.13

BAI Yangyang, CHEN Libing, MENG Lixin, ZHANG Leyi, ZHANG Lizhong. Coarse Tracking Technology of Coude-type Laser Communication Terminal[J]. Acta Armamentarii, 2021, 42(9): 1931-1939.

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