Optical profiletype simulate vibration movement platform device for space laser communication

Abstract

The invention relates to a libration simulator for a space laser communicating platform and is provided with a laser emission unit (6), an optical power adjusting unit (7), a beam servounit (8), a beam extending unit (9), a communicating optical transmitter and receiver (10) for the tested laser, a beam servo drive unit (11), a DA transfer card (12), a power spectrum generating unit (13) and an optical table (14). The invention can simulate on low frequency agitation and high frequency libration and can effectively inspect and verify the APT tracing precision of a space laser communicating system. A simulative bandwidth can reach to 100Hz, the maximum simulative extent of low frequency can reach to 20mrad, and the controlling precision of high frequency extent can reach to Mu rad magnitude. The invention has broader dynamic range, can librate randomly according to the wide spectrum of a power spectrum simulative platform, can also simulate the movement of a relative angle and sinusoidal excitation, and can detect on the dynamic lag error of the APT system, realize two-dimensional libration simulation, realize optical power adjusting and big caliber parallel beam emission and meet the test requirement for the tracing precision of the space laser communicating APT.

Description

technical field [0001] The invention belongs to the field of space laser communication and computer semi-physical simulation, and relates to a vibration simulation device for a space laser communication carrying platform. Background technique [0002] For space laser communication systems, the vibration of the carrying platform (satellite, aircraft) is the most important source of error affecting the tracking accuracy of space laser communication acquisition, alignment, and tracking systems (Acquisition, Pointing, Tracking, APT). The vibration of the carrying platform has the following characteristics: it is the superposition of continuous wide-spectrum vibration and individual discrete spectra, mainly based on continuous vibration power spectrum; the bandwidth of continuous vibration power spectrum can be extended to 30-100 Hz, and the vibration amplitude angle of low frequency (less than 10 Hz) is relatively small. Large, while the high-frequency (greater than 20Hz) vibrat...

AI Technical Summary

Problems solved by technology

Because the structure of this simulation vibration physical platform is limited by system resonance frequency, load moment of inertia, driving capacity, etc., it can only simulate low-frequency disturbances (below 10Hz), and cannot simulate medium-frequency (10-50Hz) and high-frequency (50-100Hz) vibrations. The medium and high frequency bands are precisely the most important factors affecting the tracking accuracy of APT.

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