On-track continuously focusing closed-loop dynamic simulation test method for astronautic optical remote sensor

Abstract

The invention provides an on-track continuously focusing closed-loop dynamic simulation test method for an astronautic optical remote sensor. According to the method, an on-track continuously dynamically focusing closed-loop simulation test system for the astronautic optical remote sensor is composed of an optical imaging target, a collimator (containing a light source), a vacuum testing loading jar, an effective load central control simulation system, an imaging parameter automatic correcting system, an image collecting and recording device, an image processing and defocusing amount analysis identifying system and the like; the devices or systems are directly or indirectly connected with the astronautic optical remote sensor; the processing capacity of continuously dynamically focusing, the instantaneity of response, the continuity, the stability and the main properties of tracking and focusing a moveable mechanism of the whole astronautic optical remote sensor under a vacuum environment are detected and checked; and the performance parameters of the best CCD (Charge Coupled Device) focal plane position under the conditions of different temperatures, different distances and heights and different luminance are confirmed.

Description

technical field [0001] The invention belongs to the field of industrial automation and relates to a closed-loop dynamic simulation test method for on-orbit continuous focusing of an aerospace optical remote sensor. Background technique [0002] The aerospace optical remote sensor is the core equipment of the payload system of all aerospace vehicles such as artificial satellites, space stations, and deep space planetary probes. According to the ground remote control command center, commands and parameters are issued to these payload systems, and the optical imaging system is controlled to complete the observation of the ground, Camera missions on the surface of the Moon and other deep-space planetary surfaces. The quality of the optical imaging system directly affects the image acquisition effect of aerospace optical remote sensors. According to different conditions and environmental changes, maintaining the best focal plane position of optical imaging has always been one of ...

AI Technical Summary

Problems solved by technology

Generally, there are three main factors that affect the focal plane. First, due to the thermal expansion of optical materials and changes in optical properties, the structural parameters of the camera lens are changed, and even the distortion of the supporting structure of the optical lens is caused, which changes the position of the focal plane of the camera. , resulting in defocusing, temperature-affected focusing needs to be carried out; the second is that the height of the aerospace optical remote sensor from the earth, the moon or other planetary surfaces changes greatly during the orbit-changing flight of the spacecraft, and imaging distance change adjustment is required. The third is that the aerospace optical remote sensor is accompanied by a large vibration at the moment of rocket lift-off or during orbit change, which may cause slight changes in the structure of the optical lens or individual components, affecting the slight movement of the focal plane position, requiring displacement to affect focus adjustment

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