A test method for a camera shutter micro-vibration physical simulation test processing system

Abstract

A camera shutter micro-vibration physical simulation test processing system and its test method are composed of a data acquisition system, a six-component eight-sensor vibration force test bench, an adapter board, an acceleration sensor, a camera shutter device and its controller, and a display. The camera shutter device is installed on the six-component eight-sensor test bench through an adapter plate, and an acceleration sensor is arranged on the camera shutter according to the test requirements. When the camera shutter is working, it will produce a small disturbance to the six-component eight-sensor disturbance force test bench. The data acquisition system collects the eight sensor signals of the six-component eight-sensor disturbance force test bench and obtains the disturbance force through a series of calculations. At the same time, it also collects the signals of the acceleration sensor to obtain the acceleration.

Description

technical field [0001] The invention relates to a camera shutter micro-vibration testing method, which can be used for dynamic measurement of the vibration signals of the micro-disturbance load of the spacecraft camera shutter device on six degrees of freedom. Background technique [0002] The camera shutter is the main component of satellite imaging, used to control the length of exposure time. Due to mass imbalance, bearing manufacturing defects, and motor noise, the shutter produces periodic and broadband micro-disturbance forces on the stars. These disturbance forces are modulated and amplified by their internal dynamic characteristics, and will affect remote sensing satellites (GF-4) The pointing accuracy and stability of the optical path have a great influence. This effect is particularly important considering that the shutter device is installed near the imaging device. There are many factors to be considered when establishing the shutter disturbance model, such as ...

AI Technical Summary

Problems solved by technology

There are many factors that need to be considered when establishing the shutter disturbance model, such as the rotational speed, bearing collision harmonics and the dynamic characteristics of its internal structure, and the influence of the dynamic characteristics of the installation structure, which makes the establishment, calibration and inspection of the model quite difficult.

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