Multi-level micro-vibration system testing method and system

Abstract

A multi-level micro-vibration system testing method and a system are provided; the method comprises the following steps: carding and classifying micro vibrations; building a related testing system according to different features of micro-vibration sources, and carrying out a single-machine level micro-vibration test so as to learn micro-vibration source features, or transmission features of a micro-vibration vibration isolator; building a sub-system micro-vibration testing system, developing a sub-system level micro-vibration test so as to learn about the micro-vibration source and boundary condition coupling features and micro-vibration system transmission features; building a system-level micro-vibration testing system, and developing a system-level micro-vibration test so as to learn about the micro-vibration influences on an optical system; finally using a satellite in-orbit test phase to develop a large system-level micro-vibration test, thus fully verifying micro-vibration related analysis and designs. The method fully considers various nodes affected by micro-vibration, can fully solve the micro-vibration problems, thus effectively preventing problems that a conventional method is single-machine, single-subject, and a local test cannot solve the system problems; the multi-level micro-vibration system testing method and system fill the technical blanks in related fields in our nation.

Description

technical field [0001] The invention relates to a test method for the influence of various micro-vibrations of high-resolution remote sensing satellites on the imaging quality of payloads such as optical cameras, and belongs to the field of system-level multidisciplinary test verification. Background technique [0002] Micro-vibration refers to the small amplitude of the spacecraft caused by the normal operation of the equipped equipment (such as high-speed rotating parts such as momentum wheels, stepping parts such as solar wing drive mechanisms, and swinging parts such as infrared camera swing mirrors) during the spacecraft’s orbital operation. reciprocating motion. Micro-vibration source refers to the equipment that causes micro-vibration. The micro-vibration energy is very small, compared with the strain caused by the mechanical environment of the launch section, the micro-vibration is at least one order of magnitude smaller, and will not cause structural damage. In ad...

AI Technical Summary

Problems solved by technology

③ Difficulty in control: The micro-vibration amplitude is small and the frequency is high, the attitude control system is difficult to measure, and it cannot be controlled in the whole frequency band; in addition, the micro-vibration covers a wide frequency band, and it is basically impossible to control it by one means

[0007] (1) There is no system-level test concept, and the test is often aimed at local problems, so the test results often only solve local problems and cannot solve system problems;

[0008] (2) There are many tests on micro-vibration sources, and there is no or slight involvement in the micro-vibration transmission, the impact of micro-vibration on imaging quality, and the evaluation of on-orbit micro-vibration;

[0009] (3) The micro-vibration test is only considered from a mechanical point of view, without considering the influence of other subsystems such as control and optics involved in micro-vibration;

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