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Method for measuring high frequency micro vibration of triaxial angular displacement of satellite payload

A payload and micro-vibration technology, which is applied to the measurement of micro-vibration, the measurement of high-frequency micro-vibration of three-axis angular displacement on the star, and the high-frequency field of three-axis angular displacement of payload on the star, which can solve the limitation and cannot measure attitude vibration Quantitative information and other issues, to achieve low cost, reduce measurement cost, reduce the effect of instrument accuracy

Active Publication Date: 2011-04-20
BEIJING INST OF CONTROL ENG
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  • Summary
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  • Application Information

AI Technical Summary

Benefits of technology

This new technology uses measurements from an accelerator device called High Frequency Signal (HF) before integration into another system like Computed Tomography or Magnetic Resonance Imaging (MRI). It allows for precise detection of small movements caused by external factors such as gravity waves or other sources during medical imaging procedures without expensive equipment.

Problems solved by technology

This patents discuss various technical problem addressed in this patented technology relating to managing highly precise position measurements over long periods of time while also addressing issues with measuring high-fine pitch vibrations caused by dynamic factors like rotational motions that can degrade image resolution and impact mission capabilities. Current solutions involve either adding weight to the entire system or requiring multiple components mounted separately, leading to increased complexity and cost.

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  • Method for measuring high frequency micro vibration of triaxial angular displacement of satellite payload
  • Method for measuring high frequency micro vibration of triaxial angular displacement of satellite payload
  • Method for measuring high frequency micro vibration of triaxial angular displacement of satellite payload

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Embodiment Construction

[0048] There are two very important indicators for high-resolution detailed investigation of ground reconnaissance satellites: image clarity and resolution. These two indicators are closely related to the design indicators of the control system. In order to ensure image quality, it is generally necessary to put forward requirements on attitude stability. However, there are many ways to refer to attitude stability, and the dimensions include angle and angular velocity. The concept is not clear and the terms are not uniform. For this reason, the present invention defines the attitude vibration as follows: it is the attitude deviation generated by the satellite body in the three-axis direction within the time of taking an image and a pixel, that is, the attitude change produced in a certain time window T interval quantity.

[0049] The concrete implementation of the present invention divides three steps:

[0050] First, accelerometer selection and configuration; second, signal...

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Abstract

The invention relates to a method for measuring high frequency micro vibration of triaxial angular displacement of satellite payload. The method comprises the steps of measuring linear acceleration and utilizing the amplification effect generated by twice integration of a high frequency signal, thus realizing high accuracy measurement at low cost. Analysis shows that an acceleration meter with the accuracy of 10-4g can be adopted for 50Hz angular displacement with the amplitude of 10-6 degrees under the condition of a 1m reference line, thus greatly reducing the accuracy of an instrument and reducing the measurement cost. The invention provides a method for measuring the vibration quantity under two conditions of full time and time window.

Description

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Claims

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Application Information

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Owner BEIJING INST OF CONTROL ENG
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