Unlock instant, AI-driven research and patent intelligence for your innovation.

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 high-frequency micro-vibration of three-axis angular displacement on the star, high-frequency and micro-vibration measurement of three-axis angular displacement of the payload on the star, and can solve the problem that the attitude vibration information cannot be measured , limitations and other issues, to achieve the effect of high-precision measurement and low cost

Active Publication Date: 2012-06-13
BEIJING INST OF CONTROL ENG
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the attitude measurement sensors (star sensors, gyroscopes, etc.) of domestic satellites in orbit cannot measure the attitude vibration information due to the limitation of sensitivity and bandwidth.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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

Examples

Experimental program
Comparison scheme
Effect test

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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

technical field [0001] The invention relates to a method for measuring high-frequency micro-vibrations of three-axis angular displacements on satellites, and is applicable to high-frequency triaxial angular displacements (frequency beyond the bandwidth of satellite control systems, usually greater than tens of Hz) and micro-vibrations (arc seconds) of payloads on satellites. The measuring method belongs to the technical field of high-precision and high-stability attitude control of spacecraft. Background technique [0002] Large and complex satellites, such as those represented by 0.1m very high-resolution earth observation and 1:10000 three-dimensional mapping, are multi-functional, high-performance large-scale systems. These complex satellites often present a typical large-scale multi-body flexible space structure, which is mainly manifested in the following aspects: multi-function and high performance require an increasing proportion of payloads, and public cabins such as...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01H17/00G01C1/00G01P15/18
Inventor 黎康刘一武杨孟飞牟小刚张勇智张芸香
Owner BEIJING INST OF CONTROL ENG