Ultra-low frequency high-accuracy micro-vibration measuring system

A measurement system and high-precision technology, applied in vibration test, measurement device, measurement of ultrasonic/sonic/infrasonic waves, etc., can solve problems such as the failure to meet the vibration test requirements of the solar wing drive mechanism and the low accuracy of piezoelectric force sensors, Achieve the effect of improving measurement accuracy, improving adaptability, and overcoming lower accuracy

Inactive Publication Date: 2013-09-25
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the piezoelectric force sensor has low accuracy in the low frequency region and cannot meet the test requirements for the vibration of the solar

Method used

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  • Ultra-low frequency high-accuracy micro-vibration measuring system

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Embodiment Construction

[0024] like figure 1 , figure 2 and image 3 As shown, an ultra-low frequency high-precision micro-vibration measurement system includes: a base 1, a force measuring device 2, a dynamic strain gauge 3, and a data acquisition and processing system 4; the force measuring device 2 consists of four strain gauge force sensors 5, four The adapter block 6 and the load plate 7 are composed; the four adapter blocks 6 are respectively located on the four side surfaces of the base 1, and each adapter block 6 is tightened on the side surface of the base 1 by three bolts; the four strain The strain gauge force sensor 5 is located between the upper surface of the four adapter blocks 6 and the lower surface of the load plate 7, and each strain gauge force sensor 5 is respectively tightened on the upper surface of the adapter block 6 and the lower surface of the load plate 7 by four bolts. Surface; the four strain gauge force sensors 5 are composed of three parts with the same shape, two o...

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Abstract

The invention discloses an ultra-low frequency high-accuracy micro-vibration measuring system which is composed of a base, four adapter blocks, four strain-type force sensors, a load disc, a dynamic strain indicator, 48 strain gages and a data collecting and processing system. The strain gages are pasted on the strain-type force sensors. The strain-type force sensors are located between the load disc and the adapter blocks and are connected between the load disc and the adapter blocks in a tightened mode through bolts. The adapter blocks are located on the side surface of the base and connected with the side surface of the base in a tightened mode through bolts. Three dynamic forces and three dynamic force moments of a disturbance source are measured through the fact that the strain gages pasted on the strain-type force sensors are reasonably combined and connected with the dynamic strain indicator to form 12 full bridge circuits. The disturbance source can be installed inside the measuring system and can also be installed outside the measuring system. The strain gages are connected with the dynamic strain indicator through wires. The dynamic strain indicator is connected with the data collecting and processing system through a wire. The ultra-low frequency high-accuracy micro-vibration measuring system can accurately measure the vibratory force and the vibratory force moment of a tiny disturbance source, the measured frequency range is accurate to 0Hz, and the measuring reliability is high.

Description

technical field [0001] The invention relates to an ultra-low frequency and high-precision micro-vibration measurement system, which can be used for dynamic measurement of vibration signals of micro-disturbance loads inside a spacecraft on six degrees of freedom. Background technique [0002] Most of the current spacecraft are large-scale flexible deployment mechanisms with a large number of optical elements, which have high requirements for pointing accuracy and stability. In addition, in the attitude control system of modern spacecraft, reaction wheels, single-frame moment gyroscopes and solar wing drive mechanisms are important components in the control system. While they provide the necessary control power, they will also cause some harmful vibrations ( For simplicity, the above three systems are collectively referred to as disturbance sources below). These disturbances are mainly caused by flywheel unbalance, bearing disturbance, motor disturbance, motor drive error, et...

Claims

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Application Information

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IPC IPC(8): G01H11/06G01M7/02
Inventor 陈江攀程伟王云峰
Owner BEIHANG UNIV
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