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[mu]N-level microthrust testing system and testing method

A test system and micro-thrust technology, applied in the field of physical mechanics, can solve the problems of insufficient measurement accuracy and bandwidth, and difficulty in measuring micro-thrust and micro-impulse at the same time, so as to reduce environmental impact, reduce test waiting time, and improve measurement accuracy.

Active Publication Date: 2018-01-26
INST OF MECHANICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing micro-thrust measurement technology has insufficient measurement accuracy and bandwidth, making it difficult to simultaneously measure micro-thrust and micro-impulse

Method used

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  • [mu]N-level microthrust testing system and testing method
  • [mu]N-level microthrust testing system and testing method
  • [mu]N-level microthrust testing system and testing method

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Embodiment Construction

[0037] Such as figure 1 , 2 As shown, the micro-new micro-thrust test system of an embodiment of the present invention generally includes a stand 10 as a mounting base, a cantilever 20 installed on the stand 10, a damping device 30 installed on the cantilever 20, a thrust force The device 40, the displacement measuring device 50 and the calibration device 60, as well as the vacuum chamber 70 providing a vacuum environment and the control unit 80 controlling the testing process.

[0038] The cantilever 20 has a lath-like structure, and is connected to the stand 10 through a flexible shaft 22 at a center of symmetry, so that both ends of the cantilever 20 can swing horizontally relative to the stand 10 with the flexible shaft 22 as a fulcrum. The connecting structure of the cantilever 20 and the stand 10 can be: the first support 11 is fixed on the upper surface of the stand 10, the second support 21 opposite to the first support 11 is fixed on the lower surface of the cantilev...

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Abstract

The invention provides a [mu]N-level microthrust testing system and testing method. The system herein includes: a rack; a cantilever which is connected to the rack through a flexible shaft; a dampingapparatus which prevents the cantilever from horizontally swinging by using electromagnetic resistance; a thrust apparatus which is installed at one end of the cantilever; a displacement measuring apparatus which is installed at another end of the cantilever, and a calibration apparatus which is intended for calibrating the horizontal swinging of the cantilever through magnetic repulsion; a vacuumchamber which is intended for providing vacuum environment for the aforementioned device; and a control unit which is intended for receiving and controlling measurement process. According to the invention, the system is applicable to testing thrust having a thrust-weight ratio from 10-7 to 10-4, and can greatly increase measurement precision when measurement bandwidth is sufficient. In addition,the system can reduce impact by the environment, greatly reduces time for waiting tests, and increases measurement times.

Description

technical field [0001] The invention relates to the field of physical mechanics, in particular to a device capable of measuring 1 to 3000uN with a thrust-to-weight ratio of 10. -7 ~10 -4 Thrust test system for microthrusters in the range. Background technique [0002] The characteristic of micro thrusters is that the thrust is relatively small, and the thrust is generally below several hundred millinewtons. It is difficult to accurately measure such a small thrust. For microthrusters, it can also work in pulses, so there is not only the problem of how to measure small thrusts, but also the pulse impulse. In order to shorten the test preparation time and reduce the influence of environmental noise, the damping of the bench must be considered; in order to avoid the zero drift of the long-term test, the problem of online calibration thrust must be considered. Therefore, thrust measurement technology with high precision and high environmental reliability is one of the technol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/14
Inventor 李飞郭大华余西龙
Owner INST OF MECHANICS - CHINESE ACAD OF SCI
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