Vertical pendulum type micro-small thrust test board device, calibration method and weak force testing method

A calibration method and a technology of a test bench are applied to measuring devices, force/torque/work measuring instruments, and measurement of balance forces using forces, which can solve problems such as complex structures and low measurement accuracy, to ensure measurement accuracy and simplify Effects of structure and method of operation

Pending Publication Date: 2021-03-16
INNOVATION ACAD FOR PRECISION MEASUREMENT SCI & TECH CAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a vertical pendulum micro-thrust test bench device and a calibration method for weak force testing to solve the technical problems of low measurement accuracy and complex structure in the prior art

Method used

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  • Vertical pendulum type micro-small thrust test board device, calibration method and weak force testing method
  • Vertical pendulum type micro-small thrust test board device, calibration method and weak force testing method
  • Vertical pendulum type micro-small thrust test board device, calibration method and weak force testing method

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Experimental program
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Effect test

Embodiment 1

[0058] Embodiment 1 of the present invention provides a vertical pendulum micro-thrust test bench device, please refer to figure 1 and figure 2 As shown, the vertical pendulum micro-thrust test bench device includes a vacuum container 1, an outer frame 2 and one or two test bench units 3 arranged on the outer frame 2.

[0059] Wherein, the vacuum container 1 has an accommodating chamber 1a, and the outer frame 2 is arranged in the accommodating chamber 1a and fixed on the inner wall of the vacuum container 1 .

[0060] Wherein, the test bench unit 3 includes: a test bench frame 31 fixed to the outer frame 2 , a vertical pendulum body 32 , a calibration voice coil motor 33 , a feedback voice coil motor 34 , a propeller 35 and a micro-displacement measuring instrument 36 .

[0061] Specifically, the test bench frame 31 includes a first frame body 311 extending vertically and a second frame body 312 vertically arranged with the first frame body 311, please refer to figure 1 sh...

Embodiment 2

[0083] Embodiment 2 of the present invention provides a calibration method for weak force testing, which is used to calibrate the vertical pendulum type micro-thrust test bench device in Embodiment 1. The calibration method includes the following steps:

[0084] S201, adjust and calibrate the current of the first coil in the voice coil motor, so that the energized first coil exerts a first standard weak force on the vertical pendulum under the action of the magnetic field of the first permanent magnet;

[0085] S202, adjusting the current of the second coil in the feedback voice coil motor, so that the energized second coil exerts a first feedback weak force on the vertical pendulum under the action of the magnetic field of the second permanent magnet, wherein the first feedback is weak The force and the first standard weak force act together to make the vertical pendulum body in a balanced state;

[0086] S203. Calculate a first calibration coefficient according to the relati...

Embodiment 3

[0099] Embodiment 3 of the present invention provides a weak force test method, which uses the above-mentioned vertical pendulum type micro-thrust test bench device for weak force test, and the test method includes the following steps:

[0100] S301, start the propeller to apply the thrust to be tested to the vertical pendulum body.

[0101] S302, adjust the current of the second coil in the feedback voice coil motor, so that the third feedback weak force exerted on the vertical pendulum body by the energized second coil under the magnetic field of the second permanent magnet, wherein the third feedback The weak force and the thrust to be tested of the propeller act together to make the vertical pendulum body in a balanced state.

[0102] S303. Calculate the thrust to be tested of the thruster according to the current of the second coil and the first calibration coefficient.

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Abstract

The invention relates to the technical field of weak force testing, and concretely relates to a vertical pendulum type micro-small thrust test board device, a calibration method and a weak force testing method. The vertical pendulum type micro-small thrust test board device comprises a vacuum container, a test board frame, a vertical pendulum body, a feedback voice coil motor, a calibration voicecoil motor and a micro-displacement measuring instrument, and a propeller is arranged at the lower end of the vertical pendulum body. By means of the mode, when the vertical pendulum body is in a balanced state, the micro-propelling force and the feedback weak force which are applied to the vertical pendulum body by the propeller and the feedback voice coil motor respectively have a linear relation, and the structure and the operation method are simplified under the condition that the testing precision is guaranteed; and when the vertical pendulum body is in the balanced state, the calibrationvoice coil motor and the feedback voice coil motor respectively apply a linear relationship to the directions of the standard weak force and the feedback weak force applied to the vertical pendulum body, and the calibration voice coil motor can calibrate the feedback weak force of the feedback voice coil motor, so that the measurement precision of the device is ensured.

Description

【Technical field】 [0001] The invention relates to the technical field of weak force testing, in particular to a vertical pendulum micro-thrust test bench device, a calibration method and a weak force testing method. 【Background technique】 [0002] Micro-thrusters with micro-newton resolution and higher precision have important applications in high-precision space experiments. In space missions such as high-precision deep space exploration and space satellite formation flight, the requirements for the accuracy of satellite attitude control and orbit control are getting higher and higher, and the actuators controlled are high-precision space micro-propellers. It is an extremely important part of the mission, and its performance also determines the execution quality and even success of the space mission. In addition, in projects such as the space gravitational wave detection plan, satellite gravity field measurement, space equivalence principle test, and space microgravity vib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L5/00G01L1/08
CPCG01L1/086G01L5/0038
Inventor 涂海波刘坤孙恒胡明柳林涛
Owner INNOVATION ACAD FOR PRECISION MEASUREMENT SCI & TECH CAS
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