Micro-thrust measuring device with on-line calibration and locking functions

Abstract

The invention relates to a micro-thrust measuring device with on-line calibration and locking functions. The micro-thrust measuring device is used for the parameter testing of the ground long-life test of a Hall effect thruster. In order to measure the real-time thrust value of the Hall effect thruster under a plurality of working conditions in the long-life test process of the Hall effect thruster, a thruster to be tested is installed on a movable frame; the movable frame swings with low amplitude under the action of the thrust of the Hall thruster; the displacement sensor of an electromagnetic feedback assembly performs detection; swing displacement signals are inputted into a PID feedback control circuit; and an electromagnetic feedback force is in linear relation with coil current outputted by the PID circuit; the static characteristic of a thrust frame is calibrated through a standard mass weight in advance, so that the magnitude of the thrust can be obtained. According to the device of the invention, the electromagnetic feedback force method is adopted to carry out multi-times and multi-working-condition real-time on-line measurement on the Hall effect thruster; an on-line calibration and locking device is adopted to lock and unlock the micro-thrust measuring device a plurality of times, so that the static characteristic of the micro-thrust measuring device is obtained inreal time, and the accuracy and reliability of a thrust test are ensured.

Description

technical field [0001] The invention belongs to the field of long-life ground test parameter measurement of an electric thruster, and relates to a Hall thruster thrust measurement device with multiple real-time on-line calibration and locking functions. Background technique [0002] Electric propulsion is a kind of advanced propulsion method that uses electric energy to directly heat the propellant or ionize and accelerate the propellant to obtain propulsion power. It has high specific impulse, thrust and efficiency. It is used in spacecraft orbit control, deep space exploration and It has broad application prospects in space missions such as interstellar navigation. Among them, the Hall effect thruster has been widely used in many aspects such as GEO satellite orbit transfer, position maintenance and deep space exploration due to its high performance, reliable operation and mature technology. [0003] The measurement of the thrust value during the long-life ground test of ...

AI Technical Summary

Problems solved by technology

Since the traditional small thrust measuring devices of electric thrusters mostly use measuring devices such as electromagnetic balances, and the online calibration and locking of the thrust measuring devices cannot be realized, the thrust measuring devices cannot be obtained in real time many times during the ground long-life test of the thruster. static characteristics

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