Measuring platform for aerospace microthruster impulse based on torsion balance

Abstract

The invention relates to a spaceflight micro-thruster impulse measurement table based on a torsion balance. The invention aims to develop a measurement device for measuring the spaceflight micro-thruster impulse with the torsion balance principle. The spaceflight micro-thruster impulse measurement table comprises a measurement table base, a torsion balance bench, a calibrator and a linear displacement measurer. An impulse generated by a spaceflight micro-thruster is in mechanical connection with the torsion balance bench through a thruster, and is transmitted to the torsion balance bench. A crossbeam of the torsion balance bench rotates around the axis of a pivot, and the pivot generates restoring moment which enables the crossbeam to repeatedly swing left and right at an initial balance position. The calibrator calibrates the swing period of the crossbeam of the measurement table. The linear displacement measurer measures the maximum swing angle linear displacement of the crossbeam. The pulse is calculated through the swing period, the maximum swing angle linear displacement, a torsional rigidity coefficient, a distance from a linear displacement measurement point to a pivot rotary shaft and a moment arm length. A unit system of the invention can bear a large load, is strong in distinguishing capability, high in measurement precision and short in measurement period, and can achieve micro-impulse measurement of micro-Newton*second-magnitude and kilogram-grade spaceflight micro-thrusters.

Description

technical field [0001] The invention belongs to the field of space propulsion technology, and relates to an aerospace micro-thruster impulse measurement technology, in particular to an aerospace micro-thruster impulse measurement platform based on a torsion balance. Background technique [0002] The development of micro-satellite and satellite constellation technology is inseparable from the support of power system technology. Aerospace micro-thruster is the most important working unit of its power system. Its performance measurement and evaluation work is very important. The most important. The range of impulse generated by aerospace micro-thrusters is usually in the range of 10 -7 ~10 -4 Between N·s, the measurement requires large load, strong resolution, high precision, and short cycle, and the measuring device needs to be specially designed to meet the requirements. [0003] At present, the torsion balance structure is a micro-impulse measurement structure commonly us...

AI Technical Summary

Problems solved by technology

[0007] The invention proposes a torsion balance-based aerospace micro-thruster impulse measurement device, based on the torsion balance measurement principle, realizes the measurement of micro-newton-second-level kilogram-level aerospace micro-thruster impulse measurement, and solves the measurement range of the existing impulse measurement device Problems such as small size, low resolution, small load, external influence on measurement, and time and cost consumption of off-line control measurement devices

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