Electric propulsion thrust measuring and calibrating device

Abstract

The invention relates to the technical field of spaceflight testing, in particular to an electric propulsion thrust measurement and calibration device which comprises a static frame, a movable frame, a balance block, a base, a calibration device and a supporting structure, and the movable frame is fixed to the static frame through the supporting structure and can swing around the supporting structure; the base is arranged between the connecting rods on the two sides of the movable frame; the balance block is arranged on an ejector rod of the movable frame; and the calibration device is fixedly connected with the ejector rod of the movable frame and the ejector rod of the static frame respectively. The supporting form of the movable frame in the balance pendulum type measuring device is mainly improved, an electromagnetic damping structure and an electromagnetic force generating device are designed in an integrated mode, the structure is simple, use is convenient, the device can adapt to thrust measurement of a large-mass electric thruster, the measuring and calibrating device is more compact in structure, implementation of electromagnetic shielding is facilitated, the complexity of the product is effectively reduced, and reliable operation of the measurement and calibration device in a vacuum environment is ensured.

Description

technical field [0001] The present application relates to the technical field of aerospace testing, and in particular, to an electric propulsion thrust measurement and calibration device. Background technique [0002] With the wide application of electric propulsion technology, various types of electric thrusters are being developed. Thrust measurement is one of the necessary items for ground test evaluation during the development of electric thrusters. It can directly show the relationship between electrical parameters and thrust. It is of great significance to the design of electric propulsion space application strategy. Due to the influence of factors such as vibration in the environment, thermal load generated in the operation of electric thrusters, plasma and electromagnetics, etc., the measurement of electric propulsion micro-thrust is full of challenges. [0003] At present, the commonly used electric propulsion thrust measurement principles are divided into torsion ...

AI Technical Summary

Problems solved by technology

Because the measurement is affected by factors such as vibration in the environment, thermal load generated during the operation of the electric thruster, plasma, and electromagnetics, the measurement of electric propulsion micro-thrust is full of challenges

[0003] At present, the commonly used electric propulsion thrust measurement principles are divided into torsional pendulum, single pendulum, cantilever beam structure, inverted pendulum and balanced pendulum. The torsional pendulum is sensitive to temperature, difficult to balance, and has limited load bearing; the single pendulum structure is the earliest application. The structure and sensitivity are related to the length of the swing rod; the structure principle of the cantilever beam is simple, the effect of heat deformation is good, and there is a phenomenon of zero point drift under the influence of the thrust deflection angle; the inverted pendulum structure is widely used in the measurement of high-power thrusters. Instability, poor applicability to different types of thrusters; balanced pendulum structure has the advantages of both inverted pendulum and single pendulum structure, but the commonly used knife-edge support structure cannot adapt to large-mass thrusters and cannot be quickly replaced, requiring a separate The naughty mechanism, the damping and the calibration force are mostly two parts, the overall structure is scattered, and cannot meet the needs of measurement automation

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