Line vibration measurement-based satellite engine on-orbit thrust real-time calibration method

Abstract

The invention provides a line vibration measurement-based satellite engine on-orbit thrust real-time calibration method. According to the line vibration measurement-based satellite engine on-orbit thrust real-time calibration method, ground line vibration test data are adopted to correct a response simulation finite element model, and a transfer function between thrusts and line vibration is calibrated; interference elimination is performed on the basis of simulation result data and on-orbit test data, so that line vibration response caused by an engine on-orbit thrust can be obtained; engineon-orbit thrust inversion is carried out through using the transfer function between the thrusts and the line vibration; and the engine on-orbit thrust is calibrated in real time. The method of the invention can be widely applied to the real-time calibration of the on-orbit thrusts of various types of engines / thrusters of various spacecrafts and can facilitate the strategy correction and optimization of orbital control and attitude control which are performed by spacecrafts in an on-orbit manner.

Description

technical field [0001] The invention relates to a method for real-time calibration of thrust, in particular to a method for real-time calibration of on-orbit thrust of a satellite engine based on linear vibration measurement. Background technique [0002] When the satellite is in orbit, the thrust of the engine changes due to the change of the gas-liquid state, which makes the orbit maintenance and orbit change operation of the satellite more risky, especially when the mass characteristics of the satellite are changed due to the consumption of propellant. Changes make satellite manipulation in orbit extremely risky, and even relate to the success or failure of high-precision satellites. However, at this stage, there is no effective calibration method for the thrust of the satellite engine in orbit, which makes there are certain risks in satellite orbit change and orbit maintenance, especially when the satellite inertia and thrust are relatively small, and the satellite needs...

AI Technical Summary

Problems solved by technology

[0002] When the satellite is in orbit, the thrust of the engine changes due to the change of the gas-liquid state, which makes the orbit maintenance and orbit change operation of the satellite more risky, especially when the mass characteristics of the satellite are changed due to the consumption of propellant. Changes make the satellite's in-orbit manipulation very risky, even related to the success or failure of high-precision satellites

However, at this stage, there is no effective calibration method for the thrust of the satellite engine in orbit, which makes there are certain risks in satellite orbit change and orbit maintenance, especially when the satellite inertia and thrust are relatively small, and the satellite needs to have a long period of orbital maneuvering or relatively large Real-time calibration of the on-orbit thrust of the satellite engine is extremely important during the orbit change operation, and it is an important issue that must be paid attention to and related to the success or failure of the satellite.

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