On-orbit calibration method for micro electric propulsion thrust

Abstract

The invention discloses an on-orbit calibration method for micro electric propulsion thrust. The on-orbit calibration method comprises the steps: calculating change of a semi-major axis in the rail ascending and descending processes; theoretically analyzing the influence of earth shape perturbation and atmospheric resistance perturbation in the orbit ascending and descending processes; obtaining the thrust acceleration by combining a semi-major axis variation formula obtained through calculation in the rail lifting process and the rail descending process; and obtaining electric thrust according to the thrust acceleration and the satellite mass. According to the scheme, the thrust does not need to be obtained through posture or angular velocity change conversion, that is, a thruster does not need to be eccentrically installed to generate eccentric torque to change the posture or the angular velocity, and the influence of earth shape perturbation and atmospheric resistance perturbation which are close to the magnitude of the thrust of a micro thruster on thrust calibration is eliminated, and on-orbit thrust calibration of the single thruster mounted through the mass center can be realized.

Description

technical field [0001] The invention belongs to the field of on-orbit calibration of electric propulsion thrust, in particular to an on-orbit calibration method of miniature electric propulsion thrust. Background technique [0002] Micro-electric propulsion has the advantages of small size, light weight, large specific impulse, and high total impulse. It has been more and more widely used in the field of commercial aerospace in recent years. However, the general thrust of micro-electric propulsion products is in the order of tens or hundreds of micronewtons. Due to the limitation of the ground environment, it is difficult to establish the temperature and pressure conditions on the ground consistent with the space environment; and it is also limited by the ground measurement methods. It is difficult to achieve accurate calibration of the thrust of micro electric thrusters. In order to ensure the effectiveness of on-orbit operation of micro electric thrusters, on-orbit calibr...

AI Technical Summary

Problems solved by technology

However, it is only applicable to the installation of multiple thrusters and each thruster cannot be installed above the center of mass of the satellite, which cannot meet the on-orbit calibration of the thrust of a single thruster installed over the center of mass

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