Method and device for controlling self-generated torque direction of Hall electric propulsion system

Abstract

The present application discloses a method and device for controlling the self-generated torque direction of a Hall electric propulsion system. According to the mapping relationship, the Hall thruster is excited according to the preset rated excitation current of each excitation coil to obtain the first magnetic field distribution parameter, and the first excitation current equal to and opposite to the rated excitation current is used to excite the Hall thruster. Excite the thruster to obtain the second magnetic field distribution parameter; judge whether the maximum absolute value of the sum of the two measurement results on at least one preset test point is not greater than the preset threshold; if not greater, then establish the rated excitation current and According to the third mapping relationship between the first excitation current and the torque, the excitation current is called according to the third mapping relationship to realize the control of the direction of the torque. The application solves the technical problem of poor performance of the Hall thruster in the prior art.

Description

technical field [0001] The present application relates to the field of spacecraft propulsion technology, in particular to a method and device for controlling the direction of self-generated torque of a Hall electric propulsion system. Background technique [0002] The Hall propulsion system is widely used in missions such as spacecraft orbit transfer, north-south position protection, and all-electric propulsion. The Hall thruster is the core unit of the Hall electric propulsion system, and its working thrust characteristics determine the thrust output characteristics of the system. However, according to its working principle, when the Hall thruster is working, the ions produced by ionization form a plasma jet with a velocity of about 20,000 m / s under the action of the spatially orthogonal electromagnetic field in the acceleration zone. The Lorentz force in the direction of motion deflects the trajectory of the ion, and the thruster will also be affected Reaction force in ...

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Problems solved by technology

[0004] The technical problem solved by this application is: to solve the problem of poor performance of Hall thrusters in the prior art, this application provides a method and device for controlling the self-generated torque direction of Hall electric propulsion system. The embodiment of this application provides In the scheme, by establishing the third mapping relationship between the excitation current and torque of the Hall thruster, and calling the excitation current through the third mapping relationship to control the direction of the self-generated torque of the Hall thruster, it not only realizes the offset of the self-generated torque, but also reduces The torque accumulation interferes with the attitude control of the spacecraft and reduces the burden on the momentum unloading device of the spacecraft, and also avoids changing other thrust characteristic parameters of the thruster during the self-generated torque offset process, thereby improving the performance of the Hall thruster

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