Combined control method for performing station keeping and momentum wheel unloading based on electric thruster

Abstract

The invention discloses a combined control method for performing station keeping and momentum wheel unloading based on an electric thruster. The thrust vector direction regulating range of the electric thruster is limited by the mechanisms and on-satellite mounting space thereof, when keeping the satellite orbit position or unloading the momentum wheel, the electric thrusting is incapable of guaranteeing that the thrust direction completely meets control requirements, and the component of the thrust on the vertical surface for controlling the needed force would become into the extra consumption for using the electric thruster to perform control. When performing station keeping, if the thrust vector cannot pass through the mass center of the satellite, the moment generated by the thrust would become into extra consumption; and in turn, when only performing the momentum wheel unloading, an operator needs to take the extra force effect into account, symmetrical ignition should be used to counteract the extra force, and the force effect becomes into extra consumption during the unloading period. The combined control method for performing the station keeping and momentum wheel unloading based on the electric thruster simultaneously performs satellite station keeping and momentum wheel unloading through reasonably selecting the thruster and regulating the thrust vector direction.

Description

technical field [0001] The invention relates to a combined control method for position protection and momentum wheel unloading based on an electric thruster, and belongs to the technical field of satellite control. Background technique [0002] In the past ten years, electric propulsion technology has developed rapidly. At present, electric propulsion has been widely used in the orbital position control of GEO satellites, including Boeing's 601 satellite platform and 702 platform, Lockheed Martin's A2100 platform, Lora Space's LS3000 platform, Astrium's EUROSTAR-3000 platform, ESA's Artemis satellite etc. [0003] The development of the all-electric propulsion platform further expands the application of electric propulsion in satellite control. In the configuration of the propulsion system of the all-electric push platform, electric propulsion is the main or even the only way. Therefore, the all-electric push platform will not only use electric propulsion for small-thrust ...

AI Technical Summary

Problems solved by technology

Due to the limited number of electric thrusters, for the all-electric push platform, all the electric thrusters are installed on the back floor close to the Y-axis direction of the body. Therefore, if the position protection control or unloading control is performed separately, since the thrust has components in other directions, it cannot Avoid the problem of useless consumption, which will lead to a decrease in the efficiency of the electric thruster, a waste of propellant, and the inability to achieve efficient satellite control

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