In-orbit autonomous shutdown control method of spacecraft propulsion system

Abstract

The invention discloses a method for controlling the in-orbit autonomous shutdown of a spacecraft propulsion system, which comprises a pressure-speed shutdown control mode: in the process of performing orbit control, measuring the storage tank pressure P by a pressure sensor; determining the thrusting force coefficient k through an in-orbit calibration on the ground; calculating the speed increment delta-v generated in each software cycle delta-T for the propulsion system when a satellite receives an orbit control command sent from the ground, wherein delta-v=(F.delta-T) / m=(k.P.delta-T) / m; and accumulating the delta-v, and comparing the same with the 'speed increment' v in the ground orbit control command, wherein if the accumulated result of the delta-v is more than or equal to the 'speed increment' v in the ground orbit control command, the propulsion system is controlled to perform shutdown. The method uses two shutdown control modes of temperature-time and pressure-speed to solve the key problem of accurately performing starting up and shutdown by a novel self-pressurization liquefied gas propulsion system.

Description

technical field [0001] The invention belongs to the field of aerospace propulsion theory and engineering research, and relates to a shutdown control method, in particular to a spacecraft propulsion system on-orbit autonomous shutdown control method. Background technique [0002] The development trend of the aerospace field requires that the future spacecraft must have a strong attitude, orbital maneuverability and high safety. The new self-pressurized liquefied gas propulsion system belongs to the cold gas propulsion, which has the advantages of simplicity, reliability and high safety. Field attention, it will have broad application prospects on future spacecraft, especially micro-satellite platforms. The switch control method is the core technology of the new self-pressurized liquefied gas propulsion system applied to the actual aerospace engineering. Its main task is to accurately control the switch time of the propulsion system by inputting the predetermined control strat...

AI Technical Summary

Problems solved by technology

[0004] At present, there is no domestic spacecraft that adopts a new type of liquefied gas propulsion system to successfully implement orbit control. Abroad, only the German Inspector satellite uses a similar propulsion system, but there is no report on its shutdown method in published literature.

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