Satellite propellant management method based on multiplexing of attitude control thrusters

Abstract

The invention discloses a satellite propellant management method based on multiplexing of attitude control thrusters. The satellite propellant management method comprises the following steps: (S1) calculating control torque by virtue of attitude angular velocities, attitude angle estimated values and controller parameters; (S2) calculating a control pulse width which needs to be sent by the attitude control thrusters; (S3) calculating a jet command assigned to each thruster according to the control pulse width which needs to be sent by the attitude control thrusters and according to a thrusterselection situation for propellant management; (S4) completing valve opening and closing control of a solenoid valve, which needs to be opened, of the corresponding thruster according to the calculated jet command; (S5) repeating the steps to achieve satellite propellant management. The satellite propellant management method based on the multiplexing of the attitude control thrusters can use thesame set of thrusters and multiplexing control technology to accurately calculate the control torque required for the propellant management and attitude control so as to realize the liquid managementand attitude control of a propellant storage tank.

Description

technical field [0001] The invention relates to propellant management technology, in particular to a satellite propellant management method based on attitude control thruster reuse. Background technique [0002] After the satellite in geostationary orbit is separated from the carrier rocket, the satellite is in the transfer orbit segment in a micro-gravity environment. After multiple orbit changes are controlled, it enters the geostationary orbit. To restart the engine, propellant management must be addressed. At the same time, the satellite attitude and orbit control system needs to establish the apogee ignition attitude. In order to establish and maintain the attitude, the attitude control thruster needs to be used for attitude control. Usually, the actuators used in satellite attitude and orbit control systems include orbit control thrusters and attitude control thrusters. The orbit control thrusters are used for orbit control in the synchronous orbit section, and for th...

AI Technical Summary

Problems solved by technology

Usually, the actuators used in satellite attitude and orbit control systems include orbit control thrusters and attitude control thrusters. The orbit control thrusters are used for orbit control in the synchronous orbit section, and for the liquid sinking of the propellant tank in the transfer orbit section. , the attitude control thruster is used for normal attitude stability control, the disadvantage is that while the propellant is sinking to the bottom, the torque generated by the thruster jet will generate an additional external disturbance torque on the star, which requires the attitude control thruster to compensate. On the one hand, when the attitude control thruster is working, it will generate additional force on the propellant tank, which will affect the efficiency of propellant management

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