Autonomous management method suitable for propulsion system in Mars detection

Abstract

The invention discloses an autonomous management method suitable for a propulsion system in Mars exploration. Faults of the propulsion system are divided into attitude control thruster leakage, rail control pipeline overpressure, pressure reducing valve static pressure overpressure, propulsion system underpressure and attitude control pipeline overpressure; the priority of the fault processing ofthe attitude control thruster leakage is the highest; the priorities of the fault processing of the other four faults are the same, and the fault processing is carried out in sequence according to a fault occurrence time sequence. According to the autonomous management method for the attitude control thruster leakage, a current thruster is switched out, so that other thrusters can be switched in.According to the autonomous management method for the rail control pipeline overpressure, a valve on a rail control pipeline is opened and closed. According to the autonomous management method for thepressure reducing valve static pressure overpressure, the pressure of a pressure reducing valve is reduced through gas path pressure balance. According to the autonomous management method of the propulsion system underpressure, a storage tank is pressurized; according to the autonomous management method for the attitude control pipeline overpressure, pressure relief is conducted on an attitude control pipeline. According to the method, the safety and reliability of the propulsion system in the whole Mars detection process are improved.

Description

technical field [0001] The invention relates to an autonomous management method suitable for a propulsion system in Mars exploration, in particular to a long-term self-management method suitable for a propulsion system in Mars exploration based on pressure monitoring, and belongs to the technical field of propulsion systems for Mars exploration. Background technique [0002] my country will carry out its first Mars exploration mission in 2020. The reliable operation of the propulsion system in the Mars exploration mission is the key to ensure the smooth progress of the exploration mission. During the long-term flight of the probe, there are many risks in the propulsion system: 1. After the orbit control of the high-thrust engine of the orbiter is completed, the high-flow self-locking valve is closed, making the downstream of the high-flow self-locking valve to the entrance of the high-thrust engine a closed pipeline . With the thermal intrusion after the engine is shut dow...

AI Technical Summary

Problems solved by technology

With the thermal intrusion after the engine is shut down and the temperature change of the sun orientation during the flight, the pressure of the propellant in the closed pipeline will rise, exceeding the range of the pressure sensor, causing potential danger to the propulsion subsystem

2. During the decompression operation of the propulsion system, the high-pressure self-locking valve and the small-flow self-locking valve of the gas path are closed, and the downstream outlet pressure of the pressure reducing valve has the risk of overpressure

3. Since the attitude control thruster consumes propellant during flight, the system pressure will gradually drop. When the system pressure drops to an underpressure state, the performance of the attitude control thruster will drop significantly.

Due to the satellite-ground time delay of the Mars rover, when the above problems occur in the propulsion system, quick decision-making and diagnosis are required, which cannot be quickly resolved through ground operations.

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