On-orbit performance adjustment compensation method and system for spacecraft propulsion system

Abstract

The invention provides an on-orbit performance adjusting and compensating method and system for a spacecraft propulsion system. The method comprises the steps of 1, arranging a plurality of pressure sensors and a plurality of parallel on-orbit control self-locking valves on an on-orbit control pipeline; 2, obtaining the flow resistance value of each single rail control self-locking valve through single-machine liquid flow debugging of the rail control self-locking valve; 3, enabling the ground adjusting values of the inlet pressures of the oxidant path and the fuel path to be equal when the orbit control engine works; 4, ensuring that the mixing ratio precision of the engine meets the requirement during single-machine liquid flow debugging of the orbit control engine; 5, in the on-orbit flight process of the propulsion system, obtaining the measured value of the engine inlet pressure in the ignition working process of the orbit control engine; and 6, comparing the measured values of the oxidant path inlet pressure and the fuel path inlet pressure, and executing an on-orbit performance adjustment compensation strategy as required. Active adjustment compensation control within a certain range can be conducted on the mixing ratio of the orbit control engine, and the propellant utilization rate is increased.

Description

technical field [0001] The invention relates to the technical field of spacecraft dual-component propulsion systems, in particular to a method and system for adjusting and compensating the on-orbit performance of a spacecraft propulsion system. Background technique [0002] At present, spacecraft generally have higher and higher requirements on the propulsion system's mixing ratio accuracy and propellant utilization rate. Propulsion systems that require high mixing ratio accuracy generally use the ground orbit control pipeline flow resistance adjustment to ensure the orbit control engine mixing ratio. During the flight in orbit, if the actual flow resistance of the orbit control pipeline deviates from the ground debugging value, it will affect the mixing ratio of the orbit control engine, thereby affecting the propellant utilization rate. [0003] However, most propulsion systems do not have an on-orbit adjustment and compensation method for the engine mixture ratio performa...

AI Technical Summary

Problems solved by technology

[0004] In view of the above existing technologies, if the propulsion system using PGS needs to add a set of air supply system, the complexity of the system and the weight of the structure will increase accordingly

At present, spacecraft propulsion systems have higher and higher requirements for light weight structures, and generally do not configure the air supply system required by PGS, and there is no method of actively adjusting and compensating the engine mixing ratio on orbit.

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