A method and system for adjusting and compensating the on-orbit performance of a spacecraft propulsion system

Abstract

The present invention provides an on-orbit performance adjustment and compensation method and system of a spacecraft propulsion system, the method comprising: step 1: setting multiple pressure sensors and multiple parallel orbit control self-locking valves on the orbit control pipeline; step 2: Through the stand-alone liquid flow debugging of the rail-controlled self-locking valve, the flow resistance value of a single rail-controlled self-locking valve is obtained respectively; Step 3: Make the ground adjustment value of the inlet pressure of the oxidant path and the fuel path equal when the rail-controlled engine is working; Step 4: The rail-controlled self-locking valve When debugging the liquid flow of a single-machine control engine, ensure that the accuracy of the engine mixing ratio meets the requirements; Step 5: During the orbital flight of the propulsion system, obtain the actual measured value of the engine inlet pressure during the ignition of the orbit-controlled engine; Step 6: Calculate the inlet pressure of the oxidizer circuit and Compared with the actual measured value of the inlet pressure of the fuel line, the on-orbit performance adjustment and compensation strategy is implemented as needed. The invention can actively adjust and compensate the mixing ratio of the orbit control engine within a certain range, and improve the utilization rate of the propellant.

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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