Abstract
Bipropellant propulsion system (MON-1MMH) provides motivation for orbit transfer, attitude control and station keeping, is mainly applied for GEO satellite. Most bipropellant propulsion systems of satellite do not have the ability to control mixture ratio of oxidizer and fuel. The primary function of bypass control system, as an important part of bipropellant propulsion system, is to control helium pressure in the propellant tanks in order to control mixture ratio. This paper researches adjustment of mixture ratio for bipropellant propulsion system. Mathematical model for key components in bypass control system of bipropellant propulsion system and a reasonable model for system simulation combining the practical work of system is established. Through the dynamic simulation of Bang-Bang control with on-off solenoid valve for the adjustment of mixture ratio, structure parameters, working parameters and precision of feedback are all be considered for influence of system performance. The main factors affecting system performance are found out. The researches provide theoretical foundation for engineering implementation.
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