Research On Proportional Storage And Supply System For Propulsion System Of Space Gravitational Wave Detection

The detection of space gravitational wave is of great significance to the study of astrophysical information.At present,there are many plans for the detection of space gravitational wave in the world,which are expected to make a greater breakthrough in the field of gravitational wave detection.In order to ensure the measurement accuracy,the space gravitational wave detection plan requires the propulsion system thrust to have a large adjustment range,low noise level and high resolution between 0.1m Hz-10 Hz.As a propulsion system that may meet this requirement,the research of crossing field thruster's proportional storage and supply system needs to be carried out urgently.In this paper,the proportional storage and supply system of the micro propulsion system,which is suitable for the detection of space gravitational wave,is designed,and its working characteristics are simulated.This paper starts with the demonstration of the composition of the proportional storage and supply system,analyzes the structure and function of the proportional storage and supply system,and then through AMESim simulation platform,according to the working principle,structure and selection process of the components,establishes the simulation model and optimizes the parameters of the components.Based on the component model,the system simulation model is established and its working characteristics are simulated.The simulation includes open-loop control of flow,closed-loop control and simulation of system output response with and without restrictors,and analyzes the influence of control parameters,volume of valve lowpressure chamber,sensor position,ambient temperature,load flow resistance change and control frequency on system output accuracy.In addition,the feasibility of highpressure storage scheme and low-pressure storage scheme is analyzed by analyzing the working characteristics of mechanical pressure reducing valve,proportional valve and throttle.Finally,by combining the above simulation results with the thrust flow characteristics of the micro crossing field thruster(CFT)and the microwave enhanced CFT,the requirements of the flow when the thruster reaches the target thrust resolution,thrust noise level and thrust range are studied.The results show that the thrust characteristics of the microwave enhanced CFT are good,and it is expected to be used in the space gravitational wave detection task.