Design And Research Of Small Hole Throttle Single Axis Air Floating Platform Test System

With the continuous development of aerospace technology,the competition of science and technology in outer space of various countries is intensifying.In order to improve the success rate of launch,complete the launch mission,save the cost of scientific research input,and reduce the risk,the full physical simulation test system for spacecraft attitude control becomes a must.An indispensable test link.The ground full physical simulation test system can create a low-gravity environment in space,and reduce the friction force through air-floating bearings,thus simulating the attitude control of the spacecraft in a low-gravity environment.In this paper,the small-hole throttling single-axis air-floating table test system is the research object,and the related research on mechanical structure design,theoretical analysis and test verification is carried out.This paper first analyzes the key indicators such as bearing capacity,interference torque and angle measurement accuracy,and points out the key requirements and difficulties in the development of single-axis air-floating platform.The mechanical structure of the single-axis air-floating platform is designed according to these key indicators.The air-floating bearing is the key component in the structure.The theoretical analysis of the air-floating bearing and the small-hole throttling method is carried out,and the bearing capacity of the bearing is also carried out.The bearing’s disturbance torque is analyzed by finite element flow field,and the gravity eccentric moment of the air bearing and the bearing base.The main table was theoretically analyzed and calculated.Through the analysis of key indicators,this paper focuses on the bearing capacity of the single-axis air-floating platform and the detection and improvement methods for the interference torque,so as to ensure the development requirements of the single-axisair-floating platform.At the same time,for the design of subsystems in the system and the selection of hardware,including the design of the angle measuring device,the overall design of the air-conditioning system,the design of the cold air thruster group,and the design of the on-stage process system,this paper also has a detailed design and subsystem.The design and selection of key components is also an important factor affecting the overall test results of the single-shaft air-floating platform.Combined with theoretical research and field installation experience,a series of experimental verifications were carried out on the single-axis air-floating platform,and experiments were carried out on various aspects such as bearing capacity and interference torque of key indicators.