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Spacecrafts free of all but gravitational forces are important in precision navigation,gravity field measurement and basic scientific research.The Inner-formation Flying System,one kind of spacecrafts free of all but gravitational forces,is used for gravitational field measurement with high precision.Restraining the interfering factors on the inner-satellite is one of the keys to gravitational field measurement.Radiometer effect and residual gas damping are both interfering forces on the inner-satellite caused by gas molecules.By analyzing the mechanism of the two forces,a coupled model for radiometer effect and residual gas damping was established,which contained the coupling term and reflected the actual force of gas molecules on the inner-satellite.The simulation results showed the coupling property of radiometer effect and residual gas damping:The actual force of gas molecules is directly proportional to the average pressure in the cavity and the largest cross-sectional area of the inner-satellite,but is inversely proportional to the square root of the average temperature in the cavity.
Spacecrafts free of all but gravitational forces are important in precision navigation, gravity field measurement and basic scientific research. Inner-formation Flying System, one kind of spacecrafts free of all but gravitational forces, is used for gravitational field measurement with high precision. Testraining the interfering factors on the inner-satellite is one of the keys to gravitational field measurement. Radiometer effect and residual gas damping are both interfering forces on the inner-satellite caused by gas molecules. By analyzing the mechanism of the two forces, a coupled model for radiometer effect and residual gas damping was established, which contained the coupling term and reflected the actual force of gas molecules on the inner-satellite. The simulation results showed the coupling property of radiometer effect and residual gas damping: The actual force of gas molecules is directly proportional to the average pressure in the cavity and the largest cross-sectional area of the inner-satellite, but is inversely proportional to the square root of the average temperature in the cavity.