用于质量特性参数测量的新型气浮扭摆台

doi:10.7527/S1000-6893.2013.0371

Abstract

Abstract:

The conventional torsion pendulum adopts a rolling bearing and torsion bar vibrating structure. It suffers from excessive length in the vertical direction, low measurement accuracy, poor load capacity, and poor anti-overturning moment, and it cannot meet the requirements of a comprehensive test platform for mass property parameters. The cross-shaped spring block structure is proposed to replace the torsion bar structure, and the size of the torsion pendulum is reduced in the vertical direction. Analysis and experiment prove that the new structure has the same effect as the torsion bar. As the rolling bearing is replaced by the gas bearings, the anti-overturning moment of the torsion pendulum is improved and measurement accuracy reaches up to 0.1%. The finite element method is adopted to simulate the re-corrected Reynolds equation under a cylindrical coordinate system,and then the influence of basic gas bearings structural parameters on load capacity and anti-overturning moment is studied. Finally, the optimized geometrical parameters of a given outer radius bearing are determined. Experimental results demonstrate that the improved test-bed improves the measurement accuracy and vibration stability. It is significant for mass property parameters measurement of spacecraft, such as satellites.

Key words: torsion pendulum, mass property parameter, gas bearings, finite element method, load capacity, anti-overturning moment

CLC Number:

WANG Qiuxiao, KONG Bo, WANG Fei, JIANG Huaifang. New Kind of Gas Bearing Torsion Pendulum Used for Mass Property Parameters Measurement[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2014, 35(3): 885-893.

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New Kind of Gas Bearing Torsion Pendulum Used for Mass Property Parameters Measurement

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