静电陀螺仪空心球转子变形分析

提出了基于有限元方法对静电陀螺仪空心球转子离心变形、温度变形、压力变形和综合变形的分析方案,并给出了减少变形的措施。分析结果表明:转子的变形主要是由温度引起的,压力和离心产生的变形相对比较小;离心变形对转子的球形度影响较大,但变形值要比温度引起的变形值约小2个数量级;温度变化对转子的半径变化产生较大影响,但主要影响转子与电极之间的间隙,对转子的球形度几乎没有影响;同样,压力变形对球形度影响较小,对半径影响也较小。因此,在结构设计时将转子半径变化考虑进去,并加以补偿,则对转子半径的影响就可以忽略。可以通过在四个标准大气压和五个标准大气压下将空心球转子研磨成球形,来消除离心变形对转子球形度的影响。结果还表明该方案对空心转子静电陀螺仪转子的研制具有重要的应用价值。

Analysis on hollow rotor deformation of electrostatic suspended gyroscope

A scheme to analyze the centrifugal deformation,temperature deformation,pressure distortion and synthesis distortion of the hollow rotor of ESG(the Electrostatic Suspended Gyroscope),and the measures to reduce the deformation were presented.The analysis results show that the rotor deformation is mainly caused by the temperature,the centrifugal deformation can produce a great impact on the spherical roundness of the rotor,but the deformation value is litter than that of the temperature deformation by second order of magnitude.The temperature takes great effect on the rotor radius by mainly affecting the clearance between the rotor and the electrode,the pressure distortion takes little effect on the spherical roundness and the rotor radius in the same way.Therefore,the rotor radius should be taken account,and compensated for designing a structure.The effect of the centrifugal deformation on the spherical roundness of the rotor could be reduced by grinding the hollow rotor into sphere lapped on four or five atmospheres.The results also show that this scheme is applicable for developing the hollow rotor of ESG.