摘要
利用角动量定理对实验采用的电磁驱动机械陀螺的内部摩擦力矩进行测量,分析了这一摩擦力矩对宏观旋转物体等效原理扭秤方案检验的影响,并就此提出了几项改善措施.实验结果表明:该摩擦力矩正比于陀螺的角速度,当陀螺旋转的角速度达到17 000 r/min时,陀螺内部摩擦力矩达到1×10-4N.m,这一大小对宏观旋转物体等效原理检验扭秤方案的预期精度给出了严格限制.
It is an open problem for the equivalence principle of extended rotating bodies. It is significant for equivalence principle test for extended rotating bodies with a torsion balance to measure the internal friction torque of a gyroscope. On the basis of the angular moment law, experimental result showed that the friction torque of the mechanical gyroscope was proportional to its rotating angular speed, and arrived at 1 × 10^-4 N · m as its angular speed was about 17 000 r/min. A restrict limitation for expected precision of equivalence principle test of extended rotating bodies with a torsion balance was set.
出处
《华中科技大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2006年第2期112-114,共3页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(10205005)
关键词
陀螺
摩擦力矩
扭秤
宏观旋转物体等效原理
gyroscope
friction torque
torsion balance
extended rotating bodies equivalence principle