摘要
阐述了一般 (不对称 )三线摆的结构原理 ,并根据动量矩原理推导了其微角及大角摆动周期的近似表达式。同时还说明了一般三线摆的重要性质及优点。利用此摆可测量不规则小型物体绕某指定轴的转动惯量 ,而且不需要任何专用夹具。当 Lmin>2 0Rmax及 φ0 <2 0°角时 ,其测量准确度优于 5 %。
This paper describes the constitution and principle of a trilinear torsion pendulum in its general (namely unsymmetrical) form. Approximate expresions of the oscillating period were derived from the theory of moments of moneutum, in small and large angle oscillation for the general trilinear torsion pendulum. Some important oscillating properties and advantages for the general trilinear torsion pendulum were presented in the meantime. The moment of inertia of the irregular small-sized object can be measured reliable by using this pendulum without any special fixtures. When L min >20 R max and φ 0<40°,the accuracy of measurement with such means can'be better than 5%.
出处
《宇航计测技术》
CSCD
2002年第6期23-33,共11页
Journal of Astronautic Metrology and Measurement
关键词
三线摆
转动惯量
测量
摆动周期
Subject terms Trilinear torsion pendulumRotary inertiaMeasurementSwingPeriod
