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介绍了对称式三线摆与不对称式双线摆的工作原理及其微角和大角摆动周期的近似解法 ,同时说明了这两种摆的特点。利用这两种摆测量不规则转子或构件绕轴向和绕径向的惯性矩 ,既方便又准确。若采用长摆线 ,当摆角 φ0 <4 0°时 ,测量准确度优于 1%。
The working principle of the symmetrical three-wire pendulum and the asymmetrical two-wire pendulum are introduced, and the approximate solution of the micro-angle and the large-angle oscillating period is introduced. The characteristics of the two pendulums are also illustrated. It is convenient and accurate to measure the moment of inertia around the rotor and the rotor in both axial and radial directions by using these two pendulums. If the use of long cycloid, when the swing angle φ0 <4 0 °, the measurement accuracy of better than 1%.