|Table of Contents|

Effect of friction resistance moment on measurement accuracy ofpolar moment of inertia of projectile by torsion pendulum method(PDF)

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
2017年05期
Page:
569-
Research Field:
Publishing date:

Info

Title:
Effect of friction resistance moment on measurement accuracy ofpolar moment of inertia of projectile by torsion pendulum method
Author(s):
Tang Hailiang12Wen Jingjing2Deng Dan2Wu Bin2
1.Xi’an Guide Technology Co LTD,Xi’an 710065,China; 2.School of Astronautics,Northwestern Polytechnical University,Xi’an 710072,China
Keywords:
projectiles polar moment of inertia torsion pendulum method friction resistance moment
PACS:
TJ760.6
DOI:
10.14177/j.cnki.32-1397n.2017.41.05.005
Abstract:
In view of the effect of the friction resistance moment on the measurement accuracy of polar moment of inertia of projectiles by the torsion pendulum method,the measurement method is modified.The calculation method and the approximate constant processing of the friction resistance moment are given in details,then the motion differential equation is deduced in consideration of the effect of the friction resistance moment.Then the influences of the friction resistance moment on the pendulum period,the pendulum count and the static equilibrium position are analyzed.By presenting the numerical solution of the motion differential equation,the qualitative analysis of trend of the measurement period is conducted when the photoelectric sensor is located at different positions between the two static equilibrium positions,and the installation location of the photoelectric sensor is optimized.The calculation result of example shows that the effect of the friction resistance moment on the measurement accuracy of the polar moment of inertia of projectiles by the torsion pendulum method can not be ignored,and its measurement error decreases by one order magnitude when using the method in this paper.

References:

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Last Update: 2017-09-30