Research on Measurement Equipment for Moment of Inertia of Triple Torsion Bars Based on Torsion Pendulum

Abstract:

In order to increase the measuring range of the moment of inertia, a new measurement equipment with triple torsion bars based on torsion pendulum was designed. The equipment could switch the number of torsion bars from single to double or triple by inserting or extracting two movable pins and implement the function of three different measurement devices. The detailed deducing process for the measuring range of the moment of inertia at various measurement states was given. The results show that the measuring range of the measurement equipment has been significantly improved compared with other equipment using single torsion bar or double torsion bars and verify the effectiveness and practicability of the measurement equipment.

• Periodical: Applied Mechanics and Materials (Volume 851)
• Pages: 286-291
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.851.286
• Online since: August 2016
• Authors: De Min Wang*, Jian Zhang, Jian Liu, Tong Zhu, Fang Chao Shao, Lei Zhong
• Keywords: Moment of Inertia, Torsion Pendulum, Triple Torsion Bars

References

[1] H. Y. Li, Y. C. Zhang, B. H. Li, J. G. Li, Analysis and Design of the Moment of Inertia (MOI) Measuring Instrument with High Accuracy, Acta Metrologica Sinica, 25(3) (2004) 250-253.

[2] D. P. Lyons, Obtaining Optional Results with Filar Pendulums for Moment of Inertia Measurements, SAWE Paper, 2002-07 (323).

[3] H. R. Li, Measurement to Rigid Interior by the Falling Body Law, J. Charge Air Tools, (2) (2002) 24-28.

[4] B. Richard, A New High Accuracy Instrument for Measuring Moment of Inertia and Center of Gravity, SAWE Paper No. 1827, (1988).

[5] W. Hou, Research on Measurement Method for Moment of Inertia of Large-Scale Projectiles and Spacecrafts, J. North U. China (Natural Science Edition), (6) (2008).

[6] X. M. Zhang, L. G. Wang, The Measurement of Inertia Moment and Centroidal Deviation of Rocket Projectile with Compound Pendulum Method and Its Error Analysis, Acta Armamentarii, 4(4) (2008) 450-453.

[7] C. Song, J. J. Pan, The error in measuring the moment of inertia using three-string pendulum, Mech. Eng. 25(1) (2003) 59-61.

[8] Y. Che, Z. Li, L. H. Chen, A Measuring System of Inertia Moment of Missile and Its Error Analysis, Acta Armamentarii, 21(1) (2000) 42-44.

[9] W. Z. Wang, Z. H. Yu, Measurement of rotary inertia for small missile, J. Astronaut. Metrology, Measure. 22(4) (2002) 40-50.