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Roll angle measurement system based onitriaxial magneto-resistive sensor

 

ZHAO Xin-lu(赵鑫炉)1, ZHANG Xiao-ming(张晓明)1,2

 

1. Science and Technology on Electronic Test & Measurement Laboratory, North Un iversity of China

 

Abstract: Aiming at large error when inertial devices measure the roll angle un der high overload conditions, the article designs one kind of roll angle measure ment system based on magneto-resistive sensor which calculates the roll angle by micro controller STM32. Experiment results of a triaxial turntable show that us ing magneto-resistive sensor to measure roll angle is feasible and of high accur acy, and it can calculate the roll angle of the conventional projectile with the error in 1°.
Key words: magneto-resistive sensor; roll angle; error

 

CLD number: TP212.1 Document code: A

Article ID: 1674-8042(2013)03-0214-04 doi: 10.3969/j.issn.1674-8042.2013.03.0 03


References

[1] MA Guo-liang, LI Yan, GE Jing-fei. Principle analysis for roll attitude meas urement of spinning projectile using magnetic resistance sensor. Journa1 of Ball istics, 2012, 24(3): 33-36.
[2] SHI Guo-xing, YANG Shu-xing, SU Zhong. The study on attitude algorithm of ro lling projectile using geomagnetic informaticon. Journal of Projectiles Rockets Missiles and Guidance, 2011, 31(5): 32-36.
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Dynamic test methods for natural frequency of footbridge

WANG Cai-feng(王彩锋), GAO Shi-qiao(高世桥), JIN Lei(金 磊)

(School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 1 00081, China)

Abstract: Using environmental random vibration as the excitation, traditional a ccelerometer method, non-contact video method and non-contact laser method were employed to determine the natural frequency of Kunyu River footbridge. All the r esults of these three methods are close to 2.70 Hz, which are concordant with ea ch other and hence credible.

Key words:test method; non-contact; natural frequency; amplitude-frequency curv e

CLD number: TU997 Document code: A

Article ID: 1674-8042(2013)03-0218-05 doi: 10.3969/j.issn.1674-8042.2013.03.0 04

References

[1] GAO Shi-qiao, WANG Dong, JIN Lei. Influence of the human body on the charact eristics of a pedestrian bridge. In: Proceedings of the 18th ISSAT International Conference on Reliability and Quality in Design, Boston, Massachusetts, USA, 20 12.
[2] WANG Dong, GAO Shi-qiao, Kasperski M, et al. The dynamic characteristics of a couple system by pedestrian bridge and walking persons. Applied Mechanics and Materials, 2011, 71-78: 1499-1506.
[3] WANG Dong, GAO Shi-qiao, Kasperski M, et al. Simulation of the dynamic chara cteristics of the coupled system structure. Applied Mechanics and Materials, 201 1, 71-78: 1507-1510.
[4] WANG Dong, Kasperski M, GAO Shi-qiao. Change of the dynamic characteristics of a pedestrian bridge during a mass event. In: Proceedings of the 8th European Conference on Structural Dynamics, Leuven, Belgium, 2011.
[5] Zivanovic S. Probability-based estimation of vibration for pedestrian struct ures due to walking. Sheffield: The University of Sheffield, 2006.
[6] Pedersen L, Frier C. Sensitivity of footbridge vibrations to stochastic walk ing parameters. Journal of Sound and Vibration, 2010, 329: 2683-2701.
[7] Ingolfsson E T, Georgakis C T, Ricciardelli F, et al. Experimental identific ation of pedestrian-induced lateral forces on footbridges. Journal of Sound and Vibration, 2011, 330: 1265-1284.
[8] Qin J W, Law S S, Yang Q S, et al. Pedestrian-bridge dynamic interaction, in cluding human participation. Journal of Sound and Vibration, 2013, 332(4): 1107- 1124.
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[10] Fujino Y, Abe M, Shibuya H, et al. Forced and ambient vibration tests and v ibration monitoring of Hakucho suspension bridge. Transportation Research Record , 2000, 1696(2): 57-63.
[11] Zuo D L, Hua J Y, Landuyt D V. A model of pedestrian-induced bridge vibrati on based on full-scale measurement. Engineering Structures, 2012, 45: 117-126.

 

 

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