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http://dx.doi.org/10.7736/KSPE.2012.29.5.545

A Study on the Vibration Characteristics of Camera Module for Aerial Reconnaissance Considering Vibration Isolator  

Lee, Sang-Eun (EO/IR R&D Lab., LIG NEX1 Co., Ltd.)
Lee, Tae-Won (Department of Mechanical Design Engineering, Kumoh National Institute of Technology)
Publication Information
Journal of the Korean Society for Precision Engineering / v.29, no.5, 2012 , pp. 545-553 More about this Journal
Abstract
A Gimbal structure system in observation reconnaissance aircraft is made up of camera module and stabilization drive device supporting camera module. During flight for image recording, the aircraft undergoes serious accelerations with wide frequencies due to several factors. Though base excitation of stabilization drive device induces vibration of camera module, it must get the stable and clean images. To achieve this aim, acceleration of camera module must be reduced. Hence, vibration isolators were installed to stabilization drive device. Considering isolators and bearings in the stabilization drive device, vibration characteristics of gimbal structure system were analyzed by finite element method. For three translational direction, acceleration transmissibility of camera module was calculated by harmonic responses analysis in the frequency range of 5 ~ 500 Hz. In addition to, sine-sweep experiment were performed to prove correctness of present analysis.
Keywords
Gimbal; Finite Element Method; Harmonic Responses Analysis; Acceleration Transmissibility; Vibration Isolator;
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  • Reference
1 Lee, S. E. and Lee, T. W., "Vibration Characteristic Analysis of Gimbal Structure System with Observation Reconnaissance Camera Module," Journal of the KSME A, Vol. 35, No. 4, pp. 409-415, 2001.
2 Ji, Y. K. and Lee, Y. S., "Random Vibration and Harmonic Response Analyses of Upper Guide Structure Assembly to Flow Induced Loads," Journal of the Computational Structural Engineering Institute of Korea, Vol. 15, No. 1, pp. 59-68, 2002.
3 Ahn, C. W., Hong, D. K. and Kim, D. Y., "A Study on the Optimal Position Determination of Middle Supporting Points to Maximize the first Natural Frequency of a Beam," Journal of KSNVE, Vol. 11, No. 1, pp. 89-95, 2001.
4 Rao, S. S., "Mechanical vibration 3-rd edition," Addison-Wesley Publishing Company, pp. 135-188, 1995.
5 ANSYS, "Users's Manual for Revision 12.0," ANSYS Inc., 2009.
6 Petrone, F., Lacagnina, M. and Scionti, M., "Dynamic Characterization of Elastomers and Identification with Rheological Model," Journal of Sound and Vibration, Vol. 271, No. 1-2, pp. 339-363, 2004.   DOI
7 Kim, K. W., Lim, J. R. and Ahn, T. K., "Stiffness Analysis of Compressed Rubber Components for Anti-vibration," Journal of the KSPE, Vol. 16, No. 6, pp. 141-147, 1999.
8 Kim, K. W., Lim, J. R. and Ahn, T. K., "Analysis and Experiment of the Dynamic Characterization of Rubber Material for Anti-vibration under Compression," Journal of the KSNVE, Vol. 8, No. 5, pp. 141-147, 1988.
9 Lord Corporation, "Low Profile Avionics Mounts(AM Series)," www.lord.com
10 Haberman, D., "Sine-sweep test simulation in ANSYS using the large-mass and direct-displacement methods," Collaborative Solutions, Inc., 2000.
11 Lord Corporation, "Theory of Vibration/Shock Isolators," www.lord.com
12 Kwon, T. K., Tani, J. and Lee, S. C., "PID Control of a Rotor System Vibration with Active Air Bearing," Proc. of KSPE Spring Conference, pp. 445-448, 2000.
13 Back, J. H., "Modeling on an Antenna Flexible Characteristics of a Prototype Gimbal with an Antenna and Major Design Factors to determine a System Bandwidth," Journal of the KSME A, Vol. 29, No. 5, pp. 743-753, 2005.
14 Cho, T. D. and Yang, S. M., "Robust Control of Hydraulically Operated Gimbal System," Journal of Mechanical Science and Technology, Vol. 21, No. 5, pp. 755-763, 2007.   DOI