20 November 2009 Modal analysis of low-level-light aiming sight-glass based on vibration testing conditions
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Proceedings Volume 7511, 2009 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems; 75110Y (2009); doi: 10.1117/12.837142
Event: International Conference on Optical Instrumentation and Technology, 2009, Shanghai, China
Abstract
Low-level-light (LLL) sight-glass measurement technologies based on multiple environmental testing conditions are always concerned by military equipments manufacturers. The article puts forward the concrete steps and method of vibration environmental testing measurement according to military optical equipments environments testing standards. Using vibration theory and mathematical modeling analysis, vibration modal of LLL aiming sight-glass based on vibration testing conditions is constructed and analyzed. In order to study dynamic characteristic of vibration system, coordinates of the physical model are converted to modal coordinates. By means of equating system modal, vibration modal is impacted by damping coefficient. Emulating the system under the damping coefficientξ from 0.1 to 1 and natural frequency n ωn is 89, the results indicate that damped systems is influenced by coordinates conversion of transfer function. The structure with less damping usually can be regarded as the proportional damping system otherwise can be considered as the general damping system.
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Youtang Gao, Si Tian, Jianliang Qiao, Jun Niu, Benkang Chang, "Modal analysis of low-level-light aiming sight-glass based on vibration testing conditions", Proc. SPIE 7511, 2009 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems, 75110Y (20 November 2009); doi: 10.1117/12.837142; http://dx.doi.org/10.1117/12.837142
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KEYWORDS
Modal analysis

Environmental sensing

Optics manufacturing

Image processing

Mathematical modeling

Spectrum analysis

Electronics engineering

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