Conference proceeding
Dynamic validation of a strain-based 3D shape sensing system
Proceedings of SPIE - The International Society for Optical Engineering, Vol.11379, pp.1137905-1137905-13
04/23/2020
DOI: 10.1117/12.2558233
Abstract
Shape sensing of gives insight into the structural health and operating conditions of flexible engineered structures in challenging environments. This work describes the dynamic validation of a low-cost and robust tool for near-real-time shape sensing using strain measurements along a cantilevered rectangular spar paired with a kinematic reconstruction algorithm. The spar was loaded with several mass distributions and subjected to an impulsive hammer strike. Measurements from the shape sensor was compared to measurements from several conventional accelerometers in the time domain and frequency domain. Accelerations inferred from the shape sensing spar exhibited an average RMS error of 2.23% when compared to accelerations from accelerometers. Measured natural frequencies and damping ratios exhibited errors of .13% and 1.83% respectively. Operating deflection shapes were in good qualitative agreement with calculated and simulated mode shapes. These results show the shape sensor to be a useful tool for dynamic measurements of compliant structures.
Details
- Title: Subtitle
- Dynamic validation of a strain-based 3D shape sensing system
- Creators
- Isaac M Di Napoli - University of IowaCasey M Harwood - University of Iowa
- Contributors
- Haiying Huang (Editor) - The University of Texas at ArlingtonHoon Sohn (Editor) - KAIST (Korea, Republic of)Daniele Zonta (Editor) - University of Strathclyde
- Resource Type
- Conference proceeding
- Publication Details
- Proceedings of SPIE - The International Society for Optical Engineering, Vol.11379, pp.1137905-1137905-13
- Publisher
- SPIE
- DOI
- 10.1117/12.2558233
- ISSN
- 0277-786X
- eISSN
- 1996-756X
- Language
- English
- Date published
- 04/23/2020
- Academic Unit
- Mechanical Engineering
- Record Identifier
- 9984196509902771
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