20 April 2010 Improvement of the accuracy of the aircraft center of gravity by employing optical fiber Bragg grating technology
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Safety flight of aircrafts requires that the aircraft center of gravity (CG) must fall within specified limits established by the manufacturer. However, the aircraft CG depends not only on the structure of planes, but also on the passengers and their luggage. The current method of estimating the weight of passengers and luggage by the average weight may result in a violation of this requirement. To reduce the discrepancy between the actual weight and estimated weight, we propose a method of improving the accuracy of calculating the CG of the plane by weighing the passengers and their personal luggage. This method is realized by a Weigh-In-Motion (WIM) system installed at boarding gates based on optical fiber Bragg grating (FBG) technology. One prototype of WIM is fabricated and tested at lab. The resolution of this system is 2 kg and can be further improved by advanced manufacture technology. With the accurate weight of passengers and luggage coming from the WIM system and the locations of passengers and luggage obtained from boarding cards, the aircraft CG can be calculated correctly. This method can be applied into other fields, such as escalators, boarding gates for ferries.
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Hongtao Zhang, Hongtao Zhang, Pengfei Wang, Pengfei Wang, LingLing Fan, LingLing Fan, Liang Guan, Liang Guan, Qiming Zhao, Qiming Zhao, Hong-Liang Cui, Hong-Liang Cui, "Improvement of the accuracy of the aircraft center of gravity by employing optical fiber Bragg grating technology", Proc. SPIE 7677, Fiber Optic Sensors and Applications VII, 767715 (20 April 2010); doi: 10.1117/12.851826; https://doi.org/10.1117/12.851826

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