| Author | Search for: Chang, J.1; Search for: Fereidooni, A.1; Search for: Wickramasinghe, V.1; Search for: Chen, Y.1 |
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| Affiliation | - National Research Council Canada. Aerospace
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| Format | Text, Article |
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| Conference | 30th International Conference on Adaptive Structures and Technologies, ICAST 2019, October 7-11, 2019, Montreal, Canada |
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| Abstract | This paper presents the development and evaluation of a proof-of-concept multi-axis and actively controlled helicopter seat mount system for aircrew whole-body vibration reduction. The multi-axis seat mount is designed to be installed between the helicopter seat floor and the seat supporting structure to minimize the impact on crashworthiness requirements of the helicopter seat. The design involves multiple miniature force actuators to counteract the vibrations of the seat frame and occupant transmitted from the helicopter floor in three orthogonal directions. The actuators are controlled by an adaptive feedforward filtered-x least mean square algorithm to cancel the helicopter floor vibration input. The prototype active seat mount design was tested in various configurations with a shaker table providing representative Bell-412 helicopter vibration inputs. Test results demonstrated that the vibrations of the seat frame and mannequin occupant body were suppressed simultaneously, and the major N/rev harmonic peaks of the occupant's whole-body vibration were reduced by 95%. This demonstrated that the multi-axis active seat mount design can mitigate the whole-body vibration exposure of the helicopter aircrew to improve their ride quality and reduce adverse health effect. |
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| Publication date | 2019-10-07 |
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| Publisher | International Conference on Adaptive Structures and Technologies |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 122a85f0-db13-4ae1-9e45-41612745e358 |
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| Record created | 2021-02-23 |
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| Record modified | 2021-02-23 |
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