東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

FindBook

Google Book

Amazon

博客來

Dynamic Modelling for the Design of Head-Neck Load Carriage Systems.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Dynamic Modelling for the Design of Head-Neck Load Carriage Systems./
作者:	Hetzler, Markus Andreas.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2021,
面頁冊數:	164 p.
附註:	Source: Masters Abstracts International, Volume: 83-02.
Contained By:	Masters Abstracts International83-02.
標題:	Aircraft accidents & safety. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28558877
ISBN:	9798522947828

Dynamic Modelling for the Design of Head-Neck Load Carriage Systems.
Hetzler, Markus Andreas.

Dynamic Modelling for the Design of Head-Neck Load Carriage Systems. - Ann Arbor : ProQuest Dissertations & Theses, 2021 - 164 p.

Source: Masters Abstracts International, Volume: 83-02.

Thesis (M.Sc.)--Queen's University (Canada), 2021.

This item must not be sold to any third party vendors.

Head load-carriage systems have broad application, allowing people to carry awkward or heavy loads, but can cause chronic pain when the neck is loaded improperly. Studies have identified military helicopter crew neck pain as a significant issue, with reported incidence of neck pain amongst Canadian flight crews in excess 70% [1][2][3], leading to high costs and operational downtime. Although the problem is multi-factorial, one area of interest is due to the adoption of helmet mounted night-vision goggles, which create large, unbalanced moments on the neck. While no single point solution has been identified, research has ranked external neck support devices fourth out of twelve recommended measures, following education, exercise, and workload distribution, that could have the greatest benefit to reducing neck pain, with an estimated efficacy of 66.1%[4].The objective of this study was to develop a simplified multibody dynamics (MBD) model to evaluate the C7-T1 moments in flexion-extension (down-and-up motion of the head) and in yaw (side-to-side rotation of the head) for a series of visual scanning tasks. Three base head load conditions were considered: the head-only, a head and helmet, a head and helmet with night-vision googles and battery pack.The model was used to evaluate three potential countermeasures in effort to return the neck moments to the baseline condition (head and helmet). The countermeasures evaluated were: a counterweight, a single line-of-action spring system, and a dual line-of-action spring system. The model demonstrated that the counterweight solution provides increased moments in virtually all situations except for the neutral posture, which is unlikely to reduce long-term injury risk. In contrast, both spring systems have potential to return the flexion moments to the baseline, however these suffer from a restorative moment when the head is rotated in yaw.The potential for improvement however is significant, and the results show further development of implementable solutions is merited. Further work should also be performed to upgrade the MBD model to include a broader set of environmental and task-based loading conditions, and to improve the treatment of variability such as differences in base geometry and how the head-to-helmet connection is simulated.

ISBN: 9798522947828Subjects--Topical Terms:

3559214
Aircraft accidents & safety.

Dynamic Modelling for the Design of Head-Neck Load Carriage Systems.
LDR:03334nmm a2200325 4500 001 2347920
005 20220829094951.5
008 241004s2021 ||||||||||||||||| ||eng d
020 $a 9798522947828
035 $a (MiAaPQ)AAI28558877
035 $a (MiAaPQ)QueensUCan_197428818
035 $a AAI28558877
040 $a MiAaPQ $c MiAaPQ
100 1 $a Hetzler, Markus Andreas. $3 3687229
245 1 0 $a Dynamic Modelling for the Design of Head-Neck Load Carriage Systems.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2021
300 $a 164 p.
500 $a Source: Masters Abstracts International, Volume: 83-02.
500 $a Advisor: Bryant, Tim.
502 $a Thesis (M.Sc.)--Queen's University (Canada), 2021.
506 $a This item must not be sold to any third party vendors.
520 $a Head load-carriage systems have broad application, allowing people to carry awkward or heavy loads, but can cause chronic pain when the neck is loaded improperly. Studies have identified military helicopter crew neck pain as a significant issue, with reported incidence of neck pain amongst Canadian flight crews in excess 70% [1][2][3], leading to high costs and operational downtime. Although the problem is multi-factorial, one area of interest is due to the adoption of helmet mounted night-vision goggles, which create large, unbalanced moments on the neck. While no single point solution has been identified, research has ranked external neck support devices fourth out of twelve recommended measures, following education, exercise, and workload distribution, that could have the greatest benefit to reducing neck pain, with an estimated efficacy of 66.1%[4].The objective of this study was to develop a simplified multibody dynamics (MBD) model to evaluate the C7-T1 moments in flexion-extension (down-and-up motion of the head) and in yaw (side-to-side rotation of the head) for a series of visual scanning tasks. Three base head load conditions were considered: the head-only, a head and helmet, a head and helmet with night-vision googles and battery pack.The model was used to evaluate three potential countermeasures in effort to return the neck moments to the baseline condition (head and helmet). The countermeasures evaluated were: a counterweight, a single line-of-action spring system, and a dual line-of-action spring system. The model demonstrated that the counterweight solution provides increased moments in virtually all situations except for the neutral posture, which is unlikely to reduce long-term injury risk. In contrast, both spring systems have potential to return the flexion moments to the baseline, however these suffer from a restorative moment when the head is rotated in yaw.The potential for improvement however is significant, and the results show further development of implementable solutions is merited. Further work should also be performed to upgrade the MBD model to include a broader set of environmental and task-based loading conditions, and to improve the treatment of variability such as differences in base geometry and how the head-to-helmet connection is simulated.
590 $a School code: 0283.
650 4 $a Aircraft accidents & safety. $3 3559214
650 4 $a Software. $2 gtt. $3 619355
650 4 $a Computer aided engineering--CAE. $3 3683442
650 4 $a Aerospace engineering. $3 1002622
650 4 $a Engineering. $3 586835
690 $a 0538
690 $a 0537
690 $a 0338
710 2 $a Queen's University (Canada). $3 1017786
773 0 $t Masters Abstracts International $g 83-02.
790 $a 0283
791 $a M.Sc.
792 $a 2021
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28558877