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Paper Abstract and Keywords
Presentation 2016-03-22 13:50
Influence of Knee-Joint Torque on Simulating Falling Accidents during Sit-to-Stand Movements
Toshikazu Matsui, Kunio Dobashi, Nobuaki Nakazawa (Gunma Univ.) MBE2015-110
Abstract (in Japanese) (See Japanese page) 
(in English) We have already formulated a dynamics-switching three-link and three-joint optimal control model that reproduces human sit-to-stand movements, and clarified that the convergence and non-convergence of the optimization calculation correspond to the success and failure in reproducing sit-to-stand movements, respectively, and that the influence of ankle-joint torque on falling accidents can be predicted. This research clarifies theoretically, by using the optimal control model, how the knee-joint torque at the seat-off time affects the subsequent rising movement, and it examines the possibility to predict the risk of falling caused by miscalculation of the knee-joint torque. Consequently, the following results are obtained: (1) the knee-joint torque at the seat-off time has its effective range necessary for the model to rise successfully from a chair; (2) a shortage of the ankle-joint torque makes the model pratfall, and an overage of the same torque makes the model fall forward to its knees. These results suggest that the optimal control model is effective in simulating falling movements as well.
Keyword (in Japanese) (See Japanese page) 
(in English) Rising movements / Chair / Risk of falling / Optimal control model / Seat off time / Knee joint torque / /  
Reference Info. IEICE Tech. Rep., vol. 115, no. 513, MBE2015-110, pp. 39-44, March 2016.
Paper # MBE2015-110 
Date of Issue 2016-03-15 (MBE) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF MBE2015-110

Conference Information
Committee MBE NC  
Conference Date 2016-03-22 - 2016-03-23 
Place (in Japanese) (See Japanese page) 
Place (in English) Tamagawa University 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To MBE 
Conference Code 2016-03-MBE-NC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Influence of Knee-Joint Torque on Simulating Falling Accidents during Sit-to-Stand Movements 
Sub Title (in English)  
Keyword(1) Rising movements  
Keyword(2) Chair  
Keyword(3) Risk of falling  
Keyword(4) Optimal control model  
Keyword(5) Seat off time  
Keyword(6) Knee joint torque  
1st Author's Name Toshikazu Matsui  
1st Author's Affiliation Gunma University (Gunma Univ.)
2nd Author's Name Kunio Dobashi  
2nd Author's Affiliation Gunma University (Gunma Univ.)
3rd Author's Name Nobuaki Nakazawa  
3rd Author's Affiliation Gunma University (Gunma Univ.)
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Date Time 2016-03-22 13:50:00 
Presentation Time 25 
Registration for MBE 
Paper # IEICE-MBE2015-110 
Volume (vol) IEICE-115 
Number (no) no.513 
Page pp.39-44 
#Pages IEICE-6 
Date of Issue IEICE-MBE-2016-03-15 

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