Joint angle estimation with accelerometers for dynamic postural analysis

JOURNAL OF BIOMECHANICS

卷:48

Article

Ma, Jianting¹  Kharbouty, Haissam¹  Benali, Abderraouf²  Benamar, Faiz¹  Bouzit, Mourad¹ 

[1] Univ Paris 06, Sorbonne Univ, CNRS, UMR 7222,ISIR, F-75005 Paris, France

[2] Univ Orleans, INSA Ctr Val de Loire, PRISME, EA 4229, F-18020 Bourges, France

关键词: Joint estimation;    Postural disturbance;    Inverted pendulum;    Tri-axial accelerometer;    Omnidirectional mobile platform;   

DOI  :  10.1016/j.jbiomech.2015.08.008

来源: Elsevier

【 摘 要 】

This paper presents a new accelerometer based method for estimating the posture of a subject standing on a dynamic perturbation platform. The induced perturbation is used to study the control mechanisms as well as the balance requirements that regulate the upright standing. These perturbations are translated into different intensity levels of speed and acceleration along longitudinal and lateral directions of motion. In our method, the human posture is modeled by a tridimensional, three-segment inverted pendulum which simultaneously takes into account both the anterior-posterior and medio-lateral strategies of hip and ankle. Four tri-axial accelerometers are used her, one accelerometer is placed on the platform, and the other three are attached to a human subject. Based on the results, the joint angle estimated compare closely to measurements from magnetic encoders placed on an articulated arm joint. The results were also comparable to those found when using a high-end optical motion capture system coupled with advanced biomechanical simulation software. This paper presents the comparisons of our accelerometer-based method with encoder and optical marker based method of the estimated joint angles under different dynamics perturbations. (C) 2015 Elsevier Ltd. All rights reserved.

【 授权许可】

Free