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Towards a Controlled Orthosis for Sit-To-Stand Support in Independently Living Elderly: Model Development

Jasper Juchem (UGent) , Mia Loccufier (UGent) and Amélie Chevalier (UGent)
(2023) IFAC-PapersOnLine. 56(2). p.6471-6476
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Abstract
Sit-to-stand (STS) movements are a daily challenge for independently living elderly. Literature shows a keen interest in using active orthoses to mitigate this problem. However, to design and test advanced control strategies for proof-of-concept orthoses, a validated model of the STS movement is missing. This work presents and elaborates on a model of the kinematics of the lower limb in combination with a human policy which represents the brain-muscle interaction. The model parameters are derived from both healthy and elderly patients. The applicability of the model is investigated by applying two popular control methods for active orthoses: gravity compensation and a control-based method. First, the results show model validation using measured in vivo joint torques from literature and, second, that both methods can be simulated using the developed STS model. This allows for optimizing and testing advanced control strategies in future work.
Keywords
orthosis, sit-to-stand, model development, elderly

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MLA
Juchem, Jasper, et al. “Towards a Controlled Orthosis for Sit-To-Stand Support in Independently Living Elderly: Model Development.” IFAC-PapersOnLine, vol. 56, no. 2, Elsevier BV, 2023, pp. 6471–76, doi:10.1016/j.ifacol.2023.10.861.
APA
Juchem, J., Loccufier, M., & Chevalier, A. (2023). Towards a Controlled Orthosis for Sit-To-Stand Support in Independently Living Elderly: Model Development. IFAC-PapersOnLine, 56(2), 6471–6476. https://doi.org/10.1016/j.ifacol.2023.10.861
Chicago author-date
Juchem, Jasper, Mia Loccufier, and Amélie Chevalier. 2023. “Towards a Controlled Orthosis for Sit-To-Stand Support in Independently Living Elderly: Model Development.” In IFAC-PapersOnLine, 56:6471–76. Elsevier BV. https://doi.org/10.1016/j.ifacol.2023.10.861.
Chicago author-date (all authors)
Juchem, Jasper, Mia Loccufier, and Amélie Chevalier. 2023. “Towards a Controlled Orthosis for Sit-To-Stand Support in Independently Living Elderly: Model Development.” In IFAC-PapersOnLine, 56:6471–6476. Elsevier BV. doi:10.1016/j.ifacol.2023.10.861.
Vancouver
1.
Juchem J, Loccufier M, Chevalier A. Towards a Controlled Orthosis for Sit-To-Stand Support in Independently Living Elderly: Model Development. In: IFAC-PapersOnLine. Elsevier BV; 2023. p. 6471–6.
IEEE
[1]
J. Juchem, M. Loccufier, and A. Chevalier, “Towards a Controlled Orthosis for Sit-To-Stand Support in Independently Living Elderly: Model Development,” in IFAC-PapersOnLine, Yokohama, Japan, 2023, vol. 56, no. 2, pp. 6471–6476.
@inproceedings{01HSTN63ND56DE8285C05ZZ2QP,
  abstract     = {{Sit-to-stand (STS) movements are a daily challenge for independently living elderly. Literature shows a keen interest in using active orthoses to mitigate this problem. However, to design and test advanced control strategies for proof-of-concept orthoses, a validated model of the STS movement is missing. This work presents and elaborates on a model of the kinematics of the lower limb in combination with a human policy which represents the brain-muscle interaction. The model parameters are derived from both healthy and elderly patients. The applicability of the model is investigated by applying two popular control methods for active orthoses: gravity compensation and a control-based method. First, the results show model validation using measured in vivo joint torques from literature and, second, that both methods can be simulated using the developed STS model. This allows for optimizing and testing advanced control strategies in future work.}},
  author       = {{Juchem, Jasper and Loccufier, Mia and Chevalier, Amélie}},
  booktitle    = {{IFAC-PapersOnLine}},
  issn         = {{2405-8963}},
  keywords     = {{orthosis,sit-to-stand,model development,elderly}},
  language     = {{eng}},
  location     = {{Yokohama, Japan}},
  number       = {{2}},
  pages        = {{6471--6476}},
  publisher    = {{Elsevier BV}},
  title        = {{Towards a Controlled Orthosis for Sit-To-Stand Support in Independently Living Elderly: Model Development}},
  url          = {{http://doi.org/10.1016/j.ifacol.2023.10.861}},
  volume       = {{56}},
  year         = {{2023}},
}

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