RoboWalk Multiple-Sensor and Multipolar Data Fusion

Mahdizadeh, Omid; Akbari, Vahid; Ali, Sara; Moosavian, S. Ali A.

doi:10.1109/icrom48714.2019.9071834

Cited by 7 publications

(1 citation statement)

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“…For implementation purposes, selecting a case study that retains the critical feature of the vector of Floor Reaction Forces (FRF) passing through the center of mass during human movement is important. Regarding this key feature, RoboWalk, a bipedal lower limb assistive exoskeleton with minimal actuators, stands out as a suitable case study [46], [47].…”

Section: Robowalk Descriptionmentioning

confidence: 99%

Swift augmented human–robot dynamics modeling for rehabilitation planning analyses

Akbari,

Mahdizadeh,

Moosavian

et al. 2024

Multibody Syst Dyn

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With the widespread implementation of robotics exoskeletons in rehabilitation, modeling and dynamics analysis of such highly nonlinear coupled systems has become significantly important. In this paper, a swift numerical human-robot dynamics modeling has been developed to achieve accurate and realistic interpretation. This takes into consideration the separation and impact between multiple bodies for rehabilitation planning. To this end, first, a novel parallel algorithm combined with sequential interaction conditions is proposed based on the numerical Recursive Newton-Euler method. The approach begins by deriving separated numerical models for the complicated system: i.e. both the human and the robot. These models are then augmented, with a primary focus on reducing the error of the interaction conditions, including positions and forces. To evaluate the proposed model accuracy, the results are compared with a previously validated non-recursive analytical model. Additionally, the quality of the connection between the human and the robot is assessed to establish a suitable control objective and an effective interaction strategy for rehabilitation planning. The study employs a lower-limb walking assistive robot developed in the ARAS lab (RoboWalk) to validate the proposed method. The algorithm is empirically implemented on the RoboWalk test stand, ensuring the integrity of the proposed dynamics modeling. Finally, the effectiveness of the model-based controller is assessed by using the proposed method, providing valuable tools for the enhancement of overall performance of such a complex dynamics system.

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Section: Robowalk Descriptionmentioning

confidence: 99%