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A Novel Robotic System Enabling Multiple Bilateral Upper Limb Rehabilitation Training via an Admittance Controller and Force Field
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  • Ran Jiao ,
  • Wenjie Liu ,
  • Ramy Rashad ,
  • Jianfeng Li ,
  • Mingjie Dong ,
  • Stefano Stramigioli
Ran Jiao
Beijing University of Technology, Beijing University of Technology

Corresponding Author:[email protected]

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Wenjie Liu
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Ramy Rashad
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Jianfeng Li
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Mingjie Dong
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Stefano Stramigioli
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Abstract

Patients with hemiplegia are usually restricted to performing general bilateral activities of daily life (gbADLs). Bilateral training has been verified to contribute to the rehabilitation of physical functions. Although robotic systems are gradually being employed in the field of rehabilitation, few studies have performed simulations with regards to gbADLs for training. Therefore, a novel end-effector bilateral rehabilitation robotic system (EBReCS) for the upper limb is developed in this article for the task rendering of gbADLs, in which the gbADL-corresponding workspace is obtained via modularly designed bilateral parallelogram mechanisms, and interaction rendering of multiple bimanual modes (uncoupled, trans-soft-coupled, trans-semi-coupled, and rotation-coupled) is achieved by implementing the admittance model, the inner force field between robotic end-effectors, and the outer force field distributed around. Experiments of the proposed four rehabilitation training modes were carried out on the healthy subject, with the results showing a feasible method of the EBReCS in the simulation of multiple bimanual coordinated rehabilitation training tasks. In the future, the constructed EBReCS is expected to be clinically tested and exploited for home rehabilitation as a coordinated training device.