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Progress based assist-as-needed control strategy for upper-limb rehabilitation

Ahmed Mounis, Shawgi Younis and Zainul Azlan, Norsinnira and Fatai, Sado (2018) Progress based assist-as-needed control strategy for upper-limb rehabilitation. In: 2017 IEEE Conference on Systems, Process and Control, ICSPC 2017, 15 - 16 December 2017, Hatten Square Melaka.

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Assist-as-Needed (AAN) strategy is one strategy of administering robotic assistance which has gained wide acceptance in recent time and has been clinically demonstrated to provoke motor recovery in neurologically impaired patients. The underlying principle in this scheme is to provide assistance to a patient to complete desired movement only when the patient is in need of that assistance, which invariably encourages patient’s active participation to provoke neuroplasticity. Effective deployment of this scheme in robot aided therapy still pose some challenges. One current difficulty is finding an appropriate method of estimating patients’ functional input, or movement ability, by means on which the robot judges whether to assist or to relax the assistance. Another concern is the repeatability or consistency of the estimated subject’s movement ability across a wide range of subjects with different disability level that can warrant a broad clinical adoption. Also, generally overlooked is the influence of subject’s recovery progress on the modality of the AAN assistance. In this study, we propose a progress-based assist-as-needed algorithm (pAAN) which rely on subject’s realtime functional ability record to drive robotic assistance. We define a novel functional ability index (FAI) on a baseline adaptive inertia related controller which decays the robotic torque assistance according to patients’ progress or active participation during therapy session. Simulation studies carried out for the task of lifting a can from table to the mouth, designed in accordance with the Wolf motor function test (WMFT), have demonstrated the feasibility of the pAAN strategy.

Item Type: Conference or Workshop Item (Invited Papers)
Additional Information: 4494/67302
Uncontrolled Keywords: Rehabilitation robotics, assist-as-needed strategy, adaptive control, wolf motor function test, functional ability.
Subjects: R Medicine > RC Internal medicine
T Technology > T Technology (General)
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Engineering
Kulliyyah of Engineering > Department of Mechatronics Engineering
Depositing User: Norsinnira Zainul Azlan
Date Deposited: 01 Nov 2018 12:18
Last Modified: 01 Nov 2018 12:18
URI: http://irep.iium.edu.my/id/eprint/67302

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