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Advances in Robotics Research   Volume 2, Number 3, September 2018, pages 237-245
DOI: http://dx.doi.org/10.12989/arr.2018.2.3.237
 
The control of an upper extremity exoskeleton for stroke rehabilitation: An active force control scheme approach
Anwar P.P. Abdul Majeed, Zahari Taha, Muhammad Amirul Abdullah, Kamil Zakwan Mohd Azmi and Muhammad Aizzat Zakaria

 
Abstract     [Full Text]
    This study evaluates the efficacy of a class robust control scheme namely active force control in performing a joint based trajectory tracking of an upper limb exoskeleton in rehabilitating the elbow joint. The plant of the exoskeleton system is obtained via system identification method whilst the PD gains were tuned heuristically. The estimated inertial parameter that enables the AFC disturbance rejection effect is attained by means of a non-nature based metaheuristic optimisation technique known as simulated Kalman filter (SKF). It was demonstrated from the present investigation that the proposed PDAFC scheme outperformed the classical PD algorithm in tracking the prescribed trajectory both in the presence and without the presence of disturbance attributed by the mannequin limb weights (1 kg and 1.5 kg) that mimics the weight of actual human limb weight. Therefore, it is apparent from the results obtained from the present study that the proposed control scheme, i.e., PDAFC is suitable for the application of exoskeleton for stroke rehabilitation.
 
Key Words
    rehabilitation; upper limb exosckeleton; active force control; simulated kalman filter
 
Address
Anwar P.P. Abdul Majeed, Zahari Taha, Muhammad Amirul Abdullah, Kamil Zakwan Mohd Azmi and Muhammad Aizzat Zakaria: Innovative Manufacturing, Mechatronics and Sports Laboratory, Faculty of Manufacturing Engineering, Universiti Malaysia Pahang. 26600 Pekan, Pahang, Malaysia
 

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