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A real time surface electromyography signal driven prosthetic hand model using PID controlled DC motor

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An Erratum to this article was published on 23 January 2017

Abstract

Purpose

A surface electromyography (sEMG) driven proportional-integral-derivative (PID) control method is proposed to control the prosthetic hand model according to human intentions in real time.

Methods

The sEMG signals are acquired from the biceps and triceps brachii muscles of the human hand from 30 able bodied subjects. Two time domain features, integrated EMG (IEMG) and number of zero crossing (ZC) are extracted from the sEMG signals and these features are used for the estimation of human forearm kinematics. The estimation of human forearm kinematics is achieved by multi layered perceptron neural network (MLPNN) model based on nonlinear auto regressive with exogenous (NARX) inputs. The estimated human kinematics are utilized to control a direct current (DC) motor based prosthetic hand model using PID controller. The controller parameters are tuned manually to obtain the best possible results.

Results

It is observed that the IEMG and ZC varies with change in angular displacement and also with change in angular velocity. The performance of estimation and control is evaluated using two statistical parameters, root mean square error (RMSE) and regression value. The RMSE and regression value obtained during estimation of angular displacement is 5.89 and 0.97 and the corresponding value obtained for the estimation of angular velocity is 18.91 and 0.80. The RMSE and regression value obtained during control of angular displacement is 18.9096 and 0.9456 and the corresponding value obtained for the control of angular velocity is 27.91 and 0.68.

Conclusions

Experimental results confirm that the estimation using MLPNN and PID controlled prosthetic DC motor hand model performs well. The proposed method is simple in design and can be implemented in a human being with fewer costs.

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Authors and Affiliations

  1. Department of Electrical Engineering, National Institute of Technology, Calicut, India

    Retheep Raj, Rejith Ramakrishna & Karingannikalm Subramanian Sivanandan

Authors
  1. Retheep Raj
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  2. Rejith Ramakrishna
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  3. Karingannikalm Subramanian Sivanandan
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Corresponding author

Correspondence to Retheep Raj.

Additional information

An erratum to this article is available at http://dx.doi.org/10.1007/s13534-017-0011-x.

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Raj, R., Ramakrishna, R. & Sivanandan, K.S. A real time surface electromyography signal driven prosthetic hand model using PID controlled DC motor. Biomed. Eng. Lett. 6, 276–286 (2016). https://doi.org/10.1007/s13534-016-0240-4

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  • DOI: https://doi.org/10.1007/s13534-016-0240-4

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