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Biologically inspired algorithms applied to prosthetic control

Max Jair Ortiz-Catalan (Institutionen för signaler och system, Medicinska signaler och system) ; Rickard Brånemark ; Bo Håkansson (Institutionen för signaler och system, Medicinska signaler och system)
BioMed 2012 , February 15 – 17, 2012, Innsbruck, Austria track 764, p. 035. (2012)
[Konferensbidrag, refereegranskat]

Biologically inspired algorithms were used in this work to approach different components of pattern recognition applied to the control of robotic prosthetics. In order to contribute with a different training paradigm, Evolutionary (EA) and Particle Swarm Optimization (PSO) algorithms were used to train an Artificial Neural Network (ANN). Since the optimal input set of signal features is yet unknown, a Genetic Algorithm (GA) was used to approach this problem. The training length and rate of convergence were considered in the search of an optimal set of signal features, as well as for the optimal time window length. The ANN proved to be an accurate pattern recognition algorithm predicting 10 movements with over 95% accuracy. Moreover, new combinations of signal features with higher convergence rates than the commonly found in the literature were discovered by the GA. It was also found that the PSO had better performance that the EA as a training algorithm but worse than the well established Back-propagation. The latter considered accuracy, training length and convergence. Finally, the common practice of using 200 ms time window was found to be sufficient for producing acceptable accuracies while remaining short enough for a real-time control.

Nyckelord: Biomechatronics, Biomedical signal processing, Pattern recognition, Rehabilitation engineering, Bio-mechatronics, Biologically inspired algorithms, Convergence rates, Input set, Optimal sets, Optimal time, Particle swarm optimization algorithm, Pattern recognition algorithms, Prosthetic controls, Rate of convergence, Signal features, Time windows, Training algorithms, Training length, Approximation theory, Biomedical engineering, Neural networks, Particle swarm optimization (PSO), Prosthetics, Real time control, Robotics, Signal processing, Genetic algorithms



Denna post skapades 2012-09-05. Senast ändrad 2014-09-02.
CPL Pubid: 162938

 

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Institutioner (Chalmers)

Institutionen för signaler och system, Medicinska signaler och system (2005-2017)
Institutionen för kliniska vetenskaper, sektionen för anestesi, biomaterial och ortopedi, Avdelningen för ortopedi (GU)

Ämnesområden

Medicinteknik

Chalmers infrastruktur