title: Fusion of electromyographic signals with proprioceptive sensor data in myoelectric pattern recognition for control of active transfemoral leg prostheses.
abstract: This paper presents a myoelectric knee joint angle estimation algorithm for control of active transfemoral prostheses, based on feature extraction and pattern classification. The feature extraction stage uses a combination of time domain and frequency domain methods (entropy of myoelectric signals and cepstral coefficients, respectively). Additionally, the methods are fused with data from proprioceptive sensors (gyroscopes), from which angular rate information is extracted using a Kalman filter. The algorithm uses a Levenberg-Marquardt neural network for estimating the intended knee joint angle. The proposed method is demonstrated in a normal volunteer, and the results are compared with pattern classification methods based solely on electromyographic data. The use of surface electromyographic signals and additional information related to proprioception improves the knee joint angle estimation precision and reduces estimation artifacts.
authors: Dept. of Electrical Engineering, University of Brasília, Brasília-DF, Brazil. lopez_delis@yahoo.com
authors: Alberto López
authors: AL
authors: Delis
authors: João Luiz Azevedo
authors: JL
authors: de Carvalho
authors: Geovany Araújo
authors: GA
authors: Borges
authors: Suélia
authors: S
authors: de Siqueira Rodrigues
authors: Icaro
authors: I
authors: dos Santos
authors: Adson Ferreira
authors: AF
authors: da Rocha
mesh_terms: D000465:Algorithms; D001186:Artificial Limbs; D004576:Electromyography / Q000379:methods*; D006801:Humans; D007719:Knee Joint / Q000033:anatomy & histology*; D010363:Pattern Recognition, Automated; D012815:Signal Processing, Computer-Assisted