Title :
A new time-frequency approach to estimate single joint upper limb impedance
Author :
Piovesan, Davide ; DiZio, Paul ; Lackner, James R.
Author_Institution :
Ashton Graybiel Spatial Orientation Lab., Brandeis Univ., Waltham, MA, USA
Abstract :
This paper proposes a new technique to estimate single joint impedance during postural tasks. The method is based on a reassigned spectrogram and can track the frequency modulation of biomechanical system after perturbations. Compared to the existing techniques, this procedure successfully estimated rapidly time varying impedance parameters in a faster and equally accurate way. For this reason it can be an optimum tool to easily estimate limb impedance of stroke patients, before, during, and after robot therapy sessions, without interfering with the delivered treatment.
Keywords :
biomechanics; medical robotics; medical signal processing; patient rehabilitation; spectrometers; time-frequency analysis; biomechanical system; frequency modulation; perturbations; postural tasks; reassigned spectrogram; robot therapy; single joint upper limb impedance; stroke patients; time-frequency approach; Biomechanics; Biomedical Engineering; Electric Impedance; Forearm; Fourier Analysis; Humans; Linear Models; Movement; Stroke;
Conference_Titel :
Engineering in Medicine and Biology Society, 2009. EMBC 2009. Annual International Conference of the IEEE
Conference_Location :
Minneapolis, MN
Print_ISBN :
978-1-4244-3296-7
Electronic_ISBN :
1557-170X
DOI :
10.1109/IEMBS.2009.5333242
