DocumentCode :
2849838
Title :
Active disturbance rejection control for human postural sway
Author :
Kotina, R. ; Qing Zheng ; van den Bogert, A.J. ; Zhiqiang Gao
Author_Institution :
Honeywell Int. Inc., Phoenix, AZ, USA
fYear :
2011
fDate :
June 29 2011-July 1 2011
Firstpage :
4081
Lastpage :
4086
Abstract :
A fundamental and open issue pertaining to human postural sway is how to deal with the uncertain, nonlinear and time-varying nature of human motor dynamics. To address the inherent limitations of the current methods, such as PID and model-based designs, a novel active disturbance rejection concept is introduced. In this new framework, the uncertainties, nonlinearities and changes in the dynamics of the plant are treated as disturbance to be rejected. A unique disturbance rejection observer is employed to estimate it and compensate for it in real time. It is shown that the resulting new controller yields excellent performance even with significant uncertainties in the plant dynamics. Furthermore, such design strategy requires very little prior knowledge of the plant.
Keywords :
biocontrol; control system synthesis; gait analysis; nonlinear control systems; observers; position control; time-varying systems; uncertain systems; active disturbance rejection control; disturbance rejection observer; human motor dynamics; human postural sway; nonlinear system; plant dynamics; time-varying system; uncertain system; Feedback control; Humans; Joints; Mathematical model; Muscles; Observers; Uncertainty; active disturbance rejection control; extended state observer; functional electrical stimulation; postural control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
American Control Conference (ACC), 2011
Conference_Location :
San Francisco, CA
ISSN :
0743-1619
Print_ISBN :
978-1-4577-0080-4
Type :
conf
DOI :
10.1109/ACC.2011.5990973
Filename :
5990973
Link To Document :
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