Title
Unknown time-varying input delay compensation for neuromuscular electrical stimulation
Abstract
In the present work, a control method is developed to yield lower limb tracking with neuromuscular electrical stimulation (NMES), despite an unknown time-varying input delay intrinsic to NMES, uncertain nonlinear dynamics, and additive bounded disturbances. A novel filtered tracking error signal is designed to obtain a delay-free control expression in the closed-loop error system. Furthermore, the filtered tracking error signal removes the requirement of exact knowledge of the input delay in the control design. The control development is based on an approach that uses Lyapunov-Krasovskii functionals in a Lyapunov-based stability analysis to prove ultimately bounded tracking error signals. Experimental results are provided to demonstrate the performance of the developed controller.
Year
DOI
Venue
2015
10.1109/CCA.2015.7320656
2015 IEEE Conference on Control Applications (CCA)
Keywords
Field
DocType
time-varying input delay compensation,neuromuscular electrical stimulation,NMES,uncertain nonlinear dynamics,additive bounded disturbance,filtered tracking error signal design,delay-free control,closed-loop error system,Lyapunov-Krasovskii functional,Lyapunov-based stability analysis
Lyapunov function,Control theory,Nonlinear system,Computer science,Control theory,Lower limb,Control engineering,Tracking error,Bounded function
Conference
ISSN
Citations 
PageRank 
1085-1992
0
0.34
References 
Authors
21
4
Name
Order
Citations
PageRank
Serhat Obuz1504.43
Ryan Downey2355.02
justin r klotz3996.44
Warren E. Dixon41757149.42