Adaptive neural control for a class of strict-feedback nonlinear systems with state time delays.
This brief proposes a simple control approach for a class of uncertain nonlinear systems with unknown time delays in strict-feedback form. That is, the dynamic surface control technique, which can solve the "explosion of complexity" problem in the backstepping design procedure, is extended to nonlinear systems with unknown time delays. The unknown time-delay effects are removed by using appropriate Lyapunov-Krasovskii functionals, and the uncertain nonlinear terms generated by this procedure as well as model uncertainties are approximated by the function approximation technique using neural networks. In addition, the bounds of external disturbances are estimated by the adaptive technique. From the Lyapunov stability theorem, we prove that all signals in the closed-loop system are semiglobally uniformly bounded. Finally, we present simulation results to validate the effectiveness of the proposed approach.
Yoo
Sung Jin
SJ
Engineering Research Institute, Yonsei University, Seoul 120-749, Korea. niceguy1201@yonsei.ac.kr
Park
Jin Bae
JB
Choi
Yoon Ho
YH
D000222:Adaptation, Physiological / Q000502:physiology; D000465:Algorithms; D016477:Artifacts; D001185:Artificial Intelligence; D003198:Computer Simulation; D005246:Feedback / Q000502:physiology*; D016571:Neural Networks, Computer; D017711:Nonlinear Dynamics; D010363:Pattern Recognition, Automated; D012984:Software; D013997:Time Factors