Journal
IEEE TRANSACTIONS ON CYBERNETICS
Volume 51, Issue 4, Pages 1943-1953Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TCYB.2019.2906118
Keywords
Nonlinear systems; Time-varying systems; Artificial neural networks; Adaptive systems; Stochastic systems; Lyapunov methods; Adaptive control; neural networks (NNs); stochastic systems; time-varying constraints
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Funding
- National Natural Science Foundation of China [61622303, 61973147, 61751202, U1813203]
- Program for Liaoning Innovative Research Team in University [LT2016006]
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An adaptive neural network control scheme is developed for a class of stochastic nonlinear systems with time-varying full state constraints in this paper, using RBF NNs and tan-TVBLFs to approximate unknown terms and ensure constraints are never violated. The Lyapunov stability theory is used to prove the effectiveness of the control scheme in maintaining system stability and satisfying constraints.
In this paper, an adaptive neural network (NN) control scheme is developed for a class of stochastic nonlinear systems with time-varying full state constraints. In the controller design, RBF NNs are employed to approximate the unknown terms, and the backtracking technique is introduced to overcome the restriction of matching conditions. At the same time, tangent type time-varying barrier Lyapunov functions (tan-TVBLFs) are constructed to ensure the full state constraints are never violated, where tan-TVBLFs are beneficial to integrate constraint analysis into a common method. Furthermore, the Lyapunov stability theory is used to prove that all closed-loop signals are semiglobal uniformly ultimately bounded in probability and error signals remain in the compact set do not violate the time-varying constraints. A simulation example will be used to exhibit the effectiveness of the proposed control scheme.
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