title: Backstepping control for periodically time-varying systems using high-order neural network and Fourier series expansion.
abstract: An adaptive backstepping tracking scheme is developed for a class of strict-feedback systems with unknown periodically time-varying parameters and unknown control gain functions. High-order neural network (HONN) and Fourier series expansion (FSE) are combined into a new function approximator to model each uncertain term in the system. The dynamic surface control (DSC) approach is used to solve the problem of 'explosion of complexity' in the backstepping design procedure. Nussbaum gain function (NGF) is employed to deal with the unknown control gain functions. The uniform boundedness of all closed-loop signals is guaranteed. The tracking error is proved to converge to a small residual set around the origin. Two simulation examples are provided to demonstrate the effectiveness of the control scheme designed in this paper.
authors.affiliation: Department of Applied Mathematics, Xidian University, Xi'an 710071, PR China. wshchen@126.com
authors.forename: Weisheng
authors.initials: W
authors.lastname: Chen
authors.forename: Wei
authors.initials: W
authors.lastname: Li
authors.forename: Qiguang
authors.initials: Q
authors.lastname: Miao
mesh_terms: D000465:Algorithms; D001185:Artificial Intelligence; D003198:Computer Simulation; D005246:Feedback; D005583:Fourier Analysis; D007221:Industry; D015233:Models, Statistical; D016571:Neural Networks, Computer; D017711:Nonlinear Dynamics