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Fixed time event-triggered control for high-order nonlinear uncertain systems with time-varying full state constraints
Authors:Panpan Yang  Xuyang Wang  Xingwen Chen  Sen Du
Affiliation:1. School of Electronics and Control Engineering, Chang'an University, Xi'an, China;2. Research Institute of Intelligent Control and Systems, Harbin Institute of Technology, Harbin, China
Abstract:The fixed time event-triggered control for high-order nonlinear uncertain systems with time-varying full state constraints is investigated in this paper. First, the event-triggered control (ETC) mechanism is introduced to reduce the data transmission in the communication channel. In consideration of the physical constraints and engineering requirements, time-varying barrier Lyapunov function (BLF) is deployed to make all the system states confined in the given time-varying constraints. Then, the radial basis function neural networks (RBF NNs) are used to approximate the unknown nonlinear terms. Further, the fixed time stability strategy is deployed to make the system achieve semiglobal practical fixed time stability (SPFTS) and the convergence time is independent of the initial conditions. Finally, the proposed control scheme is verified by two simulation examples.
Keywords:event-triggered control  fixed-time stability  high-order nonlinear systems  time-varying full state constraints
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