文献类型：期刊文献

英文题名：Observer-Based Adaptive Finite-Time Quantized Tracking Control of Nonstrict-Feedback Nonlinear Systems With Asymmetric Actuator Saturation

作者：Yu, Zhaoxu[1];Yang, Yekai[1];Li, Shugang[2];Sun, Jitao[3]

机构：[1]East China Univ Sci & Technol, Dept Automat, Minist Educ, Key Lab Adv Control & Optimizat Chem Proc, Shanghai 200237, Peoples R China;[2]Shanghai Univ, Dept Informat Management, Shanghai 200444, Peoples R China;[3]Univ Johannesburg, Inst Intelligent Syst, ZA-2006 Auckland Pk, South Africa

年份：2020

卷号：50

期号：11

起止页码：4545

外文期刊名：IEEE TRANSACTIONS ON SYSTEMS MAN CYBERNETICS-SYSTEMS

收录：;EI(收录号：20183105643693);WOS:【SCI-EXPANDED(收录号:WOS:000578826300053)】；

基金：This work was supported in part by the Chinese National Natural Science Foundation under Grant 61673296 and Grant 71271132, in part by the Shanghai Pujiang Program under Grant 15PJC049, and in part by the Fundamental Research Funds for the Central Universities under Grant 222201714055 and Grant 222201717006.

语种：英文

外文关键词：Quantization (signal); Nonlinear systems; Actuators; Adaptive systems; Output feedback; Adaptation models; Adaptive control; nonlinear system; observer; quantization; saturation

摘要：This paper investigates the output feedback adaptive finite-time quantized tracking problem for a class of uncertain nonstrict-feedback nonlinear systems with asymmetric actuator saturation, where signals including the measurable output and the control input are quantized by the sector-bounded quantizers. In order to overcome the technical difficulties arising from asymmetric actuator saturation and sector-bounded quantization errors, the combination of some novel techniques, the Gaussian error function-based smooth model, and fuzzy logic system approximation-based method are utilized. Moreover, an observer involving the quantized output signal and the saturated input signal is designed to reconstruct the unknown states. Then an adaptive output feedback tracking control strategy is developed for this class of systems, so that the system output follows satisfactorily a desired reference signal in finite time while all signals in the closed-loop systems are semi-global practical finite-time stable. Finally, two illustrative simulation examples are provided to validate the effectiveness and applicability of the proposed design.