Adaptive fuzzy command filtered control for uncertain fractional order nonlinear systems with full state constraints by Ruixia Liu, Yang Han, Lei Xing, Liyang Sun

“…Abstract This paper investigates the tracking control problem for fractional-order (FO) nonlinear systems with model uncertainties and external disturbances under full-state constraints. …”
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Erratum to “Learning to Boost the Performance of Stable Nonlinear Systems” by Luca Furieri, Clara Lucia Galimberti, Giancarlo Ferrari-Trecate

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Higher-Order Iterative Learning Control with Optimal Control Gains Based on Evolutionary Algorithm for Nonlinear System by Yun-Shan Wei, Xiaofen Yang, Wenli Shang, Ying-Yu Chen

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Direct Adaptive Tracking Control for a Class of Pure-Feedback Stochastic Nonlinear Systems Based on Fuzzy-Approximation by Huanqing Wang, Xiaoping Liu, Qi Zhou, Hamid Reza Karimi

“…The problem of fuzzy-based direct adaptive tracking control is considered for a class of pure-feedback stochastic nonlinear systems. During the controller design, fuzzy logic systems are used to approximate the packaged unknown nonlinearities, and then a novel direct adaptive controller is constructed via backstepping technique. …”
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Enhanced Bearing Fault Detection Using Step-Varying Vibrational Resonance Based on Duffing Oscillator Nonlinear System by Yongbin Liu, Zhijia Dai, Siliang Lu, Fang Liu, Jiwen Zhao, Jiale Shen

“…Given this, a step-varying vibrational resonance (SVVR) method based on Duffing oscillator nonlinear system is proposed to enhance the weak status feature of bearing by tuning different parameters. …”
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Global convergence in a modified RMIL-type conjugate gradient algorithm for nonlinear systems of equations and signal recovery by Yan Xia, Songhua Wang

Subjects: “…nonlinear systems of equations…”
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Nonlinear system optimization of cutting tools with dynamic vibration absorbers in deep hole boring: A stability analysis by Lie Li, Yuchen Ren, Zikai Shen, Junna Lu, Linhai Tong

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Adaptive Differentiator-Based Predefined-Time Control for Nonlinear Systems Subject to Pure-Feedback Form and Unknown Disturbance by Man Yang, Qiang Zhang, Ke Xu, Ming Chen

“…In this article, by utilizing the predefined-time stability theory, the predefined-time output tracking control problem for perturbed uncertain nonlinear systems with pure-feedback structure is addressed. …”
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Output-Feedback and Inverse Optimal Control of a Class of Stochastic Nonlinear Systems with More General Growth Conditions by Liu Jianwei, Guo Longchuan, Zuo Xin, Liang Huaqing

“…This paper investigates the problem of output-feedback stabilization for a class of stochastic nonlinear systems in which the nonlinear terms depend on unmeasurable states besides measurable output. …”
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A Retrospection of Chaotic Phenomena in Electrical Systems by Umesh Kumar

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Input-to-State Stabilization of a Class of Uncertain Nonlinear Systems via Observer-Based Event-Triggered Impulsive Control by Xiangru Xing, Jin-E Zhang

“…This article concerns the problem of input-to-state stabilization for a group of uncertain nonlinear systems equipped with nonabsolutely available states and exogenous disturbances. …”
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Transformation of CLF to ISS-CLF for Nonlinear Systems with Disturbance and Construction of Nonlinear Robust Controller with L2 Gain Performance by Keizo Okano, Kojiro Hagino, Hidetoshi Oya

“…A new nonlinear control law for a class of nonlinear systems with disturbance is proposed. A control law is designed by transforming control Lyapunov function (CLF) to input-to-state stability control Lyapunov function (ISS-CLF). …”
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Finite-Time Tracking Control for Nonstrict-Feedback State-Delayed Nonlinear Systems with Full-State Constraints and Unmodeled Dynamics by Yangang Yao, Jieqing Tan, Jian Wu

“…The problem of finite-time tracking control is discussed for a class of uncertain nonstrict-feedback time-varying state delay nonlinear systems with full-state constraints and unmodeled dynamics. …”
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A Kind of FM-BEM Penalty Function Method for a 3D Elastic Frictional Contact Nonlinear System by Chunxiao Yu, Dinghui Jing, Chang Fu, Yanfang Yang

“…By using the least square method and penalty function method, an optimization mathematical model and a mathematical programming model with a penalty factor are established for the node_face frictional contact nonlinear system. For the two models, a penalty optimization IGMRES (m) algorithm is proposed, and the influences of different penalty factors on the solution of the whole system are analyzed. …”
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Bolt loosening detection in a jointed beam using empirical mode decomposition–based nonlinear system identification method by Chao Xu, Chen-Chen Huang, Wei-Dong Zhu

“…In this work, a state-of-art nonlinear system identification method based on empirical mode decomposition is utilized and extended to detect bolt loosening in a jointed beam. …”
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LMI-Based Robust Stabilization of a Class of Input-Constrained Uncertain Nonlinear Systems with Application to a Helicopter Model by Hassène Gritli

“…This paper is concerned with the robust stabilization of a class of continuous-time nonlinear systems, with an application to the pitch dynamics of a simple helicopter model, via an affine state-feedback control law using the linear matrix inequality (LMI) approach. …”
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Hierarchical Newton Iterative Parameter Estimation of a Class of Input Nonlinear Systems Based on the Key Term Separation Principle by Cheng Wang, Kaicheng Li, Shuai Su

“…This paper investigates the identification problem for a class of input nonlinear systems whose disturbance is in the form of the moving average model. …”
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Finite-Time Adaptive Tracking Control for a Class of Pure-Feedback Nonlinear Systems with Disturbances via Decoupling Technique by Qiangqiang Zhu, Ben Niu, Shengtao Li, Peiyong Duan, Dong Yang

“…This paper addresses the finite-time adaptive tracking control problem for a class of pure feedback nonlinear systems whose nonaffine functions may not be differentiable. …”
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A State-Dependent Impulsive Nonlinear System with Ratio-Dependent Action Threshold for Investigating the Pest-Natural Enemy Model by Ihsan Ullah Khan, Saif Ullah, Ebenezer Bonyah, Basem Al Alwan, Ahmed Alshehri

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Homeomorphism Mapping Based Neural Networks for Finite Time Constraint Control of a Class of Nonaffine Pure-Feedback Nonlinear Systems by Jianhua Zhang, Quanmin Zhu, Yang Li, Xueli Wu

“…This paper proposes a new scheme for solving finite time neural networks adaptive tracking control issue for the nonaffine pure-feedback nonlinear system. The procedure, based on homeomorphism mapping and backstepping, effectively deals with constraint control and design difficulty induced by pure-feedback structure. …”
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