Prescribed‐Time/Fixed‐Time Synchronization of Quaternion‐Valued Neural Networks: A Method Without Decomposition
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DOI: 10.1002/mma.10788
Abstract: In this paper, a novel control law is designed for achieving prescribed‐time (PAT) and fixed‐time (FXT) synchronization of quaternion‐valued neural networks (QVNNs) with time‐varying delays. Compared with some existing methods, the designed controller can realize… read more here.
Keywords: time; synchronization; fixed time; synchronization quaternion ... See more keywords
Nonsingular prescribed‐time stabilization of a class of uncertain nonlinear systems: A novel coordinate mapping method
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DOI: 10.1002/rnc.4949
Abstract: This article investigates the nonsingular prescribed‐time stabilization problem for p‐normal form systems. Two significant progresses are made for the first time as follows: First, a novel concept named coordinate mapping of time domain, is proposed… read more here.
Keywords: time; coordinate mapping; time stabilization; nonsingular prescribed ... See more keywords
Prescribed‐time control of uncertain strict‐feedback‐like systems
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DOI: 10.1002/rnc.5541
Abstract: In this paper, we present a control method for achieving prescribed‐time regulation of strict‐feedback‐like systems in the presence of unknown yet time‐varying control gains and mismatched uncertainties. The developed control algorithms are capable of full‐state… read more here.
Keywords: time; feedback like; like systems; strict feedback ... See more keywords
Prescribed‐Time Event‐Triggered Synchronization for High‐Order Nonlinear Multi‐Agent Systems Over Directed Communication Graphs
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DOI: 10.1002/rnc.70094
Abstract: This article tackles the prescribed‐time (PT) leaderless synchronization control problem of high‐order nonlinear Multi‐Agent Systems (MASs) sharing information over directed communication graph topologies while ensuring the communication network workload saving. To this aim, a novel… read more here.
Keywords: time; event triggered; synchronization; prescribed time ... See more keywords
Prescribed‐Time Disturbance Observer‐Based Sliding Mode Control for Uncertain Manipulator Systems Under Dos Attack
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DOI: 10.1002/rnc.70304
Abstract: The predefined‐time nonsingular fast terminal sliding mode (NFTSM) control problem is studied based on a prescribed‐time disturbance observer (PTDO) for a robotic manipulator system with Denial‐of‐Service (DoS) attack. Firstly, a new predefined‐time NFTSM control strategy… read more here.
Keywords: time; control; dos attack; time disturbance ... See more keywords
Symmetry‐Based Control and State Estimation of Nonlinear Systems in Prescribed Time
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DOI: 10.1002/rnc.70306
Abstract: In this paper, we design novel types of smooth time‐varying controllers/observers for lower triangular nonlinear systems with prescribed time convergence. We prove the results under very mild conditions: No global restrictions or bounds on the… read more here.
Keywords: nonlinear systems; time; symmetry based; prescribed time ... See more keywords
Enhanced extended state observer based prescribed time tracking control of wheeled mobile robot with slipping and skidding
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DOI: 10.1002/rnc.7347
Abstract: This article focuses on the trajectory tracking control for a perturbed wheeled mobile robot (WMR) with slipping and skidding. The external disturbances and uncertainties caused by the slipping and skidding compose the “total” disturbance. By… read more here.
Keywords: tracking control; control; slipping skidding; prescribed time ... See more keywords
Geometric prescribed‐time control of quadrotors with adaptive extended state observers
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DOI: 10.1002/rnc.7353
Abstract: This article studies an adaptive extended state observer (AESO) based prescribed‐time geometric attitude stabilization problem of quadrotors with endogenous uncertainties, exogenous disturbances, and actuator saturation, which can be estimated and compensated by AESOs. The employment… read more here.
Keywords: time; control; extended state; prescribed time ... See more keywords
Prescribed‐Time Distributed Optimization With Set Constraints Based on Time‐Domain Transformation
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DOI: 10.1002/rnc.7730
Abstract: This paper delves into the prescribed‐time distributed optimization problem for multi‐agent systems (MASs), considering set constraints. First, we transform the challenging optimization problem from the prescribed‐time ‐domain into the asymptotic time ‐domain through a time‐domain… read more here.
Keywords: time; set constraints; time domain; prescribed time ... See more keywords
Backstepping‐Based Composite Prescribed‐Time Control for Two‐Time‐Scale Systems
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DOI: 10.1002/rnc.7827
Abstract: This paper explores the design of a composite prescribed‐time controller for two‐time‐scale systems (TTSSs). First, due to numerical issues caused by the small perturbation parameter, standard control design techniques for prescribed‐time stabilization of regular linear… read more here.
Keywords: time; two time; scale systems; time scale ... See more keywords
Prescribed‐Time Bipartite Formation Control for Heterogeneous UGVs–UAVs Systems With Improved Extended State Observers
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DOI: 10.1002/rnc.7972
Abstract: This article aims to address two challenging issues in heterogeneous systems composed of unmanned aerial vehicles (UAV) and unmanned ground vehicles (UGV): 1) compensating for system disturbances within prescribed‐time and 2) maintain the non‐zero speed… read more here.
Keywords: time; control; extended state; prescribed time ... See more keywords