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 共查询到20条相似文献,搜索用时 31 毫秒
1.
Mei  Yu  Wang  Jing  Park  Ju H.  Shi  Kaibo  Shen  Hao 《Nonlinear dynamics》2022,107(4):3629-3640
Nonlinear Dynamics - The adaptive fixed-time control problem for nonlinear systems with time-varying actuator faults is investigated in this paper. A novel adaptive fixed-time controller is...  相似文献   

2.
Huang  Yi  Jia  Yingmin 《Nonlinear dynamics》2018,91(2):1289-1306
Nonlinear Dynamics - This paper is devoted to the fixed-time consensus tracking control problem for a class of second-order nonlinear multi-agent systems. Firstly, a fixed-time consensus control...  相似文献   

3.
Ni  Junkang  Liu  Ling  Liu  Chongxin  Hu  Xiaoyu 《Nonlinear dynamics》2017,89(3):2065-2083

This paper presents fractional order fixed-time nonsingular terminal sliding mode control for stabilization and synchronization of fractional order chaotic systems with uncertainties and disturbances. First, a novel fractional order terminal sliding mode surface is proposed to guarantee the fixed-time convergence of system states along the sliding surface. Second, a nonsingular terminal sliding mode controller is designed to force the system states to reach the sliding surface within fixed-time and remain on it forever. Furthermore, the fractional Lyapunov stability theory is used to prove the fixed-time stability and the robustness of the proposed control scheme and estimate the upper bound of convergence time. Next, the proposed control scheme is applied to the synchronization of two nonidentical fractional order Liu chaotic systems and chaos suppression of fractional order power system. Simulation results verify the effectiveness of the proposed control scheme. Finally, some application issues about the proposed scheme are discussed.

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4.
Tian  Bailing  Lu  Hanchen  Zuo  Zongyu  Wang  Hong 《Nonlinear dynamics》2018,94(4):2889-2899
Nonlinear Dynamics - The fixed-time stabilization of high-order integrator systems with both matched and mismatched disturbances is investigated. A continuous non-switching control law is designed...  相似文献   

5.
Liu  Xinggui  Liao  Xiaofeng 《Nonlinear dynamics》2019,96(2):1497-1509
Nonlinear Dynamics - In this paper, the locally fixed-time and globally fixed-time stabilization problems for the port-Hamiltonian (PH) systems via the interconnection and damping assignment...  相似文献   

6.
Wang  Huanqing  Yue  Hanxue  Liu  Siwen  Li  Tieshan 《Nonlinear dynamics》2020,102(4):2617-2625
Nonlinear Dynamics - This paper focuses on the problem of fixed-time chaos suppression and stabilization of a class of Lorenz systems with uncertain parameters. Based on the fixed-time stability...  相似文献   

7.
Yao  Yangang  Tan  Jieqing  Wu  Jian  Zhang  Xu 《Nonlinear dynamics》2021,105(1):403-416
Nonlinear Dynamics - The problem of event-triggered fixed-time control for state-constrained stochastic nonlinear systems is discussed in this article. Different from the barrier Lyapunov function...  相似文献   

8.
Wang  Xiaolin  Xu  Jihui  Lv  Maolong  Zhang  Lei  Zhao  Zilong 《Nonlinear dynamics》2022,110(1):381-394
Nonlinear Dynamics - This article proposes a fixed-time adaptive fault-tolerant control methodology for a larger class of high-order (powers are positive odd integers) nonlinear systems subject to...  相似文献   

9.

This paper introduces a homogeneous controller along a fixed-time state and fault observer for finite-time stabilization and fault accommodation of a remotely-operated vehicle in the presence of actuator saturation and rate limits. For this, a novel tuning algorithm is improvised for manipulating the degree of homogeneity in homogeneous controllers to effectively acquire different properties from the overall control system. The tuning of degree of homogeneity is based on vehicle’s velocity. The proposed algorithm results in a switching-type controller, which undergoes three different stages during the operation, to eliminate the sensitivity of conventional finite-time and fixed-time controllers to large initial errors in the presence of thruster constraints. In addition, a new fixed-time fault and state observer is designed for the realization of output feedback control and fault tolerance by combining a fixed-time state observer with a fault estimation unit. In contrast to conventional extended-state observers, this observer considers the dynamics of the thruster system in its formulation so that better performance can be provided for the control system upon thruster failures. Control allocation is utilized to accommodate thruster failures and faults and to take account of thruster saturation and rate limits. Stability analyses are carried out for the overall control system and the proposed observer. It is shown that the closed-loop control system would be globally finite-time stable. The state estimation subsystem is fixed-time stable and the fault estimation unit is input-to-state stable. Simulations are carried out and comparisons are made with several finite-time and fixed-time controllers to outline the advantages of the proposed homogeneous controller and the benefits of the overall fault-tolerant control system.

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10.
Shen  Ganghui  Xia  Yuanqing  Zhang  Jinhui  Cui  Bing 《Nonlinear dynamics》2020,102(4):2687-2698
Nonlinear Dynamics - This paper develops a fixed-time trajectory tracking control scheme for Mars entry vehicle under uncertainty. First, a novel fixed-time nonsingular terminal sliding mode...  相似文献   

11.
Zhu  Chengzhi  Jiang  Yiming  Yang  Chenguang 《Nonlinear dynamics》2022,109(2):849-861
Nonlinear Dynamics - In this paper, an adaptive NN (neural network) control scheme is proposed for uncertain robot systems to achieve fixed-time convergence. With the proposed fixed-time NN...  相似文献   

12.
Nonlinear Dynamics - This paper addresses the problem of consensus tracking with fixed-time convergence, for leader–follower multi-agent systems with double-integrator dynamics, where only a...  相似文献   

13.
Liu  Xiaoyang  Ho  Daniel W. C.  Song  Qiang  Cao  Jinde 《Nonlinear dynamics》2017,90(3):2057-2068
Nonlinear Dynamics - This paper investigates the finite-time and fixed-time stabilization (FFTS) of switched systems with discontinuous dynamics, external disturbances and delays. Firstly, a new...  相似文献   

14.
Sai  Huayang  Xu  Zhenbang  Xia  Chengkai  Sun  Xiangyang 《Nonlinear dynamics》2022,110(1):431-448

This paper studies an approximate continuous fixed-time terminal sliding mode control (CFTSMC) with prescribed performance for uncertain robotic manipulators. A transformation concerning tracking error using a fixed-time prescribed performance function is proposed to guarantee the transient and steady-state performance of trajectory tracking control for uncertain robotic manipulators within fixed time. Utilizing the transformed error, a smooth fixed-time sliding mode surface is designed. Then, based on the proposed sliding mode surface, an approximate CFTSMC scheme is presented to achieve inherent chattering-free control for uncertain robotic manipulators. According to the Lyapunov stability theory, it is proved that the position tracking error can be bounded in the prescribed performance boundaries and globally converges to a defined small region within fixed time and then approaches exponentially to the origin. Several numerical simulation results demonstrate the effectiveness and superiority of the proposed control strategy for uncertain robotic manipulators.

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15.
Yao  Hejun  Gao  Fangzheng  Huang  Jiacai  Wu  Yuqiang 《Nonlinear dynamics》2020,99(4):2835-2849

The fixed-time stabilization problem is addressed in this paper for a kind of nonholonomic systems in chained form with unmatched uncertainties and time-varying output constraints. A novel tan-type barrier Lyapunov function is introduced to deal with time-varying output constraints. Under the unified framework of the considered system with and without output constraints, a state feedback controller is designed with the aid of adding a power integrator technique and switching control strategy. It is shown that the suggested controller ensures the states of closed-loop system to zero in a given fixed time without disobeying the constraints. Finally, simulation results are given to confirm the efficacy of the presented control scheme.

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16.
Liu  Kang  Wang  Rujing  Zheng  Shijian  Dong  Shifeng  Sun  Guowei 《Nonlinear dynamics》2022,107(3):2363-2390
Nonlinear Dynamics - This study focuses on the design of a fixed-time disturbance observer-based robust fault-tolerant tracking control scheme for an uncertain quadrotor unmanned aerial vehicle...  相似文献   

17.
Cao  Lu  Xiao  Bing  Golestani  Mehdi 《Nonlinear dynamics》2020,100(3):2505-2519
Nonlinear Dynamics - A robust fixed-time control framework is presented to stabilize flexible spacecraft’s attitude system with external disturbance, uncertain parameters of inertia, and...  相似文献   

18.
Zhang  Liang  Wei  Changzhu  Jing  Liang  Cui  Naigang 《Nonlinear dynamics》2018,93(4):2543-2563
Nonlinear Dynamics - This paper studies a novel adaptive fixed-time sliding mode attitude tracking control for a submarine-launched missile, which is affected by sea winds, sea waves, ocean...  相似文献   

19.

In the present article, a terminal sliding mode control strategy has been proposed in order to address the synchronization problem for a class of perturbed nonlinear systems with fixed convergence time and input quantization. The proposed protocol guarantees the fixed-time convergence of the sliding manifold to the origin, which means that the convergence time of the proposed sliding manifold does not change on the variations of initial values, different from typical control methods. Here, the hysteresis quantizer, as a specific type of quantizer with nonlinear sector-bounded, is applied in order to quantize the input signal. The proposed quantized control scheme vigorously prevents the potential adverse chattering phenomenon which is experienced in the common quantization methods. The proposed controller does not need the limiting criteria related to considered parameters of quantization compared to recent control approaches. Finally, the designed controller is implemented on the perturbed Genesio–Tesi (G–T) chaotic systems to verify effectiveness and strength of the proposed method.

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20.
This paper studies systematically a Bedd-ington?CDeAngelis prey?Cpredator system with harvesting and impulsive state feedback control. Conditions for existence and stability of predator-free periodic solution are obtained. When the predator-free periodic solution loses its stability, the existence and stability of nontrivial period solution are also established. Furthermore, computer simulations show that this impulsive system displays a series of complex phenomena, including period-doubling bifurcation and cascade, period window, and chaotic bands. Through numerical simulation, it is also observed that capture capability can influence the amount of predator released and the interval of the stability for nontrivial period-1 solution. Moreover, the superiority of impulsive state feedback control strategy is also exhibited over the impulsive fixed-time control.  相似文献   

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