Event-triggered finite-time adaptive neural control for nonlinear non-strict-feedback time-delay systems with disturbances

Gao, Chuang; Liu, Xin; Yang, Yana; Li, Xiaoping; Li, Ping

doi:10.1016/j.ins.2020.05.008

“…The non-strict feedback system in (1) is usually applied to the study of adaptive control, such as in [31][32][33] . The single-link manipulator in [34][35][36][37] can be expressed in the form of the system.…”

Section: System Descriptionmentioning

confidence: 99%

“…Therefore, in the simulation design of this section, the system model of single-link manipulator in [35][36][37] is adopted, the adaptive fuzzy controller designed in this paper is applied to the control of single-link manipulator, and the time-varying asymmetric constraint interval is designed to restrict the rotation angle, rotation speed and torque of single-link manipulator.…”

Section: Example 2: Application Examplementioning

confidence: 99%

Full-state time-varying asymmetric constraint control for non-strict feedback nonlinear systems based on dynamic surface method

Yang

¹

,

dong

²

,

zhang

³

et al. 2022

Preprint

0

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We investigate the tracking control problem for the class of the non-strict feedback nonlinear system with external disturbance and time-varying asymmetric full state constraints. Firstly, the unknown nonlinear term with external disturbance in the system are estimated by fuzzy logic system. The backstepping method is applied to the design of adaptive fuzzy controller. However, to prevent that the constraints are overstepped. By introducing novel tan-type time-varying asymmetric barrier Lyapunov function (TABLF) in each step of backstepping design. Secondly, the dynamic surface control (DSC) is introduced in the algorithm design to solve the complex problem of controller caused by the derivative of virtual control value. The proposed control scheme can speed up the tracking speed of the system. Compared with the previous work, it is verifified that the combination of DSC and TABLF can obtain good performance within the constraint range, and can ensure fast and stable tracking convergence under external disturbance. Finally, two simulation examples verify the performance of the adaptive controller.

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“…Remark 4: In order to apply backstepping method to the design of controller for non-strict feedback nonlinear system, the control method proposed removes the restriction that the absolute value of the unknown function needs to meet the linear growth in [36,37], which makes the proposed control scheme more widely used.…”

Section: /17mentioning

confidence: 99%

Full-State Time-Varying Asymmetric Constraint Control For Non-Strict Feedback Nonlinear Systems Based On Dynamic Surface Method

Yang

¹

,

dong

²

,

Wang

³

et al. 2022

Preprint

0

View full text Add to dashboard Cite

We investigate the tracking control problem for the class of the non-strict feedback nonlinear system with external disturbance and time-varying asymmetric full state constraints. Firstly, the unknown nonlinear term with external disturbance in the system are estimated by fuzzy logic system. The backstepping method is applied to the design of adaptive fuzzy controller. However, to prevent that the constraints are overstepped. By introducing novel tan-type time-varying asymmetric barrier Lyapunov function (TABLF) in each step of backstepping design. Secondly, the dynamic surface control (DSC) is introduced in the algorithm design to solve the complex problem of controller caused by the derivative of virtual control value. The proposed control scheme can speed up the tracking speed of the system. Compared with the previous work, it is verifified that the combination of DSC and TABLF can obtain good performance within the constraint range, and can ensure fast and stable tracking convergence under external disturbance. Finally, two simulation examples verify the performance of the adaptive controller.

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“…On the basis of the sliding mode control theory, these two control approaches can guarantee a fast convergence rate while the rejection for the external disturbance or system modeling uncertainty is also realized simultaneously. An event‐triggered finite‐time controller is provided in Reference 6 while the communication burden is reduced. To attenuate the impact caused by the external disturbance and actuator fault, Reference 7 proposed a terminal sliding mode control strategy to improve the tracking precision.…”

Section: Introductionmentioning

confidence: 99%

Robust free‐time‐stable fault tolerant control for rigid satellite attitude system with output constraint

Zhou

¹

,

Zhu

²

,

Xu

³

et al. 2021

Intl J Robust & Nonlinear

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This article investigates the robust fault tolerant control strategy for a rigid satellite attitude system with external disturbance and actuator fault while the predesigned output constraint is taken into consideration. Based on the interval observer technique, an identical faulty signal reconstruction is first realized by utilizing pure mathematical calculation. Then, to guarantee the desired output constraint, the proposed prescribed performance fault tolerant control framework is constructed with a novel error interval representation which not only reduces the computation burden but also simplifies the output constrained controller design. In addition, by comparing with the existing finite/fixed time control method, the setting time for this control strategy can be assigned freely. The stability of the whole method is guaranteed by Lyapunov method. Finally, simulation results including comparisons with existing work show the effectiveness and advantages of the proposed approach.

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Event-triggered finite-time adaptive neural control for nonlinear non-strict-feedback time-delay systems with disturbances

Cited by 42 publications

References 44 publications

Full-state time-varying asymmetric constraint control for non-strict feedback nonlinear systems based on dynamic surface method

Full-state time-varying asymmetric constraint control for non-strict feedback nonlinear systems based on dynamic surface method

Full-State Time-Varying Asymmetric Constraint Control For Non-Strict Feedback Nonlinear Systems Based On Dynamic Surface Method

Robust free‐time‐stable fault tolerant control for rigid satellite attitude system with output constraint

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