Fixed‐time disturbance observer based distributed cooperative containment control with fixed‐time anti‐saturation compensator for multi‐unmanned aerial vehicles

Cui, Lei; Zhou, Qi; Huang, Di

doi:10.1002/rnc.6902

Cited by 3 publications

(1 citation statement)

References 26 publications

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“…Subsequently, many DOs such as a linear DO, 22 exponential DOs, 23,24 sliding mode DOs 25,26 and finite-time DOs 27,28 are respectively researched on estimating these adverse effects. Extensive and wide applications are carried out in various fields including underwater vehicles, 29 permanent magnet synchronous motors, 30,31 unmanned aerial vehicles, [32][33][34] and so forth. From a remarkable observation performance point of view, FXDOs can be designed and applied.…”

Section: Introductionmentioning

confidence: 99%

Fixed‐time sliding mode trajectory tracking control for marine surface vessels under mismatched conditions and input saturation

Zhang,

Yu,

Yan

et al. 2024

Intl J Robust & Nonlinear

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SummaryThis paper addresses a trajectory tracking control problem for marine surface vessels (MSVs) in the presence of mismatched conditions and input saturation. Firstly, an MSV model under mismatched conditions is established to solve the problem of unreasonable modeling methods in the existing literature. Secondly, fixed‐time disturbance observers (FXDOs) are designed, where the designed FXDOs not only avoid selecting complicated parameters but also has simple structures, and the disturbance estimation errors can converge to the origin within a setting time. Thirdly, based on the FXDOs and an anti–saturation auxiliary dynamic system, a trajectory tracking control scheme in the presence of mismatched conditions and input saturation is constructed by virtue of fixed‐time integral sliding mode control (SMC), and the actual tracking error signals are uniformly fixed‐time bounded rather than finite‐time one. Fourthly, in order to decrease theoretical calculation values of the original setting time in fixed‐time control, the new setting time under three different parameter conditions is derived, and thus reducing the conservatism. Finally, the simulation results are provided to show the effectiveness and superiority of the designed tracking control scheme.

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Section: Introductionmentioning

confidence: 99%

Fixed‐time sliding mode trajectory tracking control for marine surface vessels under mismatched conditions and input saturation

Zhang,

Yu,

Yan

et al. 2024

Intl J Robust & Nonlinear

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Sampled‐data cooperative semi‐global robust practical output regulation for nonlinear multi‐agent systems with an uncertain leader

Liu,

Zeng,

Liu

2024

Intl J Robust & Nonlinear

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This article explores the problem of sampled‐data cooperative robust practical output regulation for nonlinear multi‐agent systems whose leader system is unknown. In this study, the nonlinearities of the follower systems are not constrained by the linear growth condition. Based on the robust control technology and the adaptive control technology, a distributed output‐based sampled‐data control protocol is developed to deal with the uncertainty of the exosystem which can belong to any large known compact set. We first perform the coordinate transformation of closed‐loop system to obtain the so‐called augmented system, and then perform the stability analysis for this system. As a result, it is proven that the steady‐state tracking errors are in any small given neighborhood of the origin. Finally, the performance of the proposed controller is validated by a numerical example.

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Neural network disturbance observer-based anti- saturation backstepping control for hypersonic vehicles

Dai,

Feng,

Wang

et al. 2024

Preprint

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This study proposes a radial basis function neural network disturbance observer (RBFNNDO) based anti-saturation backstepping controller for hypersonic vehicles with input saturations and multiple disturbances. Firstly, in response to the problem of “exploding complexity” in backstepping controller, we adopted finite-time tracking differentiators (FTD), which realized higher tracking accuracy and tracking speed than those of the existing methods. Secondly, we developed multivariable neural network disturbance observers to estimate the lumped disturbances involving aerodynamic uncertainties and external disturbances, thereby improving the robustness of the proposed controller. Thirdly, in order to alleviate the input saturation and minimize the duration time, we used an adaptive fixed-time anti-saturation compensator (AFAC). The simulation results have proven that our proposed backstepping controller outperforms other existing methods in terms of control performance and saturation time.

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Fixed‐time disturbance observer based distributed cooperative containment control with fixed‐time anti‐saturation compensator for multi‐unmanned aerial vehicles

Cited by 3 publications

References 26 publications

Fixed‐time sliding mode trajectory tracking control for marine surface vessels under mismatched conditions and input saturation

Fixed‐time sliding mode trajectory tracking control for marine surface vessels under mismatched conditions and input saturation

Sampled‐data cooperative semi‐global robust practical output regulation for nonlinear multi‐agent systems with an uncertain leader

Neural network disturbance observer-based anti- saturation backstepping control for hypersonic vehicles

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