Dynamic Positioning Control System with Input Time-Delay Using Fuzzy Approximation Approach

Xia, Guoqing; Xue, Jingjing; Jiao, Jinpeng

doi:10.1007/s40815-017-0372-4

Cited by 17 publications

(6 citation statements)

References 30 publications

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“…Consider vessel dynamic modeled by ( 1) and ( 2) with input delay satisfying assumptions 1 and 2. Under virtual control (19) and the proposed controller (29), the motion of LNG Carrier converges to the predefined operation area, and the error signals in the DP system are uniformly ultimately bounded.…”

Section: Resultsmentioning

confidence: 99%

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Dynamic control for LNG carrier with output constraints

Liang

Zhang

et al. 2022

IET Control Theory & Appl

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This paper addresses constrained robust control for dynamic positioning of the Liquefied Natural Gas (LNG) Carrier in side-by-side offloading operations subject to input time delay. During the LNG offloading operation, the relative motions of the multibody system are connected by the LNG offloading arm. To ensure the operation safety, robust control with asymmetric Barrier Lyapunov Function is proposed considering predefined output constraints under the unknown dynamics and external disturbances. In offshore engineering, due to the mechanical effects, the thrusters of the LNG carrier in the presence of time-delay should be investigated to guide the design practice. The predictor-based method is employed to deal with the time delay induced by the control inputs. It is proven that the proposed scheme can guarantee semi-global uniform ultimate boundedness. The performance and feasibility of the proposed control are further verified by simulation studies.

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Section: Resultsmentioning

confidence: 99%

“…The backstepping technique has been carried out involving input time delay [28,43]. Backstepping control law has been designed to solve the problem of input time-delay to ship dynamic positioning via Lyapunov approach [29]. Constrained control of linear time-delay system has been proposed based on explicit reference governor approach [30].…”

Section: Introductionmentioning

confidence: 99%

Dynamic control for LNG carrier with output constraints

Liang

Zhang

et al. 2022

IET Control Theory & Appl

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“…The desired position, desired heading, and desired velocities in three directions are smooth and converged to the given value of 0 within 100 . Besides, the bias term b introduced in (3) including wind, waves, and ocean currents disturbances is computed in [6,20] (Xia, G., Xue, J., Jiao, J, 2018, Fossen, T. I, 2002).…”

Section: Simulation Studymentioning

confidence: 99%

“…The paper in [5] (Kim Y S, Kim J, Sung H G, 2016) applied nonlinear backstepping technique in weather-optimal controller designed for DP control system to maintain ship in a fixed position. The study in [6] (Xia, G., Xue, J., Jiao, J, 2018) combined backstepping technique with fuzzy approach to resolve the problem of time-delay and uncertainties in DP control system. The authors in [7] (Morishita H M, Souza C E S, 2014) developed an attenuating control law on basis of observer backstepping methodology for DP control system considering the saturation of actuators.…”

Section: Introductionmentioning

confidence: 99%

Backstepping Control Using Barrier Lyapunov Function for Dynamic Positioning Control System with Passive Observer

Xia

Xue

Sun

et al. 2019

Mathematical Problems in Engineering

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This paper presents a backstepping controller using barrier Lyapunov function (BLF) for dynamic positioning (DP) system. For safety reasons, the position and heading of DP ship are to be maintained in certain range. Thus, in this paper, a control law based on BLF and backstepping technique is proposed to limit the position and heading. The closed-loop system is proved stable in the sense of Lyapunov stability theories. In addition, since the velocities of ship are not measurable and the wave frequency (WF) motion is unavailable, a passive observer is adopted to estimate the velocities and the effect of WF motion. The simulation results show that the proposed controller can limit the position and heading of the vessel in a predefined range and verify the performance of the proposed controller and the passive observer.

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“…Hence, many adaptive control strategies had already been employed to head o the disturbances. Reference [9] advocated the adaptive fuzzy control strategy, where the fuzzy logic computation method was applied to estimate unmodeled dynamic features and time-varying disturbances. In [10,11], the incorporation of adaptive techniques based on approximation and neural network methods based on radial basis function were used to tackle the unknown disturbances and uncertain vessel dynamic feature.…”

Section: Introductionmentioning

confidence: 99%

Finite-Time Control of Dynamic Positioning Vessel Based on Disturbance Observer

Xia

Zhang

2022

Mathematical Problems in Engineering

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In this paper, a finite-time controller is proposed for dynamic positioning vessels with error constraints and prescribed performance. A nonlinear observer is employed to give the estimations of the unknown disturbances containing an uncertain model, and the estimation errors converge to the equilibrium point in a finite time. A finite-time controller is developed based on the nonlinear observer. Finally, the effectiveness of the proposed control strategies is demonstrated by simulation.

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Dynamic Positioning Control System with Input Time-Delay Using Fuzzy Approximation Approach

Cited by 17 publications

References 30 publications

Dynamic control for LNG carrier with output constraints

Dynamic control for LNG carrier with output constraints

Backstepping Control Using Barrier Lyapunov Function for Dynamic Positioning Control System with Passive Observer

Finite-Time Control of Dynamic Positioning Vessel Based on Disturbance Observer

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