Robust mixed $$H_2 /H_\infty $$ H 2 / H ∞ active control for offshore steel jacket platform

Yang, Jia

doi:10.1007/s11071-014-1531-x

Cited by 25 publications

(11 citation statements)

References 18 publications

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“…Therefore, this subsection will design a numerical algorithm to decide the iteration number based on the performance index in each iteration. Based on (17), the feasible controller is designed as…”

Section: The Feasibility Of Aowdacmentioning

confidence: 99%

“…Unfortunately, the unsafely behaviors and destabilization of offshore platforms mainly result from nonlinear dynamics. Many researchers have engaged in the efforts to the implementation of control schemes for nonlinear offshore platforms, e.g., a robust mixed control method for wave-excited offshore jacket platforms is proposed in [17] to minimize the upper bound of the performance measure on platform dynamics satisfying some norm bound constraint simultaneously; a novel sliding mode control scheme is proposed by using information about mixed current and delayed states in [18]; by combining a sliding mode control technique, the adaptive control algorithm and wavelet support vector machine, an adaptive integral sliding mode control to handle the nonlinear behavior of the offshore platform in [19]. Meanwhile, the optimal vibration control theories provide efficient methods to improve the control performance of control systems with smaller control consumption [20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

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Digital-Control-Based Approximation of Optimal Wave Disturbances Attenuation for Nonlinear Offshore Platforms

et al. 2017

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Abstract:The irregular wave disturbance attenuation problem for jacket-type offshore platforms involving the nonlinear characteristics is studied. The main contribution is that a digital-control-based approximation of optimal wave disturbances attenuation controller (AOWDAC) is proposed based on iteration control theory, which consists of a feedback item of offshore state, a feedforward item of wave force and a nonlinear compensated component with iterative sequences. More specifically, by discussing the discrete model of nonlinear offshore platform subject to wave forces generated from the Joint North Sea Wave Project (JONSWAP) wave spectrum and linearized wave theory, the original wave disturbances attenuation problem is formulated as the nonlinear two-point-boundary-value (TPBV) problem. By introducing two vector sequences of system states and nonlinear compensated item, the solution of introduced nonlinear TPBV problem is obtained. Then, a numerical algorithm is designed to realize the feasibility of AOWDAC based on the deviation of performance index between the adjacent iteration processes. Finally, applied the proposed AOWDAC to a jacket-type offshore platform in Bohai Bay, the vibration amplitudes of the displacement and the velocity, and the required energy consumption can be reduced significantly.

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Section: The Feasibility Of Aowdacmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Digital-Control-Based Approximation of Optimal Wave Disturbances Attenuation for Nonlinear Offshore Platforms

et al. 2017

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“…Therefore, ever-increasing attention has been paid to active control. To mention a few, to reduce vibration of the platform, a robust mixed H 2 /H ∞ control strategy is proposed [13]. In [8] and [14], the offshore platform is modelled as an uncertain system and some integral sliding mode control schemes are developed.…”

Section: Introductionmentioning

confidence: 99%

Hybrid-Driven-Based H_∞ Control for Offshore Steel Jacket Platforms in Network Environments

et al. 2020

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This paper investigates the hybrid-driven-based networked control for an offshore steel jacket platform subject to external wave forces. A hybrid driven strategy is introduced to deal with the problem of networked control for offshore platforms. Then, the networked closed-loop system is modeled as a stochastic delay system. Based on this model, a stability criterion is derived using the stochastic control theory and the Lyapunov-Krasovskii functional method. Simulation results show that the hybrid-driven-based networked H ∞ controller is effective to suppress the vibration of the platform and save the limited network resources as well. Moreover, the designed controller is flexible in terms of maintaining a balance between performance requirements of the offshore platform and the utilization of communication network bandwidth. INDEX TERMS Offshore platform, networked control system, H ∞ control, stochastic system, hybrid driven strategy.

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“…There are also some nonlinear control methods to suppress the disturbance of offshore wind turbine. A robust mixed H2/H∞ active control algorithm is proposed to improve the performance of offshore platform system in [23]. A dual loop control strategy is proposed to suppress the influence of voltage disturbance on doubly fed induction generator(DFIG) in [24].…”

Section: Introductionmentioning

confidence: 99%

L2 Disturbance Suppression Controller Design for Multiple Time Delays Offshore Wind Turbines

et al. 2020

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With the large-scale development of offshore wind power and the rapid development of smart grid, more and more attention has been paid to the stable operation of wind turbines under various conditions. In the actual operation process of wind turbines, there are inevitably many kinds of uncertain time delays, and also external or parameter disturbances, which affect the stable operation of wind turbines and make the system deviate from the original stable state. Based on Hamiltonian energy theory, the disturbance rejection of doubly fed wind turbines with multiple time delays is studied in this paper. Firstly, the doubly fed wind turbine is Hamiltonian realized to obtain its port controlled Hamiltonian with dissipation(PCH-D) model. Then, aiming at the PCH-D model, a multiple time delays controller is designed based on Casimir function, which can make wind turbines run stably under multiple time delays. Furthermore, based on the passive control theory, L2 gain disturbance rejection control technology is introduced to eliminate the steady-state error caused by external disturbance and improve the stability of wind turbines. Finally, the simulation results show that the proposed controller can effectively solve the multiple time delays and disturbance problems in the system, and improve the stability and anti-interference of wind turbines. INDEX TERMS Offshore wind power, doubly fed wind turbines, multiple time delays, Hamiltonian energy theory, Casimir function, L2 disturbance attenuation.

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Robust mixed $$H_2 /H_\infty $$ H 2 / H ∞ active control for offshore steel jacket platform

Cited by 25 publications

References 18 publications

Digital-Control-Based Approximation of Optimal Wave Disturbances Attenuation for Nonlinear Offshore Platforms

Digital-Control-Based Approximation of Optimal Wave Disturbances Attenuation for Nonlinear Offshore Platforms

Hybrid-Driven-Based H_∞ Control for Offshore Steel Jacket Platforms in Network Environments

L2 Disturbance Suppression Controller Design for Multiple Time Delays Offshore Wind Turbines

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Robust mixed $$H_2 /H_\infty $$ H 2 / H ∞ active control for offshore steel jacket platform

Cited by 25 publications

References 18 publications

Digital-Control-Based Approximation of Optimal Wave Disturbances Attenuation for Nonlinear Offshore Platforms

Digital-Control-Based Approximation of Optimal Wave Disturbances Attenuation for Nonlinear Offshore Platforms

Hybrid-Driven-Based H∞ Control for Offshore Steel Jacket Platforms in Network Environments

L2 Disturbance Suppression Controller Design for Multiple Time Delays Offshore Wind Turbines

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Product

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Hybrid-Driven-Based H_∞ Control for Offshore Steel Jacket Platforms in Network Environments