Wavelet-based individual blade pitch control for vibration control of wind turbine blades

Fitzgerald, Breiffni; Staino, Andrea; Basu, Biswajit

doi:10.1002/stc.2284

Cited by 26 publications

(26 citation statements)

References 37 publications

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“…The linear system represents the dynamics of a wide range of smart structures that can be controlled by integrated force actuators. Apart from the typical examples of such structures, namely, bridges and slender buildings exposed to earthquake or wind forces, offshore platforms subjected to sea waves or wind turbine blades exposed to wind flow which are controlled by means of electric motors or active tuned mass systems, we can also see new emerging designs that employ piezoelectric actuators and shape memory alloys or polymer‐based artificial muscles . In the present paper, we will consider a modular cantilever beam equipped with a set of electromagnetic force actuators.…”

Section: Distributed Control Designmentioning

confidence: 99%

Scalable distributed optimal control of vibrating modular structures

Pisarski

Konowrocki

Jankowski

2020

Struct Control Health Monit

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Summary A scalable optimal control method for structural vibration mitigation is studied. The method relies on a structure's partitioning that leads to a set of dynamically interconnected subsystems. Each subsystem is operated with an individual subcontroller that collects the local state information and collaborates with the neighboring subcontrollers to estimate a short time prediction of the interconnecting forces defining the subsystem's boundary conditions. Using the extended model that represents the subsystem's dynamics together with the evolution of its boundary conditions, each subcontroller computes the control decision based on the solution to a finite‐time horizon optimal control problem. In order to cope with the changes in the boundary conditions, the optimal solution is computed repetitively according to the receding horizon scheme. The method is validated numerically for a cantilever structure equipped with actively controlled electromagnetic actuators and subjected to a variety of initial condition scenarios. The performance of the designed controller is tested by comparisons to the centralized and isolated decentralized controllers. The introduced system partitioning and distributed controller allow performing parallel computing which makes the method fully scalable and applicable to large‐scale structures. The computational complexity of the designed distributed control is studied for different settings in the modeling of the subsystem's boundary conditions.

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Section: Distributed Control Designmentioning

confidence: 99%

Scalable distributed optimal control of vibrating modular structures

Pisarski

Konowrocki

Jankowski

2020

Struct Control Health Monit

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“…The offshore wind turbine model developed is benchmarked against the state‐of‐the‐art wind turbine simulator FAST . FAST has been used in many previous studies on wind turbine dynamics and control and is verified and validated by DNV GL . The spar‐type offshore wind turbine defined in is used for analysis.…”

Section: Model Verificationmentioning

confidence: 99%

Vibration control of spar‐type floating offshore wind turbine towers using a tuned mass‐damper‐inerter

Sarkar

Fitzgerald

2019

Struct Control Health Monit

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116

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Summary This paper investigates the use of a passive tuned mass‐damper‐inerter (TMDI) for vibration control of spar‐type floating offshore wind turbine towers. The TMDI is a relatively new concept as a passive vibration control device. The configuration consists of an “inerter” attached to the tuned mass, parallel to the spring and damper of a classical tuned mass damper (TMD). The inerter provides a mass amplification effect on the classical TMD. The presence of the inerter virtually increases the mass of the damper leading to greater vibration control capabilities. This enables one to achieve improved vibration control using a lighter damper. Using a lightweight damper is particularly important for an offshore wind turbine because increasing mass on top of the tower can destabilize the overall system and increase tower vibrations, as demonstrated in this paper. The development of a passive TMDI for an offshore wind turbine tower has been proposed in detail in this work. Numerical simulations have been performed and results are presented demonstrating the impressive vibration control capabilities of this new device under various stochastic wind‐wave loads. It has been shown that the TMDI has considerable advantages over the classical TMD, achieving impressive response reductions with reductions in the stroke of the tuned mass. The TMDI has been shown to be a promising candidate for replacing the classical TMD for offshore wind applications.

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“…The controller was not developed to reduce structural loads. A wavelet-LQR based individual blade pitch controller was proposed in [16] capable of reducing aerodynamic loads on onshore wind turbines. But again, allowing for degradation in energy production.…”

Section: Introductionmentioning

confidence: 99%

“…The above review summaries some of the key individual pitch controllers proposed in literature that utilize innovative technology and/or complex control algorithms to optimize performance of wind turbines. It has been reported by many researchers that structural load reduction using individual pitch controllers can lead to degradation in output power quality and turbine regulation [14], [16]. The available literature on individual pitch controllers for floating offshore wind turbines (FOWTs) is rather sparse.…”

Section: Introductionmentioning

confidence: 99%

Individual Blade Pitch Control of Floating Offshore Wind Turbines for Load Mitigation and Power Regulation

Sarkar

Fitzgerald

Basu

2021

IEEE Trans. Contr. Syst. Technol.

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This paper proposes a new strategy for individual blade pitch control to regulate power production while simultaneously alleviating structural loads on spar-type floating offshore wind turbines. Individual blade pitch control types of algorithms for offshore wind turbines are sparse in the literature though there are expected benefits from experience on such types of controllers for onshore wind turbines. Wind turbine blade pitch actuators are primarily used to maintain rated power production at above-rated wind speeds and therefore, control algorithms are usually developed only to regulate power production. The scope of reducing structural loads using individual pitch control has been proved to be very promising over the last decade and numerous individual pitch control algorithms have been proposed by researchers. However, reduction in structural loads often results in a degradation in power production and regulation. Furthermore, improving power regulation often has a detrimental effect on the floating platform motion. In this paper, a new control strategy is proposed to achieve the two competing objectives. The proposed controller combines a low authority Linear Quadratic (LQ) controller with an integral action to reduce the 1P (once per revolution) aerodynamic loads while regulating power production using the same pitch actuators that are traditionally used only to optimize power production. The proposed controller is compared against the baseline controller used by state-of-the-art wind turbine simulator FAST using a high fidelity aeroelastic offshore wind turbine model. Numerical results show that the proposed controller offers improved performance in optimizing power production and reducing wind turbine and platform loads compared to the baseline controller over an envelope of windwave loading environment.Index Terms-Floating offshore wind turbines, individual blade pitch control, regulate power production, alleviate aerodynamic loads.

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Wavelet-based individual blade pitch control for vibration control of wind turbine blades

Cited by 26 publications

References 37 publications

Scalable distributed optimal control of vibrating modular structures

Scalable distributed optimal control of vibrating modular structures

Vibration control of spar‐type floating offshore wind turbine towers using a tuned mass‐damper‐inerter

Individual Blade Pitch Control of Floating Offshore Wind Turbines for Load Mitigation and Power Regulation

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