Development of a Structural Control and Power Generation Device Employing an Inerter Mechanism for Floating Offshore Wind Turbines

YOSHIMIZU, Kenji; Sato, Takahiro; Ichimonji, Masayuki; Watanabe, Urara; Taniyama, Yoshihiro; Nemoto, Yudai; ASAI, Takehiko

doi:10.1299/jsmedmc.2021.213

Cited by 1 publication

(2 citation statements)

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“…In this paper, a torque simulator was employed to simulate the resistive torque from the generator. The resistive torque was assumed to be the first order of the rotational angular speed θ  and is expressed in (19). Here, g R is the generator's coefficient which is manipulated to adjust the resistive torque from the generator.…”

Section: Generator Modelmentioning

confidence: 99%

“…Moreover, a control stiffness mechanism was proposed in [17], and an optimum control strategy was applied in [18] to investigate the performance of the proposed design under the modeling program. A WEC is composed of a floating buoy and an upper structure placed over the floating buoy connected by a spring and a ball screw with a rotational mass, which converted linear motion to rotational motion, and the ball screw is connected to a rotating generator [19]. Moreover, some important approaches in modeling WEC in the frequency and time domains were presented in [20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

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Experimental Investigation of a Point Absorber Wave Energy Converter Using an Inertia Adjusting Mechanism

Phan,

Ahn

2024

Applied Sciences

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This study proposes a novel point absorber wave energy converter (WEC) utilizing an inertial adjusting mechanism for performance evaluation. A conceptual design is introduced to explain the WEC’s functionality. Adjustable masses are incorporated to tune the natural frequency of the power take-off (PTO) system, matching the excitation frequencies of incoming waves. To analyze the system’s behavior, a coupled mechanical and hydrodynamic time domain simulation is presented. This simulation, built primarily in MATLAB/Simulink, focuses on a truncated floating buoy connected to a bidirectional gearbox. Since the WEC operates under various wave conditions, hydrodynamic parameters are determined and simulated in the frequency domain using ANSYS AQWA wave interaction software (version number 2021R1). Finally, a prototype is constructed and tested in a wave tank. Test results under different wave conditions are presented and compared to assess the proposed WEC’s performance.

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Section: Generator Modelmentioning

confidence: 99%