Smart Structures and Systems

  • 제18권1호
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  • Pages.75-92
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  • 2016
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  • 1738-1584(pISSN)
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  • 1738-1991(eISSN)
테크노프레스 (Techno-Press)
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Design and calibration of a semi-active control logic to mitigate structural vibrations in wind turbines

  • Caterino, Nicola (Department of Civil Engineering, University of Naples "Parthenope") ;
  • Georgakis, Christos T. (Department of Civil Engineering, Technical University of Denmark (DTU)) ;
  • Spizzuoco, Mariacristina (Department of Structures for Engineering and Architecture, University of Naples Federico II) ;
  • Occhiuzzi, Antonio (Department of Civil Engineering, University of Naples "Parthenope")
  • 투고 : 2015.09.26
  • 심사 : 2016.05.06
  • 발행 : 2016.07.25
⟨ 이전 논문 다음 논문 ⟩

초록

The design of a semi-active (SA) control system addressed to mitigate wind induced structural demand to high wind turbine towers is discussed herein. Actually, the remarkable growth in height of wind turbines in the last decades, for a higher production of electricity, makes this issue pressing than ever. The main objective is limiting bending moment demand by relaxing the base restraint, without increasing the top displacement, so reducing the incidence of harmful "p-delta" effects. A variable restraint at the base, able to modify in real time its mechanical properties according to the instantaneous response of the tower, is proposed. It is made of a smooth hinge with additional elastic stiffness and variable damping respectively given by springs and SA magnetorheological (MR) dampers installed in parallel. The idea has been physically realized at the Denmark Technical University where a 1/20 scale model of a real, one hundred meters tall wind turbine has been assumed as case study for shaking table tests. A special control algorithm has been purposely designed to drive MR dampers. Starting from the results of preliminary laboratory tests, a finite element model of such structure has been calibrated so as to develop several numerical simulations addressed to calibrate the controller, i.e., to achieve as much as possible different, even conflicting, structural goals. The results are definitely encouraging, since the best configuration of the controller leaded to about 80% of reduction of base stress, as well as to about 30% of reduction of top displacement in respect to the fixed base case.

키워드

참고문헌

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피인용 문헌

  1. Semi-Active Control of Precast RC Columns under Seismic Action vol.245, 2017, https://doi.org/10.1088/1757-899X/245/2/022039
  2. Structural Control of a Wind Turbine Accounting for Second Order Effects vol.245, 2017, https://doi.org/10.1088/1757-899X/245/2/022040
  3. Variable Dampers to Mitigate Structural Demand to Wind Turbines: The Role of the Monitoring System Features for the Effectiveness of the Control Strategy vol.10, pp.7, 2016, https://doi.org/10.3390/app10072498
  4. Comparison of semi-active and passive tuned mass damper systems for vibration control of a wind turbine vol.30, pp.6, 2016, https://doi.org/10.12989/was.2020.30.6.663
  5. Hybrid vibration control of offshore wind turbines under multiple external excitations vol.12, pp.4, 2016, https://doi.org/10.1063/5.0003394