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Updated: Jun 17, 2025

Simulation of Human-induced Vibrations Based on the Characterized In-field Pedestrian Behavior
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Controlling wind turbine tower vibration under external force by applying control systems combination.

Y A Amer1, A T El-Sayed2, M M Agwa3

  • 1Department of Mathematics, Faculty of Science, Zagazig University, Zagazig, Egypt.

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|August 10, 2024
PubMed
Summary

This study introduces a combined cubic negative velocity control (CNVC) and linear negative acceleration control (LNAC) technique to reduce wind turbine tower (WTT) vibrations. This cost-effective method enhances WTT performance and lifespan by mitigating fatigue caused by excessive vibrations.

Keywords:
Approximate solutionAveraging techniqueCubic negative velocity controlLinear negative acceleration controllerWind turbine tower

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Area of Science:

  • Engineering
  • Renewable Energy Systems
  • Vibration Control

Background:

  • Wind energy is a critical component of global energy production, shifting focus from traditional fuel sources.
  • Vibrations in wind turbine towers (WTTs) negatively impact performance, reduce service life, and cause fatigue, necessitating effective control strategies.
  • Existing research highlights the need for cost-efficient solutions to manage WTT structural integrity.

Purpose of the Study:

  • To investigate and identify the most effective and cost-efficient vibration damping technique for wind turbine towers.
  • To evaluate the performance of a novel combined control strategy for mitigating WTT vibrations.
  • To analyze the impact of external forces on the nonlinear dynamic system of WTTs.

Main Methods:

  • Numerical tests were conducted on various controlled systems to assess vibration damping effectiveness.
  • A new technique combining cubic negative velocity control (CNVC) and linear negative acceleration control (LNAC) was developed using an approximation method for the averaging technique.
  • The system's two-degree-of-freedom (2-DOF) differential coupled equations were analyzed under external forces.
  • Numerical analysis of vibration values, stability, frequency response, and time history (using RK-4) was performed before and after control implementation.

Main Results:

  • The combined CNVC and LNAC technique proved to be the most effective and cost-efficient solution for vibration damping in WTTs.
  • Numerical simulations confirmed the efficacy of the proposed control strategy in reducing vibrations.
  • The study validated numerical and approximate solutions against frequency response equations and time history analyses.

Conclusions:

  • The integrated CNVC and LNAC control strategy offers a promising solution for enhancing WTT performance and extending their operational lifespan.
  • This research provides a cost-effective approach to mitigate fatigue and improve the reliability of wind turbine structures.
  • Further investigation into parameter effects and comparison with existing studies underscore the significance of this vibration control method.