Vibration reduction of a non-linear ship model using positive position feedback controllers

YA Amer, AT El-Sayed, EE Ahmed - International Journal of Dynamics and …, 2022 - Springer
In this paper, a four-degree-of-freedom (4-DOF) of coupled pitch-roll ship model including
two positive position feedback controllers (PPF) are considered appropriate to reduce the …

Integral sliding mode control for maximum power point tracking in DFIG based floating offshore wind turbine and power to gas

L Pan, Z Zhu, Y Xiong, J Shao - Processes, 2021 - mdpi.com
This paper proposes a current decoupling controller for a Doubly-fed Induction Generator
(DFIG) based on floating offshore wind turbine and power to gas. The proposed controller …

[HTML][HTML] Nonlinear modified positive position feedback control of cantilever beam system carrying an intermediate lumped mass

YS Hamed, A El Shehry, M Sayed - Alexandria Engineering Journal, 2020 - Elsevier
In this paper, we investigated the nonlinear oscillations, stability and resonance of a
cantilever beam system which carrying an intermediate lumped mass. The response of …

Parametric Resonance in Wave Energy Converters and Offshore Wind Turbines: A review

J Davidson, JCC Henriques, R Galeazzi… - Available at SSRN …, 2024 - papers.ssrn.com
This review considers the dynamic phenomenon of parametric resonance (PR) within
marine renewable energy, specifically in wave systems and offshore wind. It consolidates …

A proportional derivative (PD) controller for suppression the vibrations of a contact-mode AFM model

YS Hamed, KM Albogamy, M Sayed - IEEE Access, 2020 - ieeexplore.ieee.org
The nonlinear dynamics control of a contact-mode atomic force microscopy (AFM) system
with multi forces (harmonic and parametric excitation force) utilizing the time delay …

Studying the Settlement of OWT Monopile Foundations Using a TZ Spring with the Torsional Effect

SH Ju, CS Chiu, HH Hsu - Processes, 2023 - mdpi.com
The main purpose of this paper was to study the vertical settlement of offshore wind turbine
(OWT) monopile support structures, where 5, 10, 15, and 20 MW OWT support structures …

Analysis of the sieve unit inclination angle in the cleaning process of oat grain in a rotary cleaning device

Z Krzysiak, W Samociuk, J Zarajczyk, Z Kaliniewicz… - Processes, 2020 - mdpi.com
The article presents some of the research on the wider work related to testing and improving
a new rotary cleaning device. The new cereal grain cleaning and separation device can …

Nonlinear vibrations analysis and dynamic responses of a vertical conveyor system controlled by a proportional derivative controller

YS Hamed, H Alotaibi, ER El-Zahar - IEEE Access, 2020 - ieeexplore.ieee.org
In this paper, we introduce a nonlinear vibrations analysis and dynamic responses of a
vertical conveyor system under multi excitation forces. By adding the nonlinear proportional …

Fatigue life analysis of offshore wind turbine tower under combined action of wind and wave

Y Xie, B Dai, Z Huang - Journal of Physics: Conference Series, 2023 - iopscience.iop.org
In order to obtain the fatigue life of an 8 MW offshore wind turbine tower, the fatigue damage
characteristics of tower under combined action of wind and wave were analyzed. The …

Utilizing nonlinear active vibration control to quench the nonlinear vibrations of helicopter blade flapping system

YS Hamed, HK Alkhathami, ER El-Zahar - IEEE Access, 2020 - ieeexplore.ieee.org
This article utilizes a nonlinear active vibration control to eliminate the helicopter blade
flapping system oscillations having mixed excitation forces. The approximate solutions were …