Results 271 to 280 of about 285,442 (311)
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Proceedings of the Vertical Flight Society 78th Annual Forum, 2022
Hover trim and dynamic analyses were performed on a UAM-scale quadcopter with both variable rotor speed and variable collective blade pitch. The bare-airframe dynamics were first considered at three different hover trim points, where power consumption is increased to improve authority. The control and stability derivatives were examined at each
Ariel Walter +4 more
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Hover trim and dynamic analyses were performed on a UAM-scale quadcopter with both variable rotor speed and variable collective blade pitch. The bare-airframe dynamics were first considered at three different hover trim points, where power consumption is increased to improve authority. The control and stability derivatives were examined at each
Ariel Walter +4 more
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An amplitude- and rate-saturated collective pitch controller for wind turbine systems
Renewable Energy, 2020Abstract This paper proposes a new collective pitch controller for wind turbine systems to maintain the generator speed constant at the rated value in the region above the rated wind speed. It provides the command of the collective pitch angle to the wind turbine system, and one can impose explicit limits on the magnitude and the rate-of-change of ...
Nehal Baiomy, Ryo Kikuuwe
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2015 IEEE International Conference on Mechatronics and Automation (ICMA), 2015
In order to improve the self-starting capacity of straight-bladed vertical axis wind turbine (SB-VAWT), a prototype with collective pitch control (CPC) was developed. The pitch angle of each blade was adjusted by a blade pitch control mechanism, consisting of four driving wheels attached to the blades and one servo motor, and motion of each blade was ...
Lixun Zhang +6 more
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In order to improve the self-starting capacity of straight-bladed vertical axis wind turbine (SB-VAWT), a prototype with collective pitch control (CPC) was developed. The pitch angle of each blade was adjusted by a blade pitch control mechanism, consisting of four driving wheels attached to the blades and one servo motor, and motion of each blade was ...
Lixun Zhang +6 more
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Fuzzy predictive control of the collective pitch in large wind turbines
2015 European Control Conference (ECC), 2015This paper proposes a new design of a fuzzy predictive controller for collective pitching of large wind turbines. Collective pitch controllers operate in region three to harvest the rated power and maintain the rated speed. The wind turbine model is represented by a Takagi-Sugeno (T-S) fuzzy model.
Ahmed Lasheen, Abdel Latif Elshafei
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Research on Application of Fuzzy PID in Collective Pitch Control System
2011 International Conference on Control, Automation and Systems Engineering (CASE), 2011Based on the domestic megawatt wind turbine generator system, the pitch control techniques for large scale wind turbine are deeply analyzed in this thesis. Launching on the basic theory of wind turbine blade aerodynamics, the essential regulations of pitch control are deduced.
X. Gang
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2016 American Control Conference (ACC), 2016
Wind being the primary energy resource has a huge influence on the dynamic behavior of wind turbines. Therefore, the control algorithms can be further improved if the wind speed is known by the controller. Unfortunately, either no accurate direct online measurement of the effective wind speed is available or the measurement system is too expensive ...
null Fanzhong Meng +2 more
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Wind being the primary energy resource has a huge influence on the dynamic behavior of wind turbines. Therefore, the control algorithms can be further improved if the wind speed is known by the controller. Unfortunately, either no accurate direct online measurement of the effective wind speed is available or the measurement system is too expensive ...
null Fanzhong Meng +2 more
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2025 IEEE Conference on Control Technology and Applications (CCTA)
As Floating Offshore Wind Turbines (FOWTs) take on a growing share in global renewable energy generation, they will eventuallyj be required to support the grid through ancillary services.
Muhammad Sharjil, Muhammad Faisal Aftab
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As Floating Offshore Wind Turbines (FOWTs) take on a growing share in global renewable energy generation, they will eventuallyj be required to support the grid through ancillary services.
Muhammad Sharjil, Muhammad Faisal Aftab
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Proceedings of the Vertical Flight Society 80th Annual Forum
A real-time capable simulation model is developed for a 1200 lb quadcopter with hybrid variable-RPM and collective pitch control. Linear models and trim points are calculated using the Rensselaer Multicopter Analysis Code (RMAC), and controllers are designed to meet flying qualities specifications in hover and forward flight. Four control modes
Tom Berger +3 more
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A real-time capable simulation model is developed for a 1200 lb quadcopter with hybrid variable-RPM and collective pitch control. Linear models and trim points are calculated using the Rensselaer Multicopter Analysis Code (RMAC), and controllers are designed to meet flying qualities specifications in hover and forward flight. Four control modes
Tom Berger +3 more
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Design and Flight Testing of a Multirotor Vehicle with Cyclic-Collective Pitch Control
AIAA Scitech 2021 Forum, 2021Colin A. Sledge +2 more
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Renewable Energy, 2015
Abstract As the capacity of wind turbines has increased, the loads on crucial components such as a gearbox, a generator, and blades are significantly increasing. An intelligent online monitoring system is indispensable to protect the excessive load on core components and manage a wind farm efficiently.
Ki-Yong Oh +3 more
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Abstract As the capacity of wind turbines has increased, the loads on crucial components such as a gearbox, a generator, and blades are significantly increasing. An intelligent online monitoring system is indispensable to protect the excessive load on core components and manage a wind farm efficiently.
Ki-Yong Oh +3 more
openaire +3 more sources