Results 281 to 290 of about 285,442 (311)
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Forward Flight & MTE Simulation of a UAM-Scale Quadcopter with Hybrid RPM & Pitch Control
Proceedings of the Vertical Flight Society 79th Annual Forum, 2023The handling qualities of a 1200-lb gross weight, UAM-scale quadcopter with both variable rotor speed and collective pitch control are examined in simulation. With these redundant controls, the forward flight trim space is analyzed and three trim modes
Ariel Walter +3 more
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Pitch Control of Large Wind Turbines During the Shutdown Operation
Conference on Control Technology and Applications, 2023In this contribution, the control for the shutdown operation of a very large wind turbine is studied. The control scheme uses the standard control infrastructure, which is available in the machine, but the control system is reconfigured according to the ...
A. Gambier
semanticscholar +1 more source
Collective pitch sliding mode control for large scale wind turbines considering load reduction
2014 International Conference on Mechatronics and Control (ICMC), 2014Flexibility of blade, transmission system and tower observably increase with the development of wind turbines toward to large scale and light weight. Loads suffered by generating set during operational process become increasingly complex. Some control methods can be employed to reduce these loads so as to prolong life span of generating set.
Yaozhen Han, Xiangjie Liu
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2015 15th International Conference on Control, Automation and Systems (ICCAS), 2015
Floating offshore wind turbines have attracted interest in recent years. In floating offshore wind turbines, generator output fluctuation and platform motions are caused by the variation of wind and waves. In this paper, a PI control in collective blade pitch control is used to suppress the fluctuation and motions, and PI controller gains are tuned by ...
Koki Kakita, Naoyuki Hara, Keiji Konishi
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Floating offshore wind turbines have attracted interest in recent years. In floating offshore wind turbines, generator output fluctuation and platform motions are caused by the variation of wind and waves. In this paper, a PI control in collective blade pitch control is used to suppress the fluctuation and motions, and PI controller gains are tuned by ...
Koki Kakita, Naoyuki Hara, Keiji Konishi
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Renewable Energy, 2020
Abstract The aerodynamic power captured by wind turbines is generally limited by pitch control when it operates above rated wind speed. However, problems such as actuator constraints, unmeasured system states, and stochastic wind speed fluctuations, make it difficult to establish an accurate model of the controlled collective pitch system. This paper
Jianshen Li, Shuangxin Wang, Yaguang Li
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Abstract The aerodynamic power captured by wind turbines is generally limited by pitch control when it operates above rated wind speed. However, problems such as actuator constraints, unmeasured system states, and stochastic wind speed fluctuations, make it difficult to establish an accurate model of the controlled collective pitch system. This paper
Jianshen Li, Shuangxin Wang, Yaguang Li
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A Comparison of Individual and Collective Pitch Model Predictive Controllers for Wind Turbines
2018 Annual American Control Conference (ACC), 2018Model predictive control (MPC) has been gaining attention in the wind energy field for its ability to optimize performance while taking into account constraints and preview disturbance measurements such as those that can be provided by lidar scanners. While a growing body of research exists showing the benefits of MPC over baseline controllers, little ...
Michael N. Sinner, Lucy Y. Pao
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Fault-Tolerant Individual Pitch Control for Load Mitigation in Wind Turbines With Actuator Faults
IEEE transactions on industrial electronics (1982. Print), 2021The sizes of wind turbines have been steadily increasing over the past decade, especially on offshore sites. The greater structural flexibility of such machines necessitates the development of reliable load mitigation techniques to alleviate the effects ...
H. Badihi +3 more
semanticscholar +1 more source
Renewable Energy, 2019
Abstract Collective pitch control is the main tool used to regulate the speed and power of wind turbines while operating above their rated wind speeds. The main challenges that face collective pitch control designs are the constraints on the control actions, the unmodeled uncertainties, and the unmeasured system states.
Ahmed Lasheen +3 more
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Abstract Collective pitch control is the main tool used to regulate the speed and power of wind turbines while operating above their rated wind speeds. The main challenges that face collective pitch control designs are the constraints on the control actions, the unmodeled uncertainties, and the unmeasured system states.
Ahmed Lasheen +3 more
openaire +1 more source
Energy, 2017
Abstract This paper introduces an extension to continuous time model predictive control to take care of time varying systems by adopting a tube-based approach. The proposed controller can be formulated as a multi-parametric quadratic program that can be solved offline. Therefore, the computational time is reduced.
Ahmed Lasheen +3 more
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Abstract This paper introduces an extension to continuous time model predictive control to take care of time varying systems by adopting a tube-based approach. The proposed controller can be formulated as a multi-parametric quadratic program that can be solved offline. Therefore, the computational time is reduced.
Ahmed Lasheen +3 more
openaire +1 more source
Analysis of Collective and Enhanced Individual Pitch Control Strategies for Wind Turbines
2026 IEEE 23rd Mediterranean Electrotechnical Conference (MELECON)In the nominal operating region of wind turbines, collective pitch control (CPC) regulates power by maintaining rated rotor speed, while individual pitch control (IPC) mitigates cyclic blade loads caused by wind variations like wind shear or turbulence ...
M. Lara +5 more
semanticscholar +1 more source