Results 31 to 40 of about 5,289 (146)

Output-constrained individual pitch control methods using the multiblade coordinate transformation: trading off actuation effort and blade fatigue load reduction for wind turbines [PDF]

Wind Energy Science
Individual pitch control (IPC) has been thoroughly researched for its ability to reduce wind turbine blade and tower fatigue loads. Conventional IPC often uses the multiblade coordinate (MBC) transformation and aims for full attenuation of the ...
J. I. S. Hummel, J. Kober, S. P. Mulders
doaj   +1 more source

Blade root moment sensor failure detection based on multibeam LIDAR for fault-tolerant individual pitch control of wind turbines [PDF]

, 2014
Detection of blade root moment sensor failures is an important problem for fault-tolerant individual pitch control, which plays a key role in reduction of uneven blade loads of large wind turbines.
Ioannou P., Stotsky A., Taylor G.
core   +1 more source

Combined Pitch and Trailing Edge Flap Control for Load Mitigation of Wind Turbines

Energies, 2018
Using active control methods for load mitigation in wind turbines could greatly reduce the cost of per kilowatt hour of wind power. In this work, the combined pitch and trailing edge flap control (CPFC) for load mitigation of wind turbines is ...
Keshan He, Liangwen Qi, Liming Zheng, Yan Chen   +3 more
doaj   +1 more source

A multilevel neo-institutional analysis of infection prevention and control in English hospitals: coerced safety culture change? [PDF]

, 2019
Despite committed policy, regulative and professional efforts on healthcare safety, little is known about how such macro-interventions permeate organisations and shape culture over time.
Antonsen S., Aten K., Berger P.L., Birgand G., Boltanski L., Braithwaite J., Charani E., Charles K., Creswell J.W., Cullen W.D., Cunliffe A., Department of Health, Department of Health, Department of Health, Dixon‐Woods M., Dixon‐Woods M., Fiol C.M., Flin R., Francis R., Gioia D.A., Greenwood R., Halligan M., Harrison S.H., Hatch M.J., Herepath A., Howard‐Grenville J., Institute of Medicine (IOM), Kaufman J., Kyratsis Y., Leape L.L., Martin J., McCarthy D., Meyer J.W., Phillips N., Powell W.W., Reason J., Reay T., Reay T., Reay T., Reiman T., Schein E.H., Scott W.R., Seo M., Sexton J.B., Singer S.J., Smits M., Sorra J., Strauss A., Swidler A., Swidler A., Szymczak J.E., Templeton S.‐K., Thornton P.H., Vincent C., Walshe K., Waring J., Waring J.J., Weber K., Weick K.E., Weick K.E., Yin R.K., Zilber T.B.   +61 more
core   +1 more source

Wind turbine asymmetrical load reduction with pitch sensor fault compensation [PDF]

, 2020
Offshore wind turbines suffer from asymmetrical loading (blades, tower, etc), leading to enhanced structural fatigue. As well as asymmetrical loading different faults (pitch system faults etc.) can occur simultaneously, causing degradation of load ...
Liu, Yanhua, Patton, Ron J., Shi, Shuo
core   +1 more source

Articulated blade tip devices for load alleviation on wind turbines [PDF]

, 2016
This paper investigates the load alleviation capabilities of an articulated tip device, where the outermost portion of the blade can rotate with respect to the rest of the blade.
A. Croce, C. E. D. Riboldi, C. L. Bottasso, C. L. Bottasso, F. Gualdoni, P. Montinari   +5 more
core   +2 more sources

Combined wind turbine fatigue and ultimate load reduction by individual blade control [PDF]

, 2014
If each blade of the wind turbine has individual pitch actuator, there is possibility of employing the pitch system to mitigate structural loads through advanced control methods.
Han, Y, Leithead, W E
core   +1 more source

A Virtual Actuator for Advanced Individual Pitch Control (IPC)

Journal of Physics: Conference Series
Abstract We present a virtual actuator concept for wind turbine control, wherein rotor force and moment references from various controllers are optimally combined to compute individual blade pitch angles. The approach aims to minimize pitch bearing wear, too.
T. G. Hovgaard, F. Caponetti, J. D. Grunnet   +2 more
openaire   +1 more source

A CMOS 8×8 SPAD array for Time-of-Flight measurement and light-spot statistics [PDF]

, 2013
The design and simulation of a CMOS 8 × 8 single photon avalanche diode (SPAD) array is presented. The chip has been fabricated in a 0.18μm standard CMOS technology and implements a double functionality: measuring the Time-of-Flight with the help of a ...
Carmona Galán, Ricardo, Rodríguez Vázquez, Ángel Benito, Vornicu, Ion   +2 more
core   +1 more source

Actuator fault tolerant offshore wind turbine load mitigation control [PDF]

, 2023
Offshore wind turbine (OWT) rotors have large diameters with flexible blade structures which are subject to asymmetrical loads caused by blade flapping and turbulent or unsteady wind flow.
Liu, Yanhua, Patton, Ron J., Shi, Shuo
core   +2 more sources