Results 181 to 190 of about 1,764,784 (231)
Some of the next articles are maybe not open access.
Speed regulation of an eccentric rotor with a flexible joint
Proceedings of the 2004 IEEE International Conference on Control Applications, 2004., 2005This article explores the problem of speed regulation of an unbalanced rotor in gravitational field with a flexible shaft. This problem falls into the category of vibration control of flexible structures subject to nondecaying harmonic disturbances. The experimental device is an eccentric rotor driven by a dc servomotor through a flexible joint. As the
Shang-Teh Wu, Wei-Ming Shen
openaire +1 more source
Monitoring Of The Rotor Speed And Rotor Angle
1992Abstract Tachometers can be used for monitoring the angular speed of a shaft. For this purpose it is possible to use a d.c. tachometer which can be a separately excited d.c. machine. When the separately excited d.c. machine operates as a generator, and if the field current is constant, under certain assumptions its armature voltage is
openaire +1 more source
Estimation of Rotor Effective Wind Speed: A Comparison
IEEE Transactions on Control Systems Technology, 2013Modern wind turbine controllers use wind speed information to improve power production and reduce loads on the turbine components. The turbine top wind speed measurement is unfortunately imprecise and not a good representative of the rotor effective wind speed.
Mohsen Nourbakhsh Soltani +6 more
openaire +3 more sources
Shock In Rotor Blades During Speed Changes
Journal of Sound and Vibration, 1994Abstract The influence of changes in rotational speed on the dynamics of rotating blades is investigated. The governing non-linear integro-partial differential equations, for uniform rates of acceleration, derived in an earlier paper are presented.
Vyas, N. S., Rao, J. S.
openaire +1 more source
Speed regulation of induction motors with wound rotor
IFAC Proceedings Volumes, 2013Abstract The regulation of speed is required in many applications of induction motors, including in electric locomotives and electric driving vehicles. In this paper the speed control problem for a wound rotor induction motor is considered. The speed is controlled by changing the external resistance in the rotor circuit.
Elena Solovyeva +2 more
openaire +2 more sources
Rotor State Feedback Control for Rotorcraft with Variable Rotor Speed
AIAA Guidance, Navigation, and Control Conference, 2009The impacts of variable rotor speed on closed loop stability of rotorcraft are discussed. In previous work a model following controller was designed to provide high bandwidth control of a utility helicopter while providing improved performance using variable rotor speed.
Wei Guo, Joseph Horn
openaire +1 more source
Rotor Materials for Medium-Speed Solid-Rotor Induction MotorS
2007 IEEE International Electric Machines & Drives Conference, 2007The effects of different solid-rotor materials on the motor performance are studied. The performance characteristics of a 180 kW medium-speed induction motor with solid rotor are analyzed using two-dimensional finite element method. A set of fictitious and realistic ferromagnetic materials, the mechanical properties of which satisfy the requirements of
T. Aho, V. Sihvo, J. Nerg, J. Pyrhonen
openaire +1 more source
On Fixed-Speed WT Generator Modeling for Rotor Speed Stability Studies
IEEE Transactions on Power Systems, 2012This paper analyzes fixed-speed induction generator modeling oriented to rotor speed stability studies. The single- and double-cage models are compared. The effects of symmetrical voltage sags on generator behavior are studied in detail. The rotor speed stability of the turbine is also examined and rotor speed recovery time is proposed as an indicator ...
Pedra Durán, Joaquim +4 more
openaire +3 more sources
Instrumentation enhancement for digital rotor-angle and rotor-speed transducers
Mechatronics, 1991Abstract Rotor position and speed are significant variables in numerous industrial control systems and encoder-type transducers are commercially available. However, basic mechanical and electrical designs do not usually lend them to useful real-time small-signal applications.
S.K. Tso, P.T. Ho
openaire +1 more source
A Scalable, High-Speed Optical Rotor Switch
Optical Fiber Communication Conference (OFC) 2024Rotary optical switching enables low-loss microsecond-scale reconfiguration between pre-programmed interconnects with thousands of ports, supporting high-bandwidth and low-latency Rotornet datacenter architectures. We describe a 7 µs 128 × 128 port rotor switch with 4 dB fiber-to-fiber insertion loss and a 1-dB spectral bandwidth of 120 nm.
William M. Mellette +5 more
openaire +2 more sources