Results 221 to 230 of about 13,672 (265)

Magnetic Bearing Sizing for Flexible Rotors

Journal of Tribology, 1992
Magnetic bearing load capacity in flexible rotor systems must be adequate to accommodate external loads acting on the rotor. The first part of this paper develops the theoretical basis for computing the bearing load capacity requirements of flexible rotors subject to bounded external harmonic loads and strict motion constraints. The second part of this
E. H. Maslen, P. E. Allaire
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Vibration control algorithms for flexible rotors

Journal of Sound and Vibration, 1992
A general vibration control method for flexible rotors with unknown and/or slowly varying parameters is presented. A digital controller has a built-in filter. This allows the rotor model to be reduced to several controlled vibration modes. Unmeasured second order derivatives are eliminated during parameterization of the rotor model. A modified weighted
Janecki, D., Gosiewski, Z.
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Helicopter Rotor with Flexible Hub

SAE Technical Paper Series, 1965
<div class="htmlview paragraph">The paper discusses an improved control system for a helicopter or VTOL aircraft equipped with a rigid lift rotor integral with a flexible hub.</div> <div class="htmlview paragraph">The proposed method consists in suitably arranging the knuckle joints on the ends of the blade pitch control levers to ...
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Flexible rotor balancing techniques

2020
ABSTRACT FLEXIBLE ROTOR BALANCİNG TECHNIO.UES SARDAĞI, Yalçın M.S. in Mechanical Engineering Supervisor: Prof. Dr. Güven AKSU Co-supervisor: Prof. Dr. Nevzat ÖZGÜVEN February, 1994, 104 pages. To compute final correction masses for unbalanced rotating machinery several balancing techniques have been developed.
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Magnetic Bearings and Flexible Rotor Dynamics

Tribology Transactions, 1989
The mechanics of an active magnetic bearing (AMB) is explained by presenting a practical AMB control scheme. The scheme comprises three parallel feedback loops to achieve dynamic stiffness, static stiffness and damping. These AMB properties are presented for rotor/bearing designers in closed-form functions of exciting frequency and several ...
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Boundary control of a two‐dimensional flexible rotor

International Journal of Adaptive Control and Signal Processing, 2001
AbstractIn this paper, we present the design of boundary controllers for a two‐dimensional, spinning flexible rotor system. Specifically, we develop a model‐based boundary controller which exponentially regulates the rotor's displacement and the angular velocity tracking error, and an adaptive boundary controller which asymptotically achieves the same ...
Nagarkatti, S. P., Dawson, D. M., de Queiroz, M. S., Zhang, F., Costic, B.   +4 more
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Balancing of Flexible Rotors during Operation

Journal of Mechanical Engineering Science, 1981
Previous theoretical and experimental work on balancing rotating systems without interrupting operation is extended to multi-disc flexible shaft systems with two balancing planes.
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Équilibrage des rotors rigides et flexibles

Fonctions et composants mécaniques, 1997
Il est connu qu’une piece « qui ne tourne pas rond » genere des efforts tournants dus aux balourds installes d’autant plus eleves que la vitesse de rotation augmente : Force centrifuge (N) = Masse (kg) · Rayon (m) · Vitesse de rotation 2  (rad/s) Des vibrations de la machine en resultent, sous l’effet des forces developpees par les paliers pour ...
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Flexible self-charging power sources

Nature Reviews Materials, 2022
Ruiyuan Liu, Zhong Lin Wang, Kenjiro Fukuda   +2 more
exaly  

Balancing flexible rotors

2023
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