Results 1 to 10 of about 13,672 (265)

Dynamic Behavior Analysis of the Winding Rotor with Structural Coupling and Time-Frequency Varying Parameters: Simulation and Measurement

Applied Sciences, 2021
To satisfy the requirements of high speed, large capacity and constant winding, a textile winding rotor needs to work in a wide rotation speed range and frequently pass through critical speed points. Thus, the winding rotor adopts the flexible long shaft
Xunxun Ma, Shujia Li, Wangliang Tian, Xiqiang Qu, Shengze Wang, Yongxing Wang   +5 more
doaj   +1 more source

Fracture fault analysis of tail rotor on a helicopter

Hangkong gongcheng jinzhan, 2023
Finding out the reason of the fracture fault of tail rotor on a helicopter is of practical significance for using and maintaining the helicopter and is of significant reference for improving safety of new type helicopter. The fracture fault of tail rotor
HOU Bo, XU Guanfeng, YAN Huijuan, CHU Xiaoyang   +3 more
doaj   +1 more source

Critical Vibration and Control of the Maglev High-Speed Motor Based on μ–Synthesis Control

Sensors, 2022
The Maglev motor has the characteristics of high-speed and high-power density, and is widely used in compressors, molecular pumps and other high-speed rotating machinery.
Yefa Hu, Kezhen Yang, Huachun Wu, Xinhua Guo, Nianxian Wang   +4 more
doaj   +1 more source

Experimental Study of a Flexible Rotor and its Dependency on the Rolling-Bearing Temperature

International Journal of Rotating Machinery, 2006
An experimental study of the effects of the bearing temperature on rotor unbalance responses and on the first forward and backward critical speeds is presented.
Jean-Jacques Sinou, Fabrice Thouverez
doaj   +2 more sources

Experimental Study of Piezoelectric Control for Changing Tilting Pad Journal Bearing Circumferential Angle and Radial Displacement

Lubricants, 2023
In order to improve the vibration performance of the oil-lubricated tilting pad bearing system, an experimental approach using a piezoelectric actuator to control two new flexible tilting pads is proposed.
Shuxia Peng, Xin Qin, Xiaojing Wang, Guangyao Huang, Xin Xiong   +4 more
doaj   +1 more source

Model-based initial residual unbalance identification for rotating machines in one and two planes using an iterative inverse approach [PDF]

Bulletin of the Polish Academy of Sciences: Technical Sciences, 2021
To achieve acceptable dynamical behavior for large rotating machines operating at subcritical speeds, the balancing quality check at the planned service speed in the installation location is often demanded for machines such as turbo-generators or high ...
Satish Bastakoti, Tuhin Choudhury, Risto Viitala, Emil Kurvinen, Jussi Sopanen   +4 more
doaj   +1 more source

Dynamic Characteristics of a Misaligned Rigid Rotor System with Flexible Supports

Shock and Vibration, 2021
A misaligned rigid rotor system with flexible supports differing from the traditional flexible rotor system, which refers to its practical rotating center line determined by supports offset from the theoretical one, often suffers support structure damage
Meiling Wang, Baogang Wen, Qingkai Han, Yibo Sun, Changxin Yu   +4 more
doaj   +1 more source

Adaptive Rejection of a Sinusoidal Disturbance with Unknown Frequency in a Flexible Rotor with Lubricated Journal Bearings

Mathematics, 2022
Frequency-dependent adaptive noise cancellation-based tracking controller (ANC-TC) is a known technique for the stabilization of several nonlinear dynamical systems.
Gerardo Amato, Roberto D’Amato, Alessandro Ruggiero   +2 more
doaj   +1 more source

STUDY ON DYNAMIC BALANCE OF AEROENGINE FLEXIBLE ROTOR BASED ON TRANSFER FUNCTION

Jixie qiangdu, 2021
The influence coefficient method and transfer function method are applied to the dynamic balance of aero-engine flexible rotor. The static transfer function of the flexible rotor is obtained by hammering on the experimental bench of the aero-engine ...
ZHANG Ying, WANG KunPeng, MA Liang
doaj  

Active vibration control of the flexible high-speed rotor with magnetic bearings via phase compensation to pass critical speed

Journal of Low Frequency Noise, Vibration and Active Control, 2019
In modern industries, high-speed motors and generators have received great attention, and they are widely used in micro turbine, centrifugal compressor, blower, etc.
Shaolin Ran, Yefa Hu, Huachun Wu, Xin Cheng   +3 more
doaj   +1 more source