Active Control of a Flexible Rotor by an Active Bearing

1989 ◽  
pp. 367-380 ◽  
Author(s):  
Yoichi Kanemitsu ◽  
Masaru Ohsawa ◽  
Katsuhide Watanabe
Keyword(s):  
Active Control ◽  
Flexible Rotor

Active Control for Whirling Motion of Flexible Rotor

1991 ◽  
Vol 3 (4) ◽  
pp. 360-364 ◽  
Author(s):  
Takakazu Ishimatsu ◽  
◽  
Takashi Shimomachi ◽  
Nobuyoshi Taguchi ◽  
Keyword(s):  
Control System ◽  
Vibration Control ◽  
Active Control ◽  
Active Vibration Control ◽  
Digital Controller ◽  
Flexible Rotor ◽  
Whirling Motion ◽  
Active Vibration ◽  
Electromagnetic Damper

In a rotational machine, unbalance on the rotor is formidable since it causes resonance synchronized with the rotation of the rotor. In order to suppress this unfavorable vibration, we built an active vibration control system of flexible rotor using an electromagnetic damper. Our control system is composed of a digital controller to suppress the rotationally synchronized whirling motion and also a conventional analogue controller. Using our control system, whirling motion of the rotor under various rotating speeds was suppressed significantly.

Active Vibration Control of a Flexible Rotor on Flexibly-Mounted Journal Bearings

1981 ◽  
Vol 103 (4) ◽  
pp. 383-388 ◽  
Author(s):  
R. Stanway ◽  
C. R. Burrows
Keyword(s):  
Active Control ◽  
Active Vibration Control ◽  
Experimental Studies ◽  
Cost Effective ◽  
Journal Bearings ◽  
Flexible Rotor ◽  
System Integrity ◽  
Active Vibration ◽  
And Control ◽  
Effective Design

Some recent experimental studies have been concerned with the stabilization of rotating machinery through control action applied at critical points on the rotor. These studies have tended to ignore fundamental constraints on the positioning of active control inputs and measurement transducers. Such constraints must be considered to ensure both a cost effective design and system integrity in the event of component failure. This paper presents the first stage of a theoretical examination of active control by investigating a mathematical model of a three-mass flexible rotor symmetrically supported on flexibly mounted journal bearings. Three questions are posed: how many control sources are required, what measurement transducers are required and what information about the system dynamics is required in order to implement active control? The multivariable nature of the model and uncertainty about the oil-film dynamics makes general solutions to these problems difficult. However some solutions are proposed based upon the structural properties of the model. It is shown that the general requirements for system identification and control are conflicting. The practical implications of this conflict are discussed.

Performance Evaluation of Linear Oscillatory Actuator for Active Control Engine Mount

2012 ◽  
Vol 132 (12) ◽  
pp. 1091-1096 ◽  
Author(s):  
Fumiya Kitayama ◽  
Katsuhiro Hirata ◽  
Yasuyoshi Asai
Keyword(s):  
Performance Evaluation ◽  
Active Control ◽  
Engine Mount
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