scholarly journals Active Vibration Control of Rotor-Bearing Systems

10.5772/10148 ◽  
2010 ◽  
Author(s):  
Andres Blanco-Ortega ◽  
Gerardo Silva-Navaro ◽  
Francisco Beltran-Carbajal ◽  
Luis Gerardo
Keyword(s):  
Vibration Control ◽  
Active Vibration Control ◽  
Rotor Bearing ◽  
Active Vibration

scholarly journals Active vibration control of a rotor-bearing-actuator system using robust eigenvalue placement method

2020 ◽  
Vol 53 (3-4) ◽  
pp. 531-540
Author(s):  
Tao Lai ◽  
Junfeng Liu
Keyword(s):  
Vibration Control ◽  
Condition Number ◽  
Active Vibration Control ◽  
State Equation ◽  
Control Technique ◽  
Precise Position ◽  
Placement Method ◽  
Rotor Bearing ◽  
Actuator System ◽  
Active Vibration

In order to improve the vibration responses of rotor system, this paper presents an active vibration control technique for a rotor-bearing-actuator system with the use of robust eigenvalue placement method. By analyzing the characteristics of the piezoelectric stack actuator, bearing and rotor, a rotor-bearing-actuator system is modeled. Based on this dynamical model, a reduced-order technique is used to establish the state equation in the modal space. A robust eigenvalue placement method, which can enhance the robustness of system to model error and uncertain factors by optimizing the close-loop eigenmatrix with a small condition number, is proposed to carry out the active vibration control for system. The good results indicate that the eigenvalue can be placed to precise position, and the displacement responses get effectively suppressed with the proposed method. Meanwhile, the optimized close-loop eigenmatrix can possess a small condition number, which means the system has achieved excellent robustness.

Active vibration control of a rotor bearing system using flexible piezoelectric patch actuators

2020 ◽  
Vol 31 (10) ◽  
pp. 1284-1297
Author(s):  
Maryam Brahem ◽  
Mnaouar Chouchane ◽  
Amira Amamou
Keyword(s):  
Vibration Control ◽  
Active Vibration Control ◽  
Linear Quadratic Regulator ◽  
Linear Quadratic ◽  
Steady State Condition ◽  
Lateral Vibrations ◽  
Rotor Bearing ◽  
Active Vibration ◽  
Run Up ◽  
Bearing System

Rotor vibration control is crucial for the reliability of rotating machines. This article applies active vibration control to reduce the vibration of a rotor bearing system using flexible piezoelectric patches as actuators mounted on the shaft external surface. The patches reduce the vibration due to unbalance forces by generating bending moments to counteract rotor deformation. An active vibration control system is designed based on a full-state linear quadratic regulator controller. Since proximity probes are used to measure the lateral vibrations of the rotor at few shaft positions, an observer is designed to estimate the unmeasured vibrations. The weighting matrices required by the linear quadratic regulator controller are selected by trial and error so that the displacement amplitudes are reduced to a minimum and the actuation voltages remain within the limitations defined by the manufacturer of the used patches. Simulated responses demonstrate the effectiveness of the designed controller in attenuating the lateral vibration of the rotor bearing system when using two actuating voltages. The vibration response is reduced for the steady-state condition and during run-up particularly at the first critical speed.

Electromagnetic bearing actuator for active vibration control of a flexible rotor

1998 ◽  
Vol 212 (8) ◽  
pp. 705-716 ◽  
Author(s):  
Z Yu ◽  
L T Meng ◽  
L M King
Keyword(s):  
Vibration Control ◽  
Control Algorithm ◽  
Active Vibration Control ◽  
Control Voltage ◽  
Electromagnetic Actuator ◽  
Control Force ◽  
Flexible Rotor ◽  
Rotor Bearing ◽  
Active Vibration ◽  
Bearing System

This paper presents a detailed description of the electromagnetic actuator for active vibration control of a flexible rotor bearing system. The transfer characteristics of the electromagnetic actuator are investigated theoretically and experimentally. The linearized relationship of the electromagnetic force/input control voltage can be achieved by employing the analogue square root control circuits. A control algorithm which allows the control force of the actuator to be computed to minimize the synchronous rotor vibration is discussed. Computer simulation on a simple rotor bearing system is presented to demonstrate the effectiveness of the control algorithm in synchronous vibration reduction using the electromagnetic actuator.

A comparison of active vibration control techniques - Output feedback vs optimal control

1987 ◽  
Author(s):  
ZORAN MARTINOVIC ◽  
RAPHAEL HAFTKA ◽  
WILLIAM HALLAUER, JR. ◽  
GEORGE SCHAMEL, II
Keyword(s):  
Optimal Control ◽  
Vibration Control ◽  
Output Feedback ◽  
Active Vibration Control ◽  
Control Techniques ◽  
Active Vibration
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