Several topics from active vibration control technique using piezoelectric films

2008 ◽  
Author(s):  
Tsutomu Nishigaki
Keyword(s):  
Vibration Control ◽  
Active Vibration Control ◽  
Control Technique ◽  
Active Vibration ◽  
Piezoelectric Films

Comparison of Active and Hybrid Vibration Confinement With Conventional Active Vibration Control

1999 ◽  
Author(s):  
Lawrence R. Corr ◽  
William W. Clark
Keyword(s):  
Vibration Control ◽  
Control Method ◽  
Numerical Study ◽  
Active Vibration Control ◽  
Piezoelectric Actuators ◽  
Control Technique ◽  
Flexible Beam ◽  
Velocity Feedback ◽  
Active Vibration ◽  
Piezoelectric Actuators And Sensors

Abstract This paper presents a numerical study in which active and hybrid vibration confinement is compared with a conventional active vibration control method. Vibration confinement is a vibration control technique that is based on reshaping structural modes to produce “quiet areas” in a structure as opposed to adding damping as in conventional active or passive methods. In this paper, active and hybrid confinement is achieved in a flexible beam with two pairs of piezoelectric actuators and sensors and with two vibration absorbers. For comparison purposes, active damping is achieved also with two pairs of piezoelectric actuators and sensors using direct velocity feedback. The results show that both approaches are effective in controlling vibrations in the targeted area of the beam, with direct velocity feedback being slightly more cost effective in terms of required power. When combined with passive confinement, however, each method is improved with a significant reduction in required power.

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.

scholarly journals ACTIVE VIBRATION CONTROL TESTS OF ARCH STRUCTURES USING PIEZOELECTRIC FILMS

2013 ◽  
Vol 78 (686) ◽  
pp. 771-779
Author(s):  
Tomohiko KUMAGAI ◽  
Ken'ichi MINOWA ◽  
Ryoko KUWAHARA ◽  
Toshiyuki OGAWA
Keyword(s):  
Vibration Control ◽  
Active Vibration Control ◽  
Active Vibration ◽  
Arch Structures ◽  
Piezoelectric Films

scholarly journals Active Vibration Control of a Helicopter Rotor Blade by Using a Linear Quadratic Regulator

2018 ◽  
Author(s):  
Md Mosleh Uddin ◽  
Pratik Sarker ◽  
Colin R. Theodore ◽  
Uttam K. Chakravarty
Keyword(s):  
Vibration Control ◽  
Rotor Blade ◽  
Active Vibration Control ◽  
Linear Quadratic Regulator ◽  
Control Technique ◽  
Helicopter Rotor ◽  
Optimum Level ◽  
Linear Quadratic ◽  
Helicopter Rotor Blade ◽  
Active Vibration

Active vibration control is a widely implemented method for helicopter vibration control. Due to the significant progress in the microelectronics, this technique outperforms the traditional passive control technique due to the weight penalty and lack of adaptability for the changing flight conditions. In this paper, an optimal controller is designed to attenuate the helicopter rotor blade vibration. The mathematical model of the triply coupled vibration of the rotating cantilever beam is used to develop the state-space model of an isolated rotor blade. The required natural frequencies are determined by the modified Galerkin method and only the principal aerodynamic forces acting on the structure are considered. Linear quadratic regulator is designed to achieve the vibration reduction at the optimum level and the controller is tuned for the hovering and forward flight.

Active Vibration Control With Modified Positive Position Feedback

2009 ◽  
Vol 131 (4) ◽  
Author(s):  
S. Nima Mahmoodi ◽  
Mehdi Ahmadian
Keyword(s):  
Steady State ◽  
Vibration Control ◽  
Vibration Suppression ◽  
Active Vibration Control ◽  
Second Order ◽  
Loop System ◽  
Control Technique ◽  
Positive Position Feedback ◽  
Position Feedback ◽  
Active Vibration

A novel active vibration control technique based on positive position feedback method is developed. This method, which is a modified version of positive position feedback, employs a first-order compensator that provides damping control and a second-order compensator for vibration suppression. In contrast, conventional positive position feedback uses a single second-order compensator. The technique is useful for strain-based sensors and can be applied to piezoelectrically controlled systems. After introducing the concept of modified positive position feedback, this paper investigates the stability of the new method for locating gain limits. Stability conditions are global and independent of the dynamical characteristics of the open-loop system. Using root locus plots, proper compensator frequency is identified and damping of the closed-loop system is studied. The performance of the modified positive position feedback for both steady-state and transient dynamic control is studied. The experimental and numerical results show that the proposed method is significantly more effective in controlling steady-state response and slightly advantageous for transient dynamics control, as compared with conventional positive position feedback.

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