Experimental and analytical study of active control of energy transmission through double walls using novel piezoelectric actuators

2003 ◽  
Vol 114 (4) ◽  
pp. 2391-2391
Author(s):  
Jianxin Gao ◽  
Li Cheng
Keyword(s):  
Active Control ◽  
Analytical Study ◽  
Piezoelectric Actuators ◽  
Energy Transmission

Active Control of Elastodynamic Vibrations of a Flexible Mechanism With Piezoelectric Actuator

1999 ◽  
Author(s):  
Ching-I Chen
Keyword(s):  
Control Theory ◽  
Active Control ◽  
Piezoelectric Actuator ◽  
Control Strategies ◽  
Piezoelectric Actuators ◽  
Structural Vibration ◽  
Control Technique ◽  
Vibration Modes ◽  
Time Sharing ◽  
Transient Dynamic

Abstract This study focused on the application of active vibration control strategies for flexible moving structures which degrade into transient dynamic vibration problem. These control strategies are based primarily on modal control methods in which the flexible moving structures are controlled by reducing their dominant vibration modes. This work numerically investigated active control of the elastodynamic response of a four-bar mechanical system, using a piezoelectric actuator. A controller based on the modified independent modal space control theory was also utilized. This control theory produced overall excellent performance in terms of achieving the desired closed-loop structural damping. The merits of this technique include its ability to manage the spill-over effect, i.e. eliminate the magnitude of vibrations associated with uncontrolled modes, using only a few selected modes for control. This control was accomplished using a time sharing technique, which reduces the number of piezoelectric actuators required to control a large number of vibration modes. Furthermore, this algorithm implements a procedure for determining the optimal locations for the piezoelectric actuators. The dynamics of a steel four-bar linkage was selected with a flexible coupler separated by six elements and one piezoelectric actuator was used in the numerical simulation. The optimal actuator position was located at the third element from the right to the left. Results in this study demonstrated that a highly desired the structural vibration damping could be achieved. This control technique can be applied to transient dynamic systems.

scholarly journals Active control of mechanical structures in research and education

2013 ◽  
Vol 40 (2) ◽  
pp. 203-221
Author(s):  
Tamara Nestorovic
Keyword(s):  
Active Control ◽  
Smart Structures ◽  
Piezoelectric Actuators ◽  
Noise Attenuation ◽  
Research Experience ◽  
Active Vibration ◽  
Research And Education ◽  
Young Researchers ◽  
Piezoelectric Actuators And Sensors

Several crucial phases of the overall approach to development and design of smart structures are outlined in this paper. They are focused on control of lightweight mechanical structures with respect to active vibration and noise attenuation using piezoelectric actuators and sensors. The research experience and growing interest in development of smart structures have motivated introduction of courses on smart structures at universities, which are being studied extensively and with great interest by young researchers and students. Some of the author?s experiences regarding education in this field will be addressed as well.

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