Prototyping a compact system for active vibration isolation using piezoelectric sensors and actuators

2013 ◽  
Vol 84 (5) ◽  
pp. 055002 ◽  
Author(s):  
Hui Shen ◽  
Chun Wang ◽  
Liufeng Li ◽  
Lisheng Chen
Keyword(s):  
Vibration Isolation ◽  
Piezoelectric Sensors ◽  
Sensors And Actuators ◽  
Piezoelectric Sensors And Actuators ◽  
Active Vibration ◽  
Active Vibration Isolation

Fault Detection in a Cracked Pipeline Embedded with Piezoelectric Sensors/Actuators Employing Bond Graph Approach

2012 ◽  
Vol 476-478 ◽  
pp. 1015-1019 ◽  
Author(s):  
M. Kolbadi Nejad ◽  
A. Selk Ghafari ◽  
A. Zabihollah
Keyword(s):  
Power Flow ◽  
Active Vibration Control ◽  
Bond Graph ◽  
Piezoelectric Sensors ◽  
Graph Structure ◽  
Sensors And Actuators ◽  
Piezoelectric Sensors And Actuators ◽  
Equivalent Impedance ◽  
Active Vibration ◽  
Simulation Results

The main scope of this article is to simulate a cracked pipeline embedded with piezoelectric sensors and actuators utilizing bond graph approach. Piezoelectric sensors/actuators are becoming very popular in various applications such as health monitoring, active vibration control or noise reduction, and as a part of the systems called smart structures. The proposed bond graph structure in this study, graphically illustrates the power flow between the electrical and mechanical frameworks included in the system. In addition, the proposed framework makes it possible to utilize a modular structure for separately representing the electrical polarization of the material and its macroscopic electrical and mechanical effects. Simulation results illustrate that at the location of the crack the equivalent impedance is increased and the capacitance is decreased in comparison with the intact region.

Active Vibration Control of a Hanged Rectangular Plate Partially Submerged Into Fluid by Using Piezoelectric Sensors and Actuators

2014 ◽  
Author(s):  
Moon K. Kwak ◽  
Dong-Ho Yang
Keyword(s):  
Vibration Control ◽  
Rectangular Plate ◽  
Natural Vibration ◽  
Active Vibration Control ◽  
Vibration Characteristics ◽  
Experimental Results ◽  
Piezoelectric Sensors ◽  
Sensors And Actuators ◽  
Piezoelectric Sensors And Actuators ◽  
Active Vibration

This paper is concerned with the active vibration control of a hanged rectangular plate partially submerged into a fluid by using piezoelectric sensors and actuators bonded to the plate. A dynamic model for the plate is derived by using the Rayleigh-Ritz method and the fluid effect is modeled by the virtual mass increase that is obtained by solving the Laplace equation. The natural vibration characteristics of the plate in air obtained theoretically are in good agreement with the experimental results. The changes in natural frequencies due to the presence of fluid were measured and compared to the theoretical predictions. Experimental results show that the theoretical predictions are in good agreement with the experimental results. The natural vibration characteristics of the plate both in air and in water are used for the active vibration control design. In this study, the multi-input and multi-output positive position feedback controller was designed based on the natural vibration characteristics and implemented by using a digital controller. Experimental results show that the vibration of the hanged rectangular plate both in air and partially submerged into a fluid can be successfully suppressed by using piezoelectric sensors and actuators.

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