منابع مشابه
Detection of Structural Cracks Using Piezoelectric Active Sensors
This study proposes a novel approach to identifying crack damage common to metallic structural elements under extreme cyclic loading. Using two piezoelectric pads surface mounted to a structural element, broadband signals can be used to locally excite the element using one pad and the corresponding system response measured with a second pad. An auto-regressive with exogenous input (ARX) system ...
متن کاملActive and Passive Damping based on Piezoelectric Elements
Piezoelectric elements are widely used for damping micro-vibrations in mechanical structures. Active damping can be realised robustly by means of collocated actuator-sensor-pairs, controlled so as to extract vibration energy. Excellent damping performance is possible as long as sufficient controllability is assured. Passive damping based on a single piezoelectric element can be realised by the ...
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Excessive vibration of turbomachinery blades causes high cycle fatigue (HCF) problems requiring damping treatments to mitigate vibration levels. Based on the technical challenges and requirements learned from previous turbomachinery blade research, a feasibility study of resonant damping control using shunted piezoelectric patches with passive and active control techniques has been conducted on...
متن کاملDamping Specification of Automotive Structural Components via Modal Projection
In the automotive industry damping has become an important and highly effective design parameter for reducing low-frequency vibroacoustic noise in the vehicle compartment. It is a fairly straightforward procedure to compute vibroacoustic frequency responses of a damped car body for a given excitation and to compare the resulting response levels to a prescribed specification over a frequency ran...
متن کاملActive Vibration Damping of a Smart Flexible Structure Using Piezoelectric Transducers: H∞ Design and Experimental Results
This paper deals with active vibration control of a plate like smart flexible structure. This plate is equipped with several thin piezoelectric patches. Some of them are used as sensors and the others as actuators. They are optimally positioned and not collocated. The main goal of control is to reduce the most energetic vibrating modes. By using a state-space representation of a MIMO model of t...
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ژورنال
عنوان ژورنال: Shock and Vibration
سال: 2013
ISSN: 1070-9622,1875-9203
DOI: 10.1155/2013/126870