Damping analysis of beams submitted to passive and active control

Active 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 ...

the differential effects of debate and media analysis as relate to enhancing efl learners critical thinking ability and writing performances

critical thinking ability has an important role in education. accordingly, scholars around the world are searching for new ways for teaching and improving students critical thinking ability. in line with the studies in efl contexts supporting the positive relationship between critical thinking and writing performances, this study investigated the differential effects of halverson’s critical thi...

Active/Passive Control of Sound Radiation from Panels using Constrained Layer Damping

H∞ Control of Active Constrained Layer Damping

Conventional passive constrained layer damping treatments with visco-elastic cores are provided with built-in sensing and actuation capabilities to actively control and enhance their vibration damping characteristics. Two configurations of the resulting hybrid treatment are considered in this paper. In the first configuration the active control and passive operate separately; whereas in the sec...

Hybrid Active/passive Control of Sound Radiation from Panels with Constrained Layer Damping and Model Predictive Feedback Control