Topic
Active vibration control
About: Active vibration control is a research topic. Over the lifetime, 6770 publications have been published within this topic receiving 76599 citations. The topic is also known as: active vibration damping.
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TL;DR: A review of the general approaches following the passive and active control technologies are presented, which are including optimal layout technique of pipeline and clamps, constrained layer damping technique, vibration absorber technique, hydraulic hose technique, optimal pump structure technique, and active vibration control technique of Pipeline system.
70 citations
TL;DR: In this article, a feedback law is used to couple the dynamic of a simplified rotor-bearing system with the pneumatic and dynamic characteristics of a piezoelectric actuated valve system.
70 citations
TL;DR: The proposed actuator only used the first-order longitudinal vibration to generate linear motion, which made the design, optimization, and miniaturization of the actuator more flexible by abbreviating the frequency degeneration.
Abstract: A frog-shaped linear piezoelectric actuator was proposed, designed, fabricated, and tested. The proposed actuator only used the first-order longitudinal vibration to generate linear motion, which made the design, optimization, and miniaturization of the actuator more flexible by abbreviating the frequency degeneration. By stimulating the first-order longitudinal vibration, alternate oblique movements are formed on the ends of two driving feet. Meanwhile, an elongating and shortening movement of the whole actuator is generated. When two parallel walls are in contact with the ends of two diving feet and a vertical preload is applied, the vertical components of the alternate oblique movements will overcome the preload, while the horizontal components of the alternate oblique movements and the elongating and shortening movements will together push the actuator into linear motion. Vibration characteristics and alternate oblique movements of the driving feet were investigated by the finite-element method. Experiment tests of vibration characteristics and mechanical output ability were then carried out. The tested resonance frequency and vibration amplitudes agreed well with the calculated ones. The prototype achieved a maximum speed and a thrust of 287 mm/s and 11.8 N, respectively.
70 citations
TL;DR: The paper discusses the use of a simple position control system approach to improve the performance of lightly damped dynamic systems using a delayed position feedback signal to actively control the vibrations of flexible structures.
70 citations
TL;DR: In this paper, the authors investigated the active aeroelastic flutter properties of supersonic plates by using the piezoelectric material and found that the active stiffness and active mass have prominent effects on the flutter characteristics of the su personic plates.
69 citations