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: In this article, the vibration characteristics of composite pyramidal truss core sandwich plates with piezoelectric actuator/sensor pairs were investigated, and the active vibration control methods of the s...
Abstract: The vibration characteristics of composite pyramidal truss core sandwich plates with piezoelectric actuator/sensor pairs were investigated, and the active vibration control methods of the s...
23 citations
TL;DR: In this article, the authors present a theoretical study of decentralized velocity feedback control systems for the reduction of sound transmission through double panels, consisting of two plates which are coupled acoustically by the air in the cavity between them and structurally by four elastic mounts.
Abstract: This paper presents a theoretical study of decentralized velocity feedback control systems for the reduction of
sound transmission through double panels. The system studied consists of two plates which are coupled acoustically
by the air in the cavity between them and structurally by four elastic mounts. The geometrical and material
properties of the double panel have been chosen so as to approximate a section of an aircraft fuselage skin. The outer
panel of the skin (the source panel) is excited by oblique plane waves and the consequent sound power radiated from
the inner panel (the radiating panel) is calculated. First, a parametric study of passive sound transmission of double
panels with different geometrical and material properties is carried out. Second, active vibration control is
implemented using 16 decentralized direct velocity feedback loops. Performance of such a control system is assessed
for four control cases. The first two cases deal with skyhook force actuators with collocated velocity sensors, which
implement active damping either on the source panel or on the radiating panel. In the third case, skyhook actuators
and collocated velocity sensors are located on both panels. Finally, an approach using actuators that react between
the two panels with collocated relative velocity sensors is considered.
23 citations
TL;DR: In this paper, a hybrid smart composite beam actuated by piezoceramics and electro-rheological fluids (ERFs) actuators is investigated for the control of vibration.
Abstract: In the present study, the fuzzy control of vibration is investigated for a hybrid smart composite beam actuated by piezoceramics and electro-rheological fluids (ERFs) actuators. A carbon fiber reinforced plastics cantilevered beam containing ERF with bonded piezoceramics is vibrated under forced sinusoidal external excitation. A fuzzy model of the controlled element containing two actuators is formed because the application of a linear control theory to the vibration control is difficult due to intense nonlinearity in the ERF actuator. The parameters of the fuzzy model are identified by using a hybrid neuro-fuzzy system. The fuzzy controller for vibration suppression of the composite beam designed is based on the fuzzy model by using modern control theory. The effect of the vibration control system with a fuzzy controller is verified by simulation and experiment.
23 citations
TL;DR: Based on the assumed mode method, piezoelectric coupling model, and Hamilton's principle, the dynamic equation of the single flexible manipulator (SFM) with surface bonded actuators is established in this paper.
Abstract: The piezoelectric actuators are used to investigate the active vibration control of flexible manipulators in this paper. Based on the assumed mode method, piezoelectric coupling model, and Hamilton’s principle, the dynamic equation of the single flexible manipulator (SFM) with surface bonded actuators is established. Then, a singular perturbation model consisted of a slow subsystem and a fast subsystem is formulated and used for designing the composite controller. The slow subsystem controller is designed by fuzzy sliding mode control method, and the linear quadratic regulator (LQR) optimal control method is used to design fast subsystem controller. Furthermore, the changing trends of natural frequencies along with the changes in the position of piezoelectric actuators are obtained through the ANSYS Workbench software, by which the optimal placement of actuators is determined. Finally, numerical simulations and experiments are presented. The results demonstrate that the method of optimal placement is feasible based on the maximal natural frequency, and the composite controller presented in this paper can not only realize the trajectory tracking of the SFM and has a good result on the vibration suppression.
22 citations
Patent•
21 Oct 1993TL;DR: In this paper, the natural frequencies of a given vibration mode of the vibrations in the first and second directions coincide or substantially coincide with each other in a vibration driven motor or actuator.
Abstract: A vibration driven motor or actuator has a piezoelectric element, arranged in a vibrating member, for generating a vibration in a first direction, and another piezoelectric element, arranged in the vibrating member, for generating a vibration in a second direction different from the first direction. In the motor or actuator, the vibrating member has a recess portion which shaved e.g., by a laser, or a portion added with a mass, so that the natural frequencies of a given vibration mode of the vibrations in the first and second directions coincide or substantially coincide with each other.
22 citations