Corpus ID: 118438940

Adaptive feedback control system for reduction of vibroacoustic emission

  title={Adaptive feedback control system for reduction of vibroacoustic emission},
  author={Łukasz J. Nowak},
The aim of the present study is to introduce the possibilities of modifying vibrations of a thin plate structure with arbitrary boundary conditions using the developed, original active feedback control system in such manner that the amplitude of the acoustic pressure field generated by the plate is minimized in a selected point of the ambient space. Theoretical investigations on the phenomena underlying the processes of detection and excitation of vibrations of thin plate structures using… Expand
Teaching communication for safety in selected water based recreational disciplines
Abstract This paper describes the concept of didactic communication and verifies the course of teaching selected disciplines of water based recreation, i.e. swimming (at the standard techniqueExpand


Active Control of Sound Radiation Pressure
This paper is concerned with the problem of suppressing the acoustic radiation pressure generated by a structure vibrating in air. The approach is to control the vibration of the modes of theExpand
Active control of sound transmission/radiation from elastic plates by vibration inputs, II: Experiments
Actively controlled harmonic force inputs were applied experimentally to reduce the sound transmitted through an elastic circular plate. The control implementation used a time domain least meanExpand
Theory of feedforward controlled system eigenproperties
Abstract Adaptive feedforward algorithms have be successfully applied in the active control of sound and vibration. However, the actual mechanisms of control inherent in the technique remain an areaExpand
Active control of sound transmission/radiation from elastic plates by vibration inputs. I - Analysis
Active control of sound radiation from vibrating plates by oscillating forces applied directly to the structure is analytically studied. The model consists of a plane acoustic wave incident on aExpand
Active vibroacoustic control with multiple local feedback loops
Local velocity feedback using multiple miniature accelerometers will be investigated, together with either collocated force actuators or piezoceramic actuators placed under each sensor, and multiple local feedback loops are predicted to be stable. Expand
Active suppression of acoustic radiation from impulsively excited structures
The objective is to use active control to suppress the acoustic energy that is radiated to the far field from a structure that has been excited by a short‐duration pulse. The problem is constrainedExpand
Adaptive feedforward and feedback methods for active/passive sound radiation control using smart foam
This work investigates and compares the potential of adaptive feedforward and feedback methods for a hybrid active/passive radiation control using smart foam. The radiating structure is a vibratingExpand
Vibration Control of Composite Plates via Optimal Placement of Piezoelectric Patches
A simple optimal placement strategy of piezoelectric sensor/actuator (S/A) pairs for vibration control of laminated composite plate is presented, where the active damping effect under a classicalExpand
Acoustic radiation of vibrating plate structures submerged in water
The paper presents results of the theoretical and numerical investigation on acoustic radiation of vibrating plate structures submerged in water. The current state of the art on the considered issuesExpand
Optimal placement and active vibration control for piezoelectric smart flexible cantilever plate
Some flexible appendages of spacecraft are cantilever plate structures, such as sun plate and satellite antenna. Thus, vibration problem will be caused by parameter uncertainties and environmentalExpand