Minimization of Acoustic Potential Energy in Enclosure Using Both Active Noise Control and Active Vibration Control
Kozue Kobayashi,Nobuo Tanaka +1 more
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In this article, the minimization of acoustic potential energy in an enclosure by both active noise control (ANC) and active vibration control (AVC) is studied. And the optimal feed-forward control law for minimizing the acoustic energy in a cavity walled by flexible structures is derived, where the control acoustic power radiated from each acoustic secondary source used for ANC and control vibration power infused by each control actuator for AVC become zero under the optimal control condition.Abstract:
This paper concerns the minimization of acoustic potential energy in an enclosure by both active noise control (ANC) and active vibration control (AVC). First, the optimal feedforward control law for minimizing the acoustic potential energy in a cavity walled by flexible structures is derived. Secondly, it is found that the control acoustic power radiated from each acoustic secondary source used for ANC and control vibration power infused by each control actuator for AVC become zero under the optimal control condition. It is also found that the zero control power phenomena are the necessary conditions for the optimality. Finally, the control effects for minimizing the potential energy using ANC and AVC are demonstrated from a viewpoint of numerical analysis.read more
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Book ChapterDOI
Zero Control Power Phenomena in the Minimization of Sound Power Using Multiple Control Sources
TL;DR: In this article, the analytical solution of the zero control power law in the case of multiple sound sources is derived, and it is numerically shown that as the number of sound sources increases, the control effect of the total acoustic power is improved.
Journal ArticleDOI
Global active noise control in vibro-acoustic cavities using acoustic sensing
TL;DR: Development of a global active noise control method based on virtual sensing of the acoustic potential energy in the cavity under the presence of structural and acoustic disturbances is presented and minimisation of the estimatedoustic potential energy through a feedforward control law is developed.
Journal ArticleDOI
車載用ロードノイズアクティブ構造騒音制御システム構成のためのアクチュエータ配置決定法と多入出力補償器の設計法;車載用ロードノイズアクティブ構造騒音制御システム構成のためのアクチュエータ配置決定法と多入出力補償器の設計法;Actuator Allocation and Multi Input Multi Output Controller Synthesis Method for Active Structural Acoustic Control System in Vehicle Cabin
References
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Journal ArticleDOI
Active control of sound transmission/radiation from elastic plates by vibration inputs. I - Analysis
TL;DR: In this article, active control of sound radiation from vibrating plates by oscillating forces applied directly to the structure is analytically studied, and it is shown that global attenuation of broadband radiated sound levels for low to mid-range frequencies can be achieved with one or two control forces, irrespective of whether the system is on or off resonance.
Journal ArticleDOI
The active minimization of harmonic enclosed sound fields, part I: Theory
TL;DR: In this paper, an analysis of the effectiveness with which active methods can be used for producing global reductions in the amplitude of the pressure fluctuations in a harmonically excited enclosed sound field is presented.
Journal ArticleDOI
The minimum power output of free field point sources and the active control of sound
TL;DR: In this paper, the authors used the near field technique developed by Levine to calculate the total power output from an arbitrary number of point primary and secondary sources, which is a quadratic function of the complex strengths of the secondary point sources.
Journal ArticleDOI
The active minimization of harmonic enclosed sound fields, part II: A computer simulation
TL;DR: In this article, it was shown that when a single mode dominates the response near optimal reductions in acoustic potential energy can be achieved by minimizing the pressure at a single sensor, provided that the source is placed at a maximum of the primary sound field.
Journal ArticleDOI
Active control of harmonic sound transmission into an acoustic enclosure using both structural and acoustic actuators
TL;DR: Since the transmitted sound field is governed by both plate- and cavity-dominated modes, the hybrid use of both types of actuators is shown to be a desirable configuration for the active control of sound transmission into a structural-acoustic coupled system.
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