Download or read book A Study of Active Noise and Vibration Control Using Filtered Reference Gradient Adaptive Lattice Algorithm written by Prasanth R. Vengala and published by . This book was released on 2005 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Active Noise and Vibration Control written by Waldemar R?czka and published by Trans Tech Publications Ltd. This book was released on 2016-03-21 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a result of scientific meeting of people working on active noise and vibration control methods and problems. The control of noise and vibration has been always proved to be a difficult task and in many cases it is not feasible. For many years, passive, active and semi-active techniques have been considered and developed. Flexible isolation systems or structural damping, control of suspension parameter or generating active force are used for vibration and noise control. The most important technics of vibration mitigation are active methods so the book collects papers as a contribution to discussion.
Download or read book Adaptive Algorithms for Active Noise and Vibration Control written by Marc Bodson and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this project was to develop and analyze advanced adaptive schemes for the active attenuation of sound and vibration. Implementations of algorithms such as the filtered-X LMS algorithm were proposed that require fewer computations than the standard implementation. Delay compensation techniques were also developed to combat performance reducing effects due to delay within the parameter updates. In particular, the extension of the method to adaptive echo cancellation was investigated. Progress was also made on adaptive algorithms for the rejection of periodic disturbances without measurement of the disturbance or of its frequency. A direct approach and an indirect approach were studied, and the resulting algorithms were tested successfully on an active noise control testbed. Disturbances with multiple harmonics and multi-channel systems were both considered.
Download or read book Adaptive Algorithms for Active Noise and Vibration Control written by and published by . This book was released on 2000 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this project was to develop and analyze advanced adaptive schemes for the active attenuation of sound and vibration. Implementations of algorithms such as the filtered-X LMS algorithm were proposed that require fewer computations than the standard implementation. Delay compensation techniques were also developed to combat performance reducing effects due to delay within the parameter updates. In particular, the extension of the method to adaptive echo cancellation was investigated. Progress was also made on adaptive algorithms for the rejection of periodic disturbances without measurement of the disturbance or of its frequency. A direct approach and an indirect approach were studied, and the resulting algorithms were tested successfully on an active noise control testbed. Disturbances with multiple harmonics and multi-channel systems were both considered.
Download or read book Adaptive Control and Noise Suppression by a Variable gain Gradient Algorithm written by and published by . This book was released on 1987 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Adaptive Filtering Applications written by Lino Garcia Morales and published by BoD – Books on Demand. This book was released on 2011-07-05 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: Adaptive filtering is useful in any application where the signals or the modeled system vary over time. The configuration of the system and, in particular, the position where the adaptive processor is placed generate different areas or application fields such as: prediction, system identification and modeling, equalization, cancellation of interference, etc. which are very important in many disciplines such as control systems, communications, signal processing, acoustics, voice, sound and image, etc. The book consists of noise and echo cancellation, medical applications, communications systems and others hardly joined by their heterogeneity. Each application is a case study with rigor that shows weakness/strength of the method used, assesses its suitability and suggests new forms and areas of use. The problems are becoming increasingly complex and applications must be adapted to solve them. The adaptive filters have proven to be useful in these environments of multiple input/output, variant-time behaviors, and long and complex transfer functions effectively, but fundamentally they still have to evolve. This book is a demonstration of this and a small illustration of everything that is to come.
Download or read book Active Control of Noise and Vibration written by Colin H. Hansen and published by Taylor & Francis Group. This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the publication of the first edition, considerable progress has been made in the development and application of active noise control (ANC) systems, particularly in the propeller aircraft and automotive industries. Treating the active control of both sound and vibration in a unified way, this second edition of Active Control of Noise and Vibration continues to combine coverage of fundamental principles with the most recent theoretical and practical developments. What's New in This Edition Revised, expanded, and updated information in every chapter Advances in feedforward control algorithms, DSP hardware, and applications Practical application examples of active control of noise propagating in ducts The use of a sound intensity cost function, model reference control, sensing radiation modes, modal filtering, and a comparison of the effectiveness of various sensing strategies New material on feedback control of sound transmission into enclosed spaces New material on model uncertainty, experimental determination of the system model, optimization of the truncated model, collocated actuators and sensors, biologically inspired control, and a discussion of centralised versus de-centralised control A completely revised chapter on control system implementation New material on parametric array loudspeakers, turbulence filtering, and virtual sensing More material on smart structures, electrorheological fluids, and magnetorheological fluids Integrating the related disciplines of active noise control and active vibration control, this comprehensive two-volume set explains how to design and implement successful active control systems in practice. It also details the pitfalls one must avoid to ensure a reliable and stable system.
Download or read book An Evaluation of Real time Adaptive Noise Cancelling Algorithms Using the TMS32020 Digital Signal Processor written by Matthew Lincoln Wagner and published by . This book was released on 1987 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fundamentals of Signals and Systems Using MATLAB written by Edward W. Kamen and published by Macmillan College. This book was released on 1997 with total page 706 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text presents an accessible yet comprehensive analytical treatment of signals and systems, and also incorporates a strong emphasis on solving problems and exploring concepts using MATLAB
Download or read book Active Noise Cancellation Using Selective Adaptive Filtering written by Oveal Walker and published by . This book was released on 2006 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intelligibility of speech and other audio in various acoustic environments can be very low based on the level of noise present in that space. Often in order to compensate for the noise in acoustic environments a passive approach is taken, in which sound absorption and isolation techniques are implemented throughout the physical space. Although this passive approach can provide suitable levels of noise reduction for a reasonable range of frequencies, several active noise control approaches are proven to be more effective, especially at frequencies below 500 Hz. Active Noise Control utilizes adaptive filtering algorithms to achieve significant noise attenuation of lower frequency noise that significantly degrades the desired audio signal. The level of effectiveness of various adaptive filtering algorithms can determine the overall noise attenuation and the rate at which the system attenuates the noise in the given space. Noise source location, level, and resonant space may dictate the amount of degradation caused on the input signal. Some acoustic spaces in which Active Noise Cancellation (ANC) headsets are used causes increasing resonance and inconsistent changes in noise power and amplitude. Special consideration of these signal characteristics are used to determine the stationary level of the noise signal, which is an ideal measure for determination of an adaptive filtering algorithm. Most Active Noise Control systems currently utilize only versions of the Least Mean Square adaptive filtering algorithm. This research will focus on a selective algorithm that will utilize descriptors to identify differences in the noise signal, and determine an optimal algorithm to be used for the filtering of distinct portions of the signal that are identified. The Recursive Least Squares adaptive algorithm will be used as the primary means of filtering due to its fast rate of convergence and tracking performance. A selective switching mechanism will be used to insure the Least Mean Squares algorithm is initiated only when signal conditions dictate effective noise control can be performed using this algorithm. Several different noise source environments are tested in order to attain the best active noise control solution to be used.
Download or read book Adaptive Algorithms for Active Noise Control written by Angela Kuo Wang and published by . This book was released on 1996 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Active Noise Control Using Adaptive Filtering written by Ram M. Vemuri and published by . This book was released on 1989 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Active Noise Control written by Su-u Hwang and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Active Noise Control Using Adaptive Filter Approaches written by Mohd. Hazrin Mohd. Dalhal and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Active Control of Impact Acoustic Noise written by Guohua Sun and published by . This book was released on 2013 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: Active noise control (ANC) has drawn widespread research interest in both academia and industry during the last two decades, especially in the automotive industry where better vehicle noise, vibration and harshness (NVH) performance is one of the important concerns for vehicle manufacturers. However, most of the current state-of-the-art ANC systems are mainly focused on stationary noises by following Gaussian distribution, and there is limited research work on ANC of impulsive and/or impact noise. In practice, there are many unwanted impact responses at industrial sites and in motor vehicles, such as noise generated by punching machines, combustion engines and pile drivers as well as impact road noise due to road bumps. This type of noise may pose a difficult challenge for the prevalent adaptive control algorithms, namely the filtered-x least mean square (FXLMS) algorithm. Hence, more in-depth understanding is required to design an ANC system with robust and efficient adaptive algorithms for treating impact acoustic noise. The first part of the dissertation concentrates on the development of more robust adaptive algorithms for generic impulsive noise. First, an enhanced modified filtered-x least mean M-estimate algorithm (MFXLMM) is proposed to tackle the impulsive-type noise, where the reference signal is fed through the Hampel's three-part M-estimator by setting thresholds for impulses. Second, a family of enhanced M-estimator based algorithms is proposed, where different types of robust criteria based on robust statistic theory are applied for non-Gaussian impulsive noise. This family of algorithms generalizes all the existing studies by previous researchers. Third, more specific observations are made for the convergence performance of the modified FXLMS algorithm for impact noise, where thresholds in the reference and error signal paths are added. This analysis is to address the underlying mechanism of the enhanced algorithm for impact noise due to the white noise and impulses with different durations. The second part of the dissertation is on impact noise with certain repetitiveness. First, a specific analytical convergence analysis of the FXLMS algorithm for repetitive impulse-induced noise is developed, where pure delay secondary path models are assumed. A step size bound is obtained which is in agreement with the previous studies. Moreover, a general secondary model is considered in the numerical simulations to further demonstrate the feasibility of applying the FXLMS algorithm for repetitive impact noise. Second, comparative experimental and simulation work are conducted to further validate the performance of FXLMS algorithm for repetitive impact noise. The feedback system with the iterative learning control (ILC) algorithm is also designed to compare with the FXLMS algorithm. Finally, a concluding work is performed to apply the enhanced FXLMS algorithm to impact road noise control. A frequency response function (FRF)-based sub-structuring technique is implemented to develop a coupled vehicle system model, where the passenger compartment is simplified as a 3-dimensional flexible-panel backed cavity model and the tire-wheel system is modeled as a flexible ring element and rigid wheel. Numerical simulations are conducted to validate the effectiveness of the proposed ANC system for interior impact road noise.
Download or read book Least Mean Square Adaptive Filters written by Simon Haykin and published by John Wiley & Sons. This book was released on 2003-09-08 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: Edited by the original inventor of the technology. Includes contributions by the foremost experts in the field. The only book to cover these topics together.
Download or read book Active Control of Noise and Vibration Ch 1 Background written by and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the publication of the first edition, considerable progress has been made in the development and application of active noise control (ANC) systems, particularly in the propeller aircraft and automotive industries. Treating the active control of both sound and vibration in a unified way, this second edition of Active Control of Noise and Vibration continues to combine coverage of fundamental principles with the most recent theoretical and practical developments. What's New in This Edition Revised, expanded, and updated information in every chapter Advances in feedforward control algorithms, DSP hardware, and applications Practical application examples of active control of noise propagating in ducts The use of a sound intensity cost function, model reference control, sensing radiation modes, modal filtering, and a comparison of the effectiveness of various sensing strategies New material on feedback control of sound transmission into enclosed spaces New material on model uncertainty, experimental determination of the system model, optimization of the truncated model, collocated actuators and sensors, biologically inspired control, and a discussion of centralised versus de-centralised control A completely revised chapter on control system implementation New material on parametric array loudspeakers, turbulence filtering, and virtual sensing More material on smart structures, electrorheological fluids, and magnetorheological fluids Integrating the related disciplines of active noise control and active vibration control, this comprehensive two-volume set explains how to design and implement successful active control systems in practice. It also details the pitfalls one must avoid to ensure a reliable and stable system.
