講演会のご案内

下記のように、関西大学先端科学技術推進機構の主催および
下記の皆様の共催により,2月26日(木)15時から Elliott 教授講
演会を開催致します。多数のご来場をお待ちしております。

記

日時:平成27年2月26日(木)15時〜17時
場所:関西大学千里山キャンパス第四学舎3号館2階3202教室
講師:Stephen J. Elliott, Professor, ISVR University of
Southampton
演題: Active Control of Sound in Vehicles and in the Ear
主催:関西大学先端科学技術推進機構
共催:日本騒音制御工学会アクティブコントロール分科会
IEEE Signal Processing Society Kansai Chapter
IEEE Student Branch at Kansai University
日本音響学会関西支部
電子情報通信学会信号処理研究会
電子情報通信学会応用音響研究会
日本音響学会騒音振動研究会
Audio Engineering Society日本支部

講演会終了後に懇親会(参加費3000円を予定)を開催します.
参加希望の方は2月16日までに下記世話人までご連絡ください.

世話人:関西大学システム理工学部 梶川嘉延 kaji@kansai-u.ac.jp

講師紹介:Prof. Steve Elliott graduated with first class joint
honours BSc in physics and electronics from the University of
London, in 1976, and received the PhD degree from the University
of Surrey in 1979 for a dissertation on musical acoustics. After a
short period as a Research Fellow at the ISVR and as a temporary
Lecturer at the University of Surrey, he was appointed Lecturer at
the Institute of Sound and Vibration Research (ISVR), University
of Southampton, in 1982. He was made Senior Lecturer in 1988,
Professor in 1994, and served as Director of the ISVR from 2005 to
2010. His research interests have been mostly concerned with the
connections between the physical world,signal processing and
control, mainly in relation the active control of sound using
adaptive filters and the active feedback control of vibration.
This work has resulted in the practical demonstration of active
control in propeller aircraft, cars and helicopters. His current
research interests include modular systems for active feedback
control and modelling the active processes within the cochlear.
Professor Elliott has published over 250 papers in refereed
journals and 500 conference papers and is co-author of Active
Control of Sound (with P A Nelson 1992), Active Control of
Vibration (with C R Fuller and P A Nelson 1996) and author of
Signal Processing for Active Control (2001).
He is a Fellow of the Acoustical Society of America, the IET and
the IOA and a senior member of the IEEE. He was jointly awarded
the Tyndall Medal from the Institute of Acoustics in 1992 and
the Kenneth Harris James Prize from the Institution of Mechanical
Engineers in 2000. He was made a Fellow of the Royal Academy of
Engineering in 2009

講演概要:The low frequency sound and vibration inside aircraft
and cars is now attenuated using commercial active control
systems. These typically operate using many shakers acting on the
structure to modify its vibration and hence reduce excitation of
the sound field. As the structure becomes larger, the number of
actuators and sensors required for effective control rises
significantly. Conventional, fully coupled, control systems then
become costly in terms of weight and sensitivity to individual
failures. An alternative strategy is to distributing the control
over multiple local controllers, which has been shown to be
effective in a number of cases. Recent work will be presented on
tuning these local control loops to maximise the power they absorb
from the structure, which may allow the mass production of generic
active control modules that include an actuator, sensor and self-
tuning controller. The workings of the inner ear also provide a
remarkable natural example of distributed active control, whose
objective is to enhance the motion within the cochlea.
A simple model for this cochlear amplifier, in which each of the
outer hair cells act as a local control loop, will be described
and its use illustrated in predicting the otoacoustic emissions
generated by the ear. These emissions are used clinically to
screen the hearing of young children and so it is important to
understand how they are generated within the cochlea.