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- 【開催案内】騒音・振動制御研究グループ講演会2015.2.26開催
最新情報
【開催案内】騒音・振動制御研究グループ講演会2015.2.26開催
騒音・振動制御研究グループ
- 日時：
- 平成27年2月26日（木） 15:00～17:00
- 開催場所：
- 関西大学 千里山キャンパス 第4学舎3号館 2階 3202教室
- 演題：
- Active Control of Sound in Vehicles and in the Ear
- 講師：
- Stephen J. Elliott
Professor, University of Southampton, ISVR - 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.
＊科学研究費助成事業(基盤研究(C))
＊本講演は英語で行われます - 申込み：
- 不要
- 参加費：
- 無料
- 問合せ：
- 関西大学 システム理工学部 教授 梶川 嘉延
- E-mail:kaji@kansai-u.ac.jp
- 【お申込み・お問合せ】
- 関西大学先端科学技術推進機構
〒564-8680 大阪府吹田市山手町3-3-35
TEL:06-6368-1178 FAX:06-6368-0080 E-Mail: sentan@ml.kandai.jp -
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