title: Radiation clusters and the active control of sound transmission into a symmetric enclosure.
abstract: Radiation cluster control is proposed for the purpose of attenuating harmonic sound transmission into a symmetric enclosure using error signals derived from structural vibration sensors. The approach falls into a category of middle authority control, which is between LAC (low authority control: structural modal control) and HAC (high authority control: radiation modal control), possessing the benefit of practicality over LAC, while providing high control performance and some flexibility of control gain assignment similar to HAC. The structure of a radiation cluster control system is outlined, showing that it is possible to control a target cluster without affecting the other clusters. A design procedure for the radiation cluster control system is then proposed. Numerical results are also presented.
authors.affiliation: Department of Aerospace Engineering, Tokyo Metropolitan University, 6-6 Asahigaoka, Hino-city, Tokyo, 191-0065, Japan. u6991501@cc.tmit.ac.jp
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Kaizuka
authors.forename: Nobuo
authors.initials: N
authors.lastname: Tanaka