Abstract
Radiation cluster control is proposed for the purpose of attenuating harmonic sound radiation into a free field using error signals derived from structural vibration sensors. The approach falls into a category of MAC (middle authority control) between used LAC (low authority control : structural modal control) and HAC (high authority control : radiation modal control), possessing the benefit of practicality of LAC, while providing high control performance as well as flexibility of control gain assignment similar to HAC. The structure of 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 proposed.
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