4점 가진을 이용한 외부조화가진 시스템의 능동제어 성능 분석

Underwater radiated noise is one of the most detective factors in underwater weapon systems like submarine. A passive vibration reduction method based on elastic mount is known as the effective one for the vibration from a shipboard machinery transmitted to the hull which is radiated as noise outside the hull. Also recent naval sonar systems are being developed to have the capability to detect the ship-borne acoustic signals in the low frequency range. This motivates another approach to be researched instead of the passive method. An alternative to the passive method is an active one with electromagnetic actuator based on a conventional rubber mount in the low frequency range. In this study, an experimental performance analysis of active control for an external harmonic excitation system in the cylindrical structure was carried out using four actuators to investigate the active control effect with 2 control algorithm-MHHC and FXLMS.