Controller Technologies for Active Control of Low Frequency Noise and Vibration in Ship Structures


  1. Akpan, U.O
  2. Beslin, O.
  3. Brennan, D.P.
  4. Masson, P.
  5. Koko, T.S.
  6. and others
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
This study has been motivated by the need to control low frequency engine noise in ship structures. A wide range of controller technologies, methodologies and algorithms (including feedforward control, feedback control, adaptive control, control of tonal noise, control of broadband noise, decentralised control, neural network control, active noise cancellation, active vibration control and active structural acoustic control) have been reviewed. Furthermore, the steps involved in the design of an active control system have also been reviewed. The most likely significant noise and vibration transmission paths associated with engine problems namely, the engine mount, the piping and cooling systems, the drive shaft, the mechanical couplings and the airborne radiated noise have been considered in the survey. Based on factors such as robustness of controller technology, the characteristic of the disturbance, the operating environment and experience in other applications, recommendations on controller technologies for the various vibroacoustic paths have been provided. It is concluded from the study that the adaptive feedforward controller technology that uses an external reference signal is the best controller technology for all the vibroacoustic paths associated with the engine noise problem. TRUNCATED
Active noise control;Acoustic health;Noise management system
Report Number
DREA-SL-1999-132 — Paper
Date of publication
01 Sep 1999
Number of Pages
Hardcopy;Document Image stored on Optical Disk

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