Marine Vibrator Control
Researchers: Bo Bernhardsson, Olof Sörnmo
Funding: PGS
The objective is to model and control large underwater loudspeakers, known as marine vibrators, that are used to generate acoustic signals.
Performance requirements on out-of-band spectrum of the acoustic signal are achieved by careful characterization of the dynamical behavior of the vibrators and use of frequency-domain Iterative Learning Control (ILC). This has been found to successfully reduce the impact of nonlinearities such as friction and backlash. A 40 dB suppression of out-of-band harmonics has been acheived in experiments (in air).
The research is described in detail in the article "Frequency-Domain Iterative Learning Control of a Marine Vibrator", which has been accepted for publication in the journal "Control Engineering Practice".
The project is funded by the Norwegian company PGS.
2016-02-01