Accession Number:

ADA114404

Title:

Velocity Control and Electromechanical Feedback in Sonar Projector Arrays

Descriptive Note:

Technical rept.

Corporate Author:

NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CT

Personal Author(s):

Report Date:

1982-04-26

Pagination or Media Count:

43.0

Abstract:

Electromechanical feedback has had very little use in sonar-projector arrays because of the complexity it adds to the system. However, its employment may become necessary if a high degree of velocity control is demanded, as might be the case in arrays designed for radiation patterns with very low side lobes. In this report, the benefits and problems of electromechanical feedback are examined in an introductory manner, largely by numerical examples. The projector in the array mathematical model is assumed to be a simple piezoelectric type with a single degree of freedom mechanically. Before negative electromechanical feedback can be established as a reliable technique, more extensive stability studies must be carried out. The present work has shown that the system will not tolerate negative radiation resistances. In spite of these caveats, negative feedback is considered a promising approach to better performance whenever the simpler Carson method of velocity control is found to be inadequate.

Subject Categories:

  • Electrical and Electronic Equipment
  • Test Facilities, Equipment and Methods
  • Acoustic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE