OPTIMAL CONTROL OF HYDROFOIL SHIP LATERAL DYNAMICS

A linear mathematical model of the lateral dynamics of a foilborne vessel equipped with a fully submerged hydrofoil system is developed. As such a vessel is inherently dynamically unstable it requires an automatic control system to provide motion stabilization. Using the techniques of modern control theory, an optimal controller is designed for a hypothetical ship moving through beam seas at a speed of 50 knots. The performance index used in this application is a functional of both the lateral acceleration experienced in the wheelhouse and the hydraulic power required by the actuators. Because of the large number of feedbacks required, an optimal controller may not be practical. This leads to the consideration of an adequate suboptimal controller which employs a reduced number of feedbacks. The performance of the final design is evaluated in beam seas using a time domain simulation. As a final step, the analysis is extended to include the effect of uncertainty in the sensor measurements, and a Kalman filter is designed to generate the estimates of the state variables required by the control system.

  • Supplemental Notes:
    • Proceedings Fifth Ship Control Systems Symposium, David W. Taylor Naval Ship Research and Development Center, Annapolis, Maryland, October 30-November 3, 1978, Volume 2.
  • Corporate Authors:

    David Taylor Naval Ship R&D Center

    Bethesda, MD  USA  20084
  • Authors:
    • Whyte, P H
  • Publication Date: 1978

Media Info

  • Features: References;
  • Pagination: 30 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00187990
  • Record Type: Publication
  • Source Agency: David Taylor Naval Ship R&D Center
  • Report/Paper Numbers: Proceeding
  • Files: TRIS
  • Created Date: Feb 3 1979 12:00AM