Stability and maneuvering of hybrid hydrofoil/SWATH in foilborne mode

The hybrid hydrofoil/SWATH, designed and patented by Stefano Brizzolara, is a novel vehicle design that is optimized to operate in both a high speed foilborne mode and a displacement mode. The retractable hydrofoils on the vehicle take on a unique four surface piercing anhedral foil configuration. This foilborne design is previously unassessed for stability and maneuvering characteristics. A six degree of freedom model of the foilborne vehicle dynamics is introduced as a framework to study vehicle stability and maneuvering. Linearized models of the vehicle dynamics are compared to the six degree of freedom results in both the vertical and horizontal planes. Foil configuration design criteria are derived for pitch equilibrium as well as pitch and directional stability. A method for turning the vehicle by rotationally actuating the foil dihedral angles is introduced, and the vehicle state in the unsteady and steady portion of the turn is simulated.

Department dc:contributor.department

Massachusetts Institute of Technology. Department of Mechanical Engineering.

Grantor dc:publisher

Massachusetts Institute of Technology

Year dc:date.issued

2017

Author dc:creator

• Williams, Samuel E. (Samuel Ernest)

Advisor dc:contributor.advisor

• Stefano Brizzolara.

• Mechanical Engineering.

Statement dc:rights

• MIT theses are protected by copyright. They may be viewed, downloaded, or printed from this source but further reproduction or distribution in any format is prohibited without written permission.

Licence dc:rights.uri

• http://dspace.mit.edu/handle/1721.1/7582

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/1721.1/108905

OAI identifier oai:identifier

oai:dspace.mit.edu:1721.1/108905