Accession Number : ADD015268

Title :   Improved Articulated Fin/Wing Control System Statement of Government Interests.

Descriptive Note : Patent application filed, 8 Nov 91,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Beauchamp, Charles H ; Cincotta, Manual ; Raffa, Anthony ; Gauthier, Benoit

Report Date : 08 Nov 1991

Pagination or Media Count : 17

Abstract : An articulated control surface is provided for hydrodynamic control utilizing a moldable control surface. The central surface is shaped by contracting and elongating wire bundles fabricated with shape-memory alloys located in an adjacent cooling chamber. The shape-memory alloys contract when heated via an applied electric current and elongate when cooled, i.e., the electric current is removed. A pair of wire bundles is anchored inside the cooling chamber. Each bundle is routed over several pulleys in such a manner that a lateral movement is produced at the actuator end of the wire. A pair of bundles act in opposition to maintain dynamic tension at the actuator end. Cooling flow to opposing wire bundles is controlled independently to enhance response time and reduce power requirements. The actuator is a post extending from the cooling chamber to the trailing edge structure of the control surface.

Descriptors :   *ACTUATORS, *CONTROL SURFACES, *HYDRODYNAMICS, *PATENT APPLICATIONS, ALLOYS, BUNDLES, CHAMBERS, CONTRACTS, CONTROL, COOLING, DYNAMICS, EDGES, ELECTRIC CURRENT, FLOW, HOISTS, POWER, REQUIREMENTS, RESPONSE, SHAPE, STRUCTURES, SURFACES, TENSION, TIME, TRAILING EDGES, WIRE

Subject Categories : Machinery and Tools
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE