Accession Number : ADD012272

Title :   Centrifugally Operated Moving-Mass Roll Control System.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Platus,Daniel H

Report Date : 25 Mar 1986

Pagination or Media Count : 5

Abstract : This patent discloses a roll control system for a reentry vehicle having the pay load positioned within the vehicle so as to offset the center of gravity from the aerodynamic axis of the vehicle. A radial mass unbalance is created in the aft end of the vehicle to create a trim angle of attack dependent upon the vehicle roll rate which provides a source of roll torque with the out-of-plane radial center of mass offset. With the use of a mass and spring arrangement, the mass unbalance is controlled by centrifugal force to terminate the roll torque at the prescribed design rate.

Descriptors :   *PATENTS, *ATTITUDE CONTROL SYSTEMS, *REENTRY VEHICLES, ROLL, AERODYNAMIC FORCES, CENTER OF GRAVITY, MASS, BALANCE, TRIM ANGLE, ANGLE OF ATTACK, TORQUE, AXES

Subject Categories : Guided Missile Dynam, Config & Cntrl Surfaces
      Guided Missile Reentry Vehicles

Distribution Statement : APPROVED FOR PUBLIC RELEASE