Accession Number : AD0283911

Title :   SIX-DEGREE-OF-FREEDOM EQUATIONS OF MOTION FOR A MANEUVERING RE-ENTRY VEHICLE

Corporate Author : CORNELL AERONAUTICAL LAB INC BUFFALO NY

Personal Author(s) : SCHULER, JOHN M. ; PRITCHARD, FRANCIS E.

PDF Url : AD0283911

Report Date : 15 JUN 1962

Pagination or Media Count : 180

Abstract : Equations of motion for a re-entry vehicle are developed for use with a digitally operated, fixed-base simulator. The equations provide: six- degrees-of-freedom for a vehicle of nonvarying mass hose trajectory and orientationARE GIVEN WITH RESPECT TO A SPHERICAL, ROTATING EARTH; AN INVERSE- SQUARE GRAVITATIONAL FORCE, A ROTATING ATMOSPHERE, AND RELEVANT ATMOSPHERIC PROPERTIES; AND AERODYNAMIC FORCES AND MOMENTS IN COEFFICIENT FORM, AND REACTION CONTROL MOMENTS. The only restriction on attitude, maneuver, or flight path is that flights directly over the North and South poles are excluded. The equations, as described, have been programme on an IBM 704 and specific solutions were obtained to show effects of maneuvers, pilot's inputs, different geophysical models, and mathematical simplifications. The report contains descriptive chapters on geophysics and aerodyn mics and control which are especially pertinent to re-entry simulation. In addition, Appendices extend the equations for varying mass, large thrust, and earth oblateness with rela ed effects.

Descriptors :   *ATMOSPHERE ENTRY, *DEGREES OF FREEDOM, *REENTRY VEHICLES, MATRICES(MATHEMATICS), THEORY, MOMENTS, AERODYNAMIC CHARACTERISTICS, PERTURBATION THEORY, GRAVITY, EQUATIONS, GEOPHYSICS, DIGITAL COMPUTERS, CELESTIAL MECHANICS, MANEUVERABILITY, SIMULATION, ENERGY MANAGEMENT, CONTROL

Subject Categories : Statistics and Probability
      Guided Missile Reentry Vehicles

Distribution Statement : APPROVED FOR PUBLIC RELEASE