Accession Number : AD0770081

Title :   Use of the Analog Computer in the Study of the Effects of Aerodynamics on Ballistic Trajectory.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING

Personal Author(s) : Wiles,John A.

Report Date : DEC 1972

Pagination or Media Count : 66

Abstract : A study was made to see if the analog computer could be programmed in such a manner that it became a useful tool for the weapons design engineer in his analysis of free-fall bomb trajectories. The equations of motion were derived for the two-dimensional trajectory of a bomb, including pitching motion about the nominal flight path. The aerodynamic forces and moments were generated on the computer by means of nonlinear components. Several trial runs were made and it was determined that the accuracy of the analog solution, when compared to an equivalent digital solution, was sufficient for a first order analysis of trajectory variations. The use of the program was demonstrated by varying static margin and initial angle of attack and observing the resultant changes in the ground range of the bomb. The program is more versatile than this, however, and can be used to observe all trajectory phenomena while varying any of the physical or aerodynamic parameters. (Author)

Descriptors :   (*Bomb trajectories, Analog simulation), Computer programming, Aerodynamic forces, Moments, Equations of motion, Ballistic trajectories, Theses

Subject Categories : Computer Programming and Software
      Armor

Distribution Statement : APPROVED FOR PUBLIC RELEASE