Accession Number : AD0741373

Title :   A Gradient Technique for Determining Improved Aircraft Trajectories for Reducing Aircraft Probility of Kill to Anti-Aircraft Gun Fire.

Descriptive Note : Master's thesis,

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

Personal Author(s) : Cooper,Floyd L. , Jr

Report Date : MAR 1972

Pagination or Media Count : 69

Abstract : The problem is to develop a technique for predicting improved aircraft flight paths that simultaneously reduce the probability of the aircraft being killed by anti-aircraft gun (AAA) fire, and fly the aircraft to certain specified position and velocity vectors, both in and out of gun range. This study develops and demonstrates a gradient minimization technique called OPTAAA for solving this problem. OPTAAA utilizes the SIMFIND1 AAA attrition model, written by the Institute for Defense Analyses, as a subroutine for computing the aircraft probability of kill. OPTAAA is applied to three problems. One of the problems utilizes two-dimensional aircraft trajectories and results in a 39.7 percent reduction in probability of kill. The second and third problems utilize three-dimensional aircraft trajectories and result in a 17.7 percent and a 41.5 percent reduction, respectively, in probability of kill. (Author)

Descriptors :   (*FLIGHT PATHS, OPTIMIZATION), (*ANTIAIRCRAFT GUNNERY, *KILL PROBABILITIES), MATHEMATICAL MODELS, FLIGHT CONTROL SYSTEMS, DESCENT TRAJECTORIES, THREAT EVALUATION, ANGLE OF ATTACK, ATTRITION, THESES

Subject Categories : Fire Control and Bombing Systems

Distribution Statement : APPROVED FOR PUBLIC RELEASE