Accession Number : AD0739171

Title :   The Application of Hybrid Computer Techniques to Determine a Minimum Fuel Trajectory of the Second Stage of a Three Stage Missile.

Descriptive Note : Master's thesis,

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

Personal Author(s) : Ebeltoft,Allen M. ; Carpinella,Ronald J.

Report Date : JUN 1970

Pagination or Media Count : 180

Abstract : The feasibility of using the hybrid computer to solve complex optimal control problems is demonstrated by determining a minimum fuel trajectory for the second stage of a three stage booster. The booster model includes pitch dynamics and realistic constraints on gimbal angle, pitch rage and angle of attack. Two solutions are obtained using a digital computer and a hybrid computer, and the solutions compare favorably to three significant figures. A generalized procedure for programming optimal control problems involving aerospace vehicles on the hybrid computer is derived. The procedure is based on the magnitude and frequency components of the state variable equations, and leads to minimization of roundoff/truncation error and problem solution time. (Author)

Descriptors :   (*SECOND-STAGE MOTORS, *FUEL CONSUMPTION), (*LAUNCH VEHICLES, SECOND-STAGE MOTORS), MATHEMATICAL PREDICTION, NUMERICAL ANALYSIS, OPTIMIZATION, COMPUTER PROGRAMMING, EQUATIONS OF MOTION, THESES

Subject Categories : Combustion and Ignition

Distribution Statement : APPROVED FOR PUBLIC RELEASE