
Accession Number : AD0743612
Title : Microwave ILS Scanning Beam Data Rate Analysis Applied to the CH53A Helicopter.
Descriptive Note : Master's thesis,
Corporate Author : AIR FORCE INST OF TECH WRIGHTPATTERSON AFB OHIO SCHOOL OF ENGINEERING
Personal Author(s) : Stolz,Paul R.
Report Date : APR 1972
Pagination or Media Count : 113
Abstract : Data rate requirements for low visibility approach with a sample data measurement of glidslope deviation was investigated analytically using CH53A helicopter dynamics. A 'window' was defined by specifying certain allowable deviations in the aircraft motion variables which are acceptable for continuation of the landing at a 100 ft decision altitude. The approach performance was defined as the probability of missing the window, which corresponds to the probability of a missed approach. The landing approach process was modeled by a system of stochastic differential equations which account for the aircraft dynamics, atmospheric disturbances, guidance errors and data rate. The flight control system was modeled by a state estimator and a state feedback matrix which was optimized so as to minimize the probability of a missed approach subject to rms constraints on control activity. (Author)
Descriptors : (*INSTRUMENT LANDINGS, MICROWAVE EQUIPMENT), (*HELICOPTERS, INSTRUMENT LANDINGS), GLIDE PATH SYSTEMS, AIRCRAFT LANDINGS, EQUATIONS OF MOTION, GUST LOADS, APPROACH, FLIGHT PATHS, FLIGHT CONTROL SYSTEMS, THESES
Subject Categories : Helicopters
Distribution Statement : APPROVED FOR PUBLIC RELEASE