
Accession Number : AD0483921
Title : ANALYSIS OF AN ORBITAL 'HARD' RENDEZVOUS CONCEPT.
Descriptive Note : Final rept. AprDec 65,
Corporate Author : AIR FORCE FLIGHT DYNAMICS LAB WRIGHTPATTERSON AFB OH
Personal Author(s) : Midolo, Lawrence L.
Report Date : APR 1966
Pagination or Media Count : 100
Abstract : This report is an analysis of a 'hard' rendezvous concept employing a constant tension tetherline retrieval. Hard rendezvous deals with initial relative velocities of 200 to 400 fpc between two vehicles at a 500 mi orbital attitude. The intent of this study is to determine the feasibility of tetherline retrieval without the use of attitude control for the interceptor vehicle. The equations of motion were analytically developed for a reelout and reelin scheme. These equations were then solved on a 7090/7094 digital computer. Both coplanar and noncoplanar conditions were studied. The coplanar and noncoplanar reelout results were essentially the same. Reelout constant tension runs were made for tensions of 50, 100 and 200 lbs. This resulted in tetherline lengths ranging from 940 to 14,300 ft. Maximum angular velocities of an interceptor mass ranged from 0.0095 to 0.046 RAD/SEC in pitch and from 0.01 to 0.39 in yaw for the noncoplanar runs. Reelin is more complex and required thrust control to remove momentum from the mass system. Maximum angular velocities were in the same range as reelout runs with successful reelin runs only in the coplanar cases. To summarize, reelout is feasible without the use of thrusting or attitude control. (Author)
Descriptors : *MECHANICAL CABLES), (*RENDEZVOUS TRAJECTORIES, MATHEMATICAL ANALYSIS), (*SPACECRAFT DOCKING, RENDEZVOUS SPACECRAFT, INTERCEPT TRAJECTORIES, ORBITS, REELS, DIGITAL COMPUTERS, MATHEMATICAL MODELS, EQUATIONS OF MOTION, VELOCITY, TRAJECTORIES, SPACECRAFT COMPONENTS, FEASIBILITY STUDIES, MOMENTUM, CABLE REELS.
Subject Categories : Numerical Mathematics
Spacecraft Trajectories and Reentry
Distribution Statement : APPROVED FOR PUBLIC RELEASE