Accession Number : AD0606019

Title :   LOW-THRUST VEHICLE GUIDANCE STUDY: VOLUME II, PARTS II AND III.

Descriptive Note : Final rept.,

Corporate Author : AVCO CORP WILMINGTON MASS RESEARCH AND ADVANCED DEVELOPMENT DIV

Personal Author(s) : Miller,James S. ; Dahlen,John M. ; Magee,Robert J.

Report Date : AUG 1961

Pagination or Media Count : 128

Abstract : This report considers various aspects of the guidance of a low-thrust vehicle. The report is divided into three parts: theory, guidance system implementation, and space sextant feasibility demonstration. The first part on theory presents a guidance scheme suitable for use on an arc-jet vehicle in an earth to lunar orbiting mission. Numerical results are presented which demonstrate the capability and performance of this scheme. The second part presents implementation schemes for a self-contained guidance and attitude control system for a lunar reconnaissance mission. The system uses a precise automatic space sextant supported by two mechanical degrees-of-freedom as a primary source of guidance and attitude control information. The third part reports on a laboratory experimental program to demonstrate the feasibility of the space sextant. Included are a physical description of the instrument and complete error analysis. (Author)

Descriptors :   (*NAVIGATION COMPUTERS, SPACE PROBES), (*CELESTIAL GUIDANCE, INSTRUMENTATION), (*SPACE PROBES), CELESTIAL GUIDANCE), (*SPACE NAVIGATION, SPACE PROBES), LUNAR PROBES, ARC JET ENGINES, THRUST VECTOR CONTROL SYSTEMS, TRACKING TELESCOPES, ATTITUDE CONTROL SYSTEMS, GYRO STABILIZERS, GIMBALS, DIGITAL COMPUTERS, SEXTANTS, INFRARED DETECTORS, NUMERICAL METHODS AND PROCEDURES, RELIABILITY, OPERATION, FEASIBILITY STUDIES

Distribution Statement : APPROVED FOR PUBLIC RELEASE