Accession Number : AD0615857

Title :   SURVEY OF WORKS CARRIED OUT IN COMPUTATIONAL CENTER OF ACADEMY OF SCIENCES OF USSR ON THE THEORY OF OPTIMAL CONTROL OF SPACECRAFT,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Moiseev,N. N. ; Lebedev,V. N.

Report Date : 25 MAY 1965

Pagination or Media Count : 28

Abstract : Two approaches to the solution of variational problems of control of spacecraft are demonstrated. Problems using the principle of the maximum were discussed, and a very high accuracy of calculations was obtained. However, it requires great expenditure of machine time and requires a good first approximation. All calculations were carried out with very high degree of accuracy and in this sense the given results have a 'final character'. Methods of dynamic programming require a considerably smaller number of 'machine hours.' For their use there is no necessity to have a good first approximation. However, they are inferior to classical methods in the sense of accuracy. Schemes of only the first order of accuracy, equivalent to the scheme of integration of Euler were considered. Only now has there begun systematic investigation of finite difference schemes of higher order of accuracy.

Descriptors :   (*SPACECRAFT, CONTROL SYSTEMS), (*OPTIMIZATION, CONTROL SYSTEMS), ORBITS, CIRCULAR ORBITS, CALCULUS OF VARIATIONS, DYNAMIC PROGRAMMING, BOUNDARY VALUE PROBLEMS, SOLAR SAILS, USSR

Distribution Statement : APPROVED FOR PUBLIC RELEASE