ARTICLE:

• RADIATIVE PROPERTIES IDENTIFICATION BASED ON INVERSE PROBLEMS TECHNIQUES  download article

O. M. Alifanov
Moscow State Aviation Institute, Moscow, Russia

Aleksey V. Nenarokomov
Professor of Mechanical Engineering, Department of Space System Engineering, Moscow State Aviation Institute, 4 Volokolamskoe Shosse, Moscow, 125871, Russia

ABSTRACT

The present paper considers the extreme method for solving an inverse problem. Due to mathematical ill-posedness of this problem the question of choosing a method for constructing a minimized sequence of approximations and that for sampling a required solution from it is critical. It is shown that for this purpose we can successfully use the specifically developed algorithms based on the conjugate gradient methods. Stopping of the corresponding iterative processes, providing stability of the problem solving, should be perfomed by means of appropriate matching of the criterion functional value and the total measurement error. The accuracy of the solution of inverse problems obtained by the suggested algorithms is discussed. Evaluation of the technique suggested has been made in determining the integral emissivity factor ε and the absorbtion coefficient A_s of the spacecraft surface. The results obtained directly in orbit conditions are discussed.

 download article

« Previous article         Next article »