Aerospace Instrument-Making Annotation << Back ON IMPLEMENTATION OF APPROXIMATING METHODS OF INCREASING OF PRECISION FOR THE MAGNETOMETRIC CONVERTERS G.I. Soborov Nowadays it can be noticed that there are a lot of new developments and expan-sions concerning area of application of magnetometric converters (MC) based on various operation principles in aerospace technology. Appearance of new MC configurations supplements and expands a dominating area of development of fluxgate converters. New converters have a high level of microminiaturization that is related with degradation of precision caused, mainly, by sharply expressed nonlinearity of their calibration characteristics (CC). Thus, in order to solve con-tradictions between requirements for miniaturization and precision of MC used in technology of precision magnetic measurements, it is required to use and developed necessary methods of identification and correction of conversion errors. One more important task is use and capability of selecting simple and affordable calibration instruments that excludes the necessity of using complex and expen-sive gages of magnetic induction. A known author’s variant of such solution is carrying out of calibration in the Earth’s magnetic field with known parameters. In this case, it is required to develop calibration and error identification algorithms which take into account the nature of the mentioned calibration method. Solutions for the given tasks shown in this work are based on use of the method of vector conversion by changing of angular orientation of the MC geometric axis relative to the EMF induction vector. In this case, identification of MC errors is based on using a group of methods of CC approximation and algorithms for determination of their parameters by solving equation sets at approximation seg-ments formed in the process of vector conversions. The capability of using meth-ods of polynomial and piecewise-linear approximation as the simplest with re-gard to implementation is described in the work. The obtained mathematical expressions of CC parameters provide the capability of synthesis of programmes for identification and estimation of errors. Consequently, the proposed set of the described calibration and approximation methods gives the capability of decreasing an error from nonlinear calibration MC characteristic simultaneously with de-creasing additive and multiplicative measurement errors. Key words: magnetometric converter, calibration characteristic, parameters of calibration characteristic, gage of magnetic induction, polynomial approximation, piecewise-linear approximation, vector of Earth’s magnetic field induction. Contacts: E-mail: rpkb@rpkb.ru Pp. 18-25.