the forecast of chemical accumulators characteristics of power system of spacecraft

Paper number

IAC-08.C3.2.10

Author

Prof. Kostiantyn Bezruchko, National Aerospace University "Kharkiv Aviation Institute", Ukraine

Coauthor

Dr. Albert Davidov, National Aerospace University "Kharkiv Aviation Institute", Ukraine

Coauthor

Dr. Mykola M. Slyunyaev, Yuzhnoye State Design Office, Ukraine

Coauthor

Mr. Victor Frolov, Ukraine

Year

2008

Abstract

Power-supply system is one of the key units for the majority of rocket-space objects, providing work of almost all devices, which are on spacecraft board.

Modern power-supply systems are built on the schema of direct transmission of energy from generator to load, but their composition and embodiment are differing subject to their application and specificity of spacecrafts. Functionally power-supply systems consist of generation subsystem, accumulation subsystem and service equipment.

Majority of modern spacecrafts as exploitable so again developing have operation life within the limits from 1 to 5 years, in some cases their resource run up to 10…15 years.

Progress of such resource, as rule, is achieved due to chemical battery capacity increasing. It results in spacecraft power-supply system rise in the cost.

Direct determination of the resource of chemical accumulator requires great financial and time costs. In this connection there is a critical problem of certain determination of accumulator state parameters in any point of their operation time and further forecast of their characteristics.

Using mathematical models which describe time variation of accumulator characteristics it was developed the method of forecast of chemical accumulator characteristics on parameter values of their current condition.

Using developed methodic, data on accumulator current condition and history of its functioning it is possible to evaluate quantitatively the influence of degradation processes on such accumulator characteristics as internal resistance, discharge voltage, capacity of the accumulator, self discharge, discharge time, etc. and also accumulator capacity changing during its operation time.

Abstract document

IAC-08.C3.2.10.pdf

Manuscript document

IAC-08.C3.2.10.pdf (🔒 authorized access only).

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