Algorithm for searching for defects such as “short circuit” in the electrical circuits of the cable network of a complex automated system

Аuthors

Baranovsky A. M., Musienko A. S.^*, Shulika N. R.

Mlitary spaсe Aсademy named after A.F. Mozhaisky, Saint Petersburg, Russia

*e-mail: vka@mil.ru

Abstract

In complex automated control systems (ACS), specifically in the control systems of the space-intended rockets (SIR) singular defects manifest themselves in the form of short circuit in the electric circuits. The authors propose a new search algorithm, which reduces the number of search steps through a combined strategy of partitioning the initial set of possible defects.

The strategy being proposed includes the principle of half-partitioning and sequential enumeration of possible defects. It differs from the well-known strategies, such as exhaustive search, half-partitioning and mixed strategy, allowing not only detecting the presence of a defect, but identifying specific circuits that communicate with each other with a minimum number of checking steps as well.

The obtained research results of the study can be employed in the development of monitoring devices for electrical equipment of ground and on-board systems, which ensusre monitoring and detection of defects during the preparation of the SIR for launch. Both external and internal factors may cause changes in the technical condition of electrical circuits during operation. Defects, especially short circuits between the circuits, are especially dangerous and do not allow for he safe operation of the products.

The purpose of the study consists in reducing the number of check steps to detect the fact of the short circuit absence and indicate the circuits numbers that have a short circuit between them, in the event of a short circuit being detected in electrical circuits.

The authors propose to employ original heuristic algorithm for generating sets of tested circuits to achieve this goal. This algorithm allows generating a terminal minimum set of pairs of circuits with supposed presence of the short circuit. This approach reduces the number of necessary pairwise checks at the stage of sequential enumeration of the checked pairs of circuits.

In conclusion, the proposed strategy for the single defects searching in electrical circuits is the best one, since it requires fewer elementary tests to monitor and search for the short circuits. Such strategy realization is relatively simple with modern control tools based on computing and switching devices. The assumption of a single short circuit is acceptable for normal operating conditions, but in case of deviations a repeated round of checks is necessary.

Keywords:

electrical circuits, model, technical condition monitoring, complex technical systems, short circuit, defects, failures

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