PROCEDURE OF OPTIMAL LOGICAL DIAGNOSIS ALGORITHM CONSTRUCTION
The PURPOSE of the paper is to create an optimal logical algorithm based on functional diagram analysis for the technical diagnosis of industrial frequency converters. METHODS. An analytical criterion of diagnostic algorithm optimality is formulated as a minimality of average costs for determining one technical state of the object of diagnosis. An algorithm is developed for the solution of the problem of finding a sequence of elementary diagnostic tests of industrial frequency converter functional blocks, which satisfies the formulated criterion. The main stages of solving the problem are identified: the analysis of the functional diagram of the device being diagnosed for the expediency of diagnostic tests of functional blocks in various situations; selection of the block to be tested first, determination of tree parts representatives, formation of possible sequences of elementary test execution in configuration branches, identification of sequences characterized by minimum average costs of implementation; synthesis of the configurations of optimal algorithms from previously determined composite parts. The developed procedure is implemented in the high-level programming language Object Pascal by means of Delphi integrated environment. RESULTS AND THEIR DISCUSSION. The paper presents the procedure of configuration construction for the optimal logical algorithm of electrical equipment diagnosis. A specialized application FC_OPTIM has been created in the framework of this procedure program implementation as applied to industrial frequency converters. Two configurations of logical diagnostic algorithms satisfying the criterion of optimality have been constructed. One of the received configurations corresponds to the MPT-algorithm of frequency converter diagnosis developed by the author of the present article. The algorithm is used when structuring the knowledge base of an expert complex for adjusting frequency converters FC3. CONCLUSIONS. An optimal logical algorithm has been developed for the technical diagnosis of industrial frequency converters. It is based on the analysis of the functional diagram.