Nechyporuk O. Information technology for diagnosing multilevel technical systems

The purpose of this research is solving of the actual scientific and applied problem of creating scientific bases for building models, methods and information technology for diagnosing complex technical systems with multilevel structure, which will identify combinations of hidden faults that lead to their consequences at different levels.The occurrence of combinations of individual faults in the imposition of their consequences makes it impossible to solve the problem of diagnosing a multilevel technical system by traditional methods and gives it a combinatorial character. An information technology for diagnosing multilevel technical systems, invariant in terms of their physical nature, structure and technical parameters, has been created, which is able to identify combinations of faults in the conditions of overlapping the impact of each of them on the value of object characteristics. A generalized logical model of diagnosis and its separate forms have been developed, which reflect the causal relationships between typical combinations of faults and the corresponding changes in the values of the controlled parameters of a multilevel technical object. A method for transforming logical models into combinatorial forms, which are reduced to the canonical form of systems of inequalities of linear and nonlinear structure, has been developed. A method for solving systems of combinatorial inequalities with linear and nonlinear structure, adapted to models of problems of diagnosing multilevel technical objects, has been developed. Information technology for diagnosing multilevel technical objects has been developed, which allows to identify combinations of faults taking into account the consequences of the influence of each of them on the values of controlled parameters of the object. An expert system for diagnosing technical objects with a multilevel structure has been developed, which is able to identify combinations of faults that occur at the time of diagnosis, taking into account the effects of each of them on the value of controlled parameters of the object. Implemented information technology for diagnosing complex technical systems with a multilevel structure in the form of software and introduced it into production. Information technology, containing a set of methods, algorithms and programs, provides an opportunity to solve problems of diagnosing complex technical systems at a new qualitative level, which increases the reliability of decision-making in conditions of uncertainty of the consequences of each failure, which is due to changes in controlled parameters diagnosing from a set of simultaneous faults.