A methodological approach to determining the survivability of complex technical systems for military purpose in combat conditions
DOI:
https://doi.org/10.54858/dndia.2024-20-30Keywords:
probability of failure-free operation, probability function, controllable means of destruction, abnormal situation, operable state, logic algebra functionAbstract
The article provides a methodical approach to the formation and development of possible scenarios for the development of abnormal situations during tests of controlled means of destruction by describing their structure and functioning based on the logic-probability theory.
To form a list of possible abnormal situations, a functional-morphological decomposition is carried out with preference given to the functional feature, the consequence of which is the distribution by groups of the causes of malfunctions and damages that lead to emergency situations. A logical-probabilistic method is used to assess the working state, the essence of which is that the structure of the object under study is described by the algebra of logic (FAL) function, and the quantitative assessment of the working state – by methods of reliability theory. As a result of such a transformation, the probability function will already act as the probability of the truth of FAL. At the same time, the structure of the researched object is described by the function of algebra of logic, and the quantitative assessment of the working condition is described by the probability function. At the same time, it is convenient to represent the function of logic algebra in disjunctive normal form (DNF). Each DNF conjunction represents a path leading to a dangerous condition.
The selection of the conversion algorithm is proposed taking into account the complexity of the calculations and the requirements for the accuracy of the results. It is shown that the orthogonalization algorithms, the recurrent algorithm, and the path extension algorithm are the most suitable for practical purposes. For software implementation, the most convenient is the recurrent algorithm, which is an acceptable compromise between simplicity and error of the result.
Possible scenarios of the development of emergency situations were considered under the condition that their occurrence is due to the failure of one or more component parts of the means of destruction or a violation of the connections between them. This approach makes it possible to single out the components that have the greatest impact on performance.
Analysis of the behavior of the controlled means of damage in normal flight and in the event of one or more failures makes it possible to determine the danger zones during flight tests.
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