Machinery & Energetics (Feb 2023)
Logical-probabilistic model of the reliability of means for preparing and distributing fodder
Abstract
Countries with a developed agricultural sector of the economy use modern advances in industry and computer technology in precision animal husbandry. At the current stage of animal husbandry development, both in global practice and in Ukraine, for the preparation of fodder mixtures, means for preparation and distribution of fodder are becoming more and more widespread, which combine the operations of loading, grinding, mixing, transportation and dosed distribution of fodder mixtures. The purpose of the presented article is to assess and ensure the reliability of the operation of the means for preparing and distributing fodder due to the logic-probabilistic modeling of failures of the feed mixture unloading mechanism as a subsystem of the "Man-Machine-Environment" technical system. The results of theoretical and experimental research are a continuation of previous work and are aimed at increasing the efficiency of use and ensuring the reliability of machines and equipment for animal husbandry. The obtained results of theoretical and experimental studies of reliability based on logical-probabilistic modeling of means for preparing and distributing feed as complex technical systems depending on the influence of the components "man-operator", "machine", "environment". The shortest paths of failures and the minimum cross-sections of their prevention for the research objects were analyzed. In order to prevent the failure of the human-operator component of the system, it is necessary to provide sufficient qualification of the personnel, foresee the possible occurrence of errors and ensure their timely elimination. In order to prevent failures of the feed mixture unloading mechanism, it is necessary to timely control and adjust the condition of parts during operation and when restoring performance. It has been established that the probability of failure of the mechanism will be less important, provided that the probability of elimination of failures due to insufficient qualification of the operator and failure of drive parts is 0.2. An increase in the probability of failure of the operator under the condition of insufficient qualification from 0.5 to 0.9 will lead to an increase in the probability of failure as a result of a change in the conveyor tension and the impossibility of adjusting the conveyor tension, and at 0.9 the probability of failure of the mechanism will be 0.046. The practical significance of the results lies in the possibility of investigating the probability of failure of the feed mixture unloading mechanism based on the reliability of the components of the means for preparing and distributing feed, including the hydraulic cylinder, drive parts, and conveyor belts
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