| Abstrakt: |
In the modern stage of development of animal husbandry, the means used for the preparation and supply of feed mixtures are becoming increasingly common. These facilities combine the operations of loading, grinding, mixing, transporting, and dosed feed distribution. The purpose of this study was to assess and ensure the reliability of the operation of the means for preparing and distributing feed using logic-probabilistic modelling of failures of the feed mixture unloading mechanism as a subsystem of the "Man-Machine-Environment" technical system. In the study, logical-probabilistic modelling of the means for preparing and distributing feed was used 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 analysed. It was proved that to prevent the failure of the "man-operator" component of the system, it is necessary to ensure sufficient qualification of the personnel, foresee the possible occurrence of errors and ensure their timely elimination. It was confirmed that 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. Furthermore, it was established that the probability of failure of the mechanism will be less important under the condition that the probability of elimination of failures in case of insufficient qualification of the operator and in the case of failure of drive parts will be 0.2. It was found that 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 changes in conveyor tension and the impossibility of adjusting conveyor tension, while 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 drive parts, conveyor belts. [ABSTRACT FROM AUTHOR] |
