СALCULATION OF RELIABILITY OF THE STEPLESS ROTATION MECHANISM OF AN INDUSTRIAL TRACTOR WITH A TRACKING CONTROL SYSTEM
Keywords:
reliability, time to failure, service life before decommissioning, stepless rotation mechanism, tracking control systemAbstract
The authors of the article determined the level of reliability of the stepless differential rotation mechanism with a tracking control system (SDRMTCS), achieved at the stage of its design and manufacture. Based on the results of the analysis of the structure of this mechanism, the concept of a failure of the SDRMTCS is defined. A mathematical model of reliability SDRMTCS as restoring the products obtained graph States based on a number of assumptions, including the assumption of stationarity, the lack of follow-through and the ordinary process of functioning of the product. When determining the parameters of the mathematical model of the SDRMTCS, statistical data on the failure rates and failure times of the component parts of the product, obtained during the testing of analog devices, were used. The product readiness function is determined by solving the system of Kolmogorov differential equations under the given initial conditions. The readiness function is calculated taking into account the loads that occur during the operation of the SDRMTCS as part of a mobile object, by introducing a correction factor for the failure rates of the elements of the product. Using the availability function, the value of the failure rate (failure rate) and the value of the service life (durability indicator) are determined. Both reliability indicators meet the requirements of the task. The peculiarity of the above calculations of the reliability of the SDRMTCS is that they focus on constructive, rather than on production and operational failures. This helped to ensure literacy adopted at the design stage SDRMTCS decisions, including decisions on the harmonization and standardization of parts, assemblies, decisions about the use of highly reliable components and assemblies. This is justified not only by increasing the reliability of the product, but also by reducing its cost.
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