Methodology for Determining the Technical Condition of Automotive Vehicles Using an Automated Control System and Diagnostics at Low Temperatures

Efficiency of the logistics system (LS) of an agricultural enterprise (AE) is determined by the number of outings of motor vehicles (MV) for the required period of time. It is proposed to increase the efficiency of the LS system in low temperature conditions using a technique for determining the technical condition of vehicles using an automated monitoring and diagnostic system (AMDS) in low temperature conditions. A methodology for forming the appearance of an AMDS MV, a model of an MV using the proposed method of checking an MV using an AMDS, as well as an algorithm for checking the significance of the influence of the method of checking an MV on the number of flights performed by AE must be developed to justify it. A flow diagram of the methodology, which reflects the relationship of the initial data with the developed (used) method of substantiating the appearance, model and algorithm, as well as the logical organization of the methodology itself for determining the technical condition of the MV is presented. The main components of the developed methodology for determining the technical condition of a vehicle using AMDS in low temperature conditions are discussed in detail: the method of forming the appearance of an AMDS MV based on AVR microcontrollers for low temperature conditions; model of LS of AE in conditions of low temperatures using the method of checking ATS with AMDS; an algorithm for checking the statistical significance of the influence of the proposed method of checking vehicles in low temperature conditions using an automated monitoring and diagnostic system on the number of flights performed by agricultural enterprises; a method for checking vehicles using AMDS in low temperature conditions. The adequacy was checked and the properties of the SHP LS model were investigated under low temperature conditions using the method of checking ATS with AMDS. Evaluation of the effect of using the proposed method showed the possibility of increasing the number of flights from 10 to 20%. The hypothesis about the significance of the influence of the proposed method on the number of flights performed by AE in low temperature conditions for a given operating time was confirmed.