ANALYSIS OF METHODS AND MODELS FOR STUDYING VEHICLE SUSPENSION SYSTEMS

The design of the car's suspension has the greatest impact on its performance properties: smooth ride, stability and handling. Increasing the smoothness of the ride provides comfortable sanitary conditions in the driver's and passengers' seats. As a rule, high smoothness of the ride can be achieved by reducing the rigidity of the elastic device and the damping coefficient of the shock absorber and, accordingly, increasing the suspension travel. Therefore, it is important to identify the disadvantages of different types of suspensions, classify them and further study their properties. In the development of technical solutions for the elements of the suspension systems of military vehicles and methods for studying the processes and states of operation of the suspension systems, there are a number of problems that need to be solved. This is the absence of an orderly system approach that comprehensively describes the process of choosing technical solutions for these elements based on the formulation of mathematical models describing processes and states for the synthesis of the structure and the selection of parameters. During the analysis, it was found that the existing mathematical models of processes and states are sometimes either unreasonably simplified or too cumbersome. An analysis of methods and models of research of car suspension systems has been carried out to determine the advantages and disadvantages of different types of suspensions. The analysis of suspensions (double-link, multi-link, adaptive, dependent, semi-dependent) was carried out on the following grounds: simplicity, compactness, reliability, noise and vibration insulation, controllability, the possibility of installing a drive axle, cheapness, cheap maintenance. They were classified as mechatronic systems: passive suspension systems, adaptive suspension systems, suspension systems with the ability to quickly adjust damper characteristics, slow-acting suspension systems, fully active suspension systems The advantages and disadvantages of different types of suspensions are determined, their classification as mechatronic systems are necessary for subsequent modeling of operation and determination of operational properties. Keywords: car suspensions, suspension systems, mechatronic systems, smoothness, research models.