Boboshko O. Scientific bases of increasing the indicators of motor vehicle maneuverability

The thesis is devoted to the solution of the actual scientific and applied problem of increasing the technical level of wheeled motor vehicles by improving their maneuverability properties. The system approach to assessing the maneuverability of wheeled vehicles and their properties has been further developed. The theory of making a turn by front directive wheel vehicles and all directive wheel ones has been improved. For the first time, the correlation of the front and rear axled wheel slip angles and the road responses affecting on these axles has been obtained. The control coefficient has been proposed as a criterion for the vehicle ability to negotiate a road bend. The parameters of making the maneuver of crablike movement by a vehicle have been determined during steering the front and rear wheels in one direction and at the same angle. The rational parameters of the process of wheeled vehicle dynamic control have been determined by steering the directive wheels in the direction of sidewise skidding in the tracking and braking conditions. The theory of making a turn by a wheeled motor vehicle in a dynamic condition has been further developed and different kinds of turnings have been defined with it. The principal thesis scientific issues, development results and recommendations have been phased in and applied at the scientific institutions. The most important result is the introduction of the obtained mathematical models of wheeled vehicles' maneuvering during making the both the turn and the maneuver of crablike movement. The proposed criteria for assessing readability and stability give an opportunity to model maneuverability properties of wheeled motor vehicles in full compliance with the up-to-date performance standards at the design stage.