Lykhodii O. Increasing of maneuverability of two-link articulated vehicle with active turning of semitrailer

The thesis is devoted to solve the problems to rise maneuverability of two-link articulated vehicleat the expense of improvement of calculation methods taking into account functional links between active turning control system of semitrailer and curvilinear motion of a vehicle, simulation modelling. The subject of research is working processes occurred in active turning control system of trailing unit of articulated vehicle. Purpose of the thesis is to increase manoeuvrability of two-unit articulated vehicle with active turning control system of trailing unit at the expense of summing up of the methods of engineering developments of active turning control system. Research methods are founded on mathematic (analytical and simulation) modelling in accordance with fundamental laws of theoretical mechanics, motor car theory, vector analysis and matrix calculation with further implementation like computer programmes developed in the medium of mathematic pack MatLab. There was proposed the methods of determining maximal values of turn angles of controlled wheels of semi-trailer and developed algorithm of system control allowed to increase considerably manoeuvrability of articulated vehicle. Simulation modelling of dynamic motion of articulated vehicle considerably shortened time for calculations thanks to combination of the methods of classical mechanics and vector calculation with Frobenius method. Scientific novelty: in the first time it was found the interaction between the angles of combining articulated vehicle and the angles of wheel turning of its trailing unit by manoeuvrability criteria; it was found the interaction between parameters of working processes, which take place in the active turning control system of semi-trailer and parameters of curve movement of articulated vehicle; the further development was given to the design concept of controlled axles of trailing unit of articulated vehicle. Materials of the thesis are accepted for use in design department of PLC "Verkhnodniprovskyi auto repair plant" and private enterprise "Kharkivskyi centre of after accident protection "EXPRESS-SERVICE".