Method for detecting the loss of stability of the movement of tractors when towing a trailer or a coupled unit

BACKGROUND:Currently, combines and tractors, being the most energy-intensive transport technological machines for agricultural purposes, largely determine possibility of transition to an efficient environmentally friendly economy, also provide technical aspect transformation agro-industrial complex into leading sector countrys industry. One sources dynamic loads in units subsystems tractor equipment are self-oscillating modes.
 AIMS:Study conditions occurrence processes design wheeled trains development methods increase handling safety their movement by means reducing galloping yawing tractor-tractor when towing heavy loads.
 METHODS:It has been established that due coupling oscillations along longitudinal displacement a truck trailer with vertical center mass pitch angle tractor, auto-oscillatory mode occurs interaction zone elastic wheel solid surface, same self-oscillation will occur mentioned degrees freedom. Moreover, it is possible specify sequence modes different zones train design.
 RESULTS:First, self-oscillations excited contact patch surface complete slip occurs, then body begin after occur. Folding associated translational motion centers, which lead emergence mode, both partial full tire surface. Since each wheels at random times, folding be chaotic.
 CONCLUSIONS:The practical value study lies using proposed identify danger promising types machinery.