CALCULATION FOR biaxial wheeled vehicle to rollover stability
The concept of stability of the system is connected to its ability to return to equilibrium after the disappearance of external influences that brought it out of this state. If the system is unstable, it will not be returned to the state of equilibrium, and either removed from it, or performs oscillations around it with unacceptably large amplitudes. Defining the parameters of the wheel vehicle, ensuring sustainable, controlled movement, is one of the primary design goals. Resistance is the set of properties of the wheeled vehicle, characterized by its ability to maintain a given motion direction in the external environment, trying to deflect it from this direction. Trajectory and road-holding ability, and resistance to overturning are distinguished. Trajectory stability is characterized by the ability to maintain the direction of the center of mass of the wheeled vehicle, and road-holding ability is the ability to maintain the orientation of the longitudinal axis of the wheeled vehicle symmetry. The first is estimated with lateral displacement of the center of mass of the desired path, but the second is azimuth. If it occurs the lateral wheel slip of one or all axles, so it is a limiting case of stability loss that is called skid. Another limiting case of stability loss is tipping. Overturning is a wheeled vehicle turning in a transverse or longitudinal plane with separation of respective wheels from the support surface. In the first case there is a cross overturning, while the second - a longitudinal (more rare). Of all types of stability loss of the wheeled vehicle the most dangerous according to the severity for humans, vehicles and road facilities is overturning. Therefore, in this paper the comparative study of functional relationships between the parameters of the vehicle and the support surface is a measure of the static and dynamic stability of the vehicle against lateral turn-over published to date to identify the most accurate having novelty and versatility.