چكيده به لاتين
The rollover of vehicles is a very important factor in accidents and damages to humans and vehicles. In heavy vehicles and trucks, respect to higher weight and the possibility of lateral displacement of the center of gravity due to the displacement of rigid load or fluid in the maneuvers, it has increased the fear of rollover in these cars compared to passenger cars. With respect to the structure of heavy vehicles, rollover analysis is a important issue, and many researchers in the field of vehicle suspension tend to discuss how rollover happen or maintain stability. Suspension system is one of the most important systems of the car. thus, the design and implementation of an efficient suspension system will provide comfort and safety for the occupants in different maneuvers. Most new efficient suspension systems are adaptive and controllable. The purpose of this research is to design a controller with the aim of improving the control of the air suspension to improve the rollover stability of the 3-axle truck. In this research, modeling and simulation of the vehicle is performed and finally, by controlling the parameters of the air suspension and thus controlling the height of the sprung mass, the vehicle rollover stability is improved up to 5%. Also, the qualitative improvement of ride comfort according to limitation of roll angle is considered in this research. In addition to the complete modeling of the vehicle, all the controllable parameters can be controlled with minor changes in the model. On the other hand, in addition to the maneuvers analyzed in this study, numerous other maneuvers can be analyzed.
