COMPUTER MODEL OF THE ACTIVE SUSPENSION OF AN AIR-WHEELED MACHINE
The skeleton of a pneumatic wheeled vehicle is simultaneously subject to two external influences: from the heterogeneity of the physical and mechanical properties and unevenness of the track, and from the active suspension system when moving. A computer model, which includes a submodel for solving the equations of the dynamic mode of the system, a submodel for the formation of active suspension effects, and a submodel for generating disturbances from the side of the road in the form of a random path profile with a given correlation function, a unit step, and a sinusoid, is proposed. The parameters of the model are set, the connection between the submodels and the blocks inside them is carried out using the mechanism of the SimInTech program, called "Signals". A submodel for solving equations allows you to obtain the velocities and movements of the elements of the physical model with their subsequent entry into the signal database. Here, the values of the movements of the suspension rod are calculated, taking into account the angle of inclination of the machine frame. The impact blocks from the side of the road profile allow you to simulate all possible traffic modes. For use in various simulation models of vehicle dynamics, a universal block for modeling a random path profile is included, which allows generating a path profile with a spectral density corresponding to a large set of roads of various types. The type of road and the parameters of the type of spectral density of the road profile are set using the appropriate script. The proposed approach is multifunctional, allowing to determine the acceleration and parameters of the vehicle, the effects of a random profile, obstacles or traction. The structure of the complex makes it possible to include in the model and consider active suspension devices of various shapes (hydraulic, pneumatic) and ways to control them.