The Estimation of the Influence of Semi-Trailer Wheel Activation on Traction and Dynamic Properties of Road Trains

For the development of various sectors of the economy and ensuring defense capability, it is important to have an efficient delivery system for indivisible bulky and heavy items, the weight of which can reach hundreds of tons. These goods are transported on public roads and off-road by special road trains, but their use in difficult driving conditions is significantly limited by insufficient trafficability. Better trafficability of road trains can be achieved by increasing the number of drive wheels through the addition of an active semi-trailer link. To compare the traction-and-dynamic characteristics of road trains with the passive and active semitrailer, a mathematical model of the straight line dynamics of a two semi-trailer truck is created. The results of theoretical studies of a road train moving uphill with different combinations of semi-trailer drive wheels are given. The synthesis of a rational control law for a semi-trailer drive system is identified as one of the directions for further research.

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