Abstract
The paper presents a model of the angular positioning process of cuboidal objects with the use the system of two oblique friction forces fields created by conveyor belts. In this model, the contact surface of the object with conveyors was divided into discrete elements. To describe the reaction of the frictional forces of discrete elements in the plane motion, the models of LuGre, MSC Adams with or without the Stribeck effect were used. Numerical tests show that due to the implementation of the positioning process at high sliding velocities, the object transition between the friction fields does not cause appearing the Stribeck effect. The disappearance of this effect is caused by disclosure of nonlinear phenomena, break-away force and stick-slip, which cause a drop in the friction limit force value, when the external force breaking the static friction builds up at high velocity.In addition, based on the analyses of numerical test results, determined recommended parameters of the conveyor belts motion, allowing to minimize the value of the final rotation angle of the object after passing through a system of two oblique friction force fields.
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