Факультет "Транспортна інженерія" (раніше ф-т "Механічний")
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ENG: Faculty of "Transport Engineering" (formerly Faculty of Mechanical Engineering)
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Browsing Факультет "Транспортна інженерія" (раніше ф-т "Механічний") by Author "Bas, Kostyantyn M."
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Item Control of Tandem-Type Two-Wheel Vehicle at Various Notion Models Along Spatial Curved Lay of Line(Національний гірничий університет, 2015) Beshta, А. S.; Kravets, Viktor V.; Bas, Kostyantyn M.; Kravets, Tamila V.; Tokar, Larisa A.EN: Wheeled vehicle is considered as a material point under the conditions of non-uniform movement along curved spatial lay of line. Hodograph in a class of spatial lines describes kinematics of a vehicle. A kinetostatics problem of tandem-type two-wheel vehicle is being solved. Equivalent contact dynamics are being determined.Item Dynamic Design of Ground Transport With the Help of Computational Experiment(Magnolithe GmbH, Sankt Lorenzen, Austria, 2015) Kravets, Viktor V.; Bas, Kostyantyn M.; Kravets, Tamila V.; Tokar, Larisa A.EN: Objectives of ground transport (motor transport vehicle) have been considered. Mathematical model of nonlinear dynamics in spatial motion of asymmetric carriage in the form of Euler-Lagrange equations represented as symmetrical block structure in quaternion matrices has been developed. Kinematic equations and partition matrices of external action in which Rodrigues-Hamilton parameters have been applied describe quaternionic matrices.Item Kinetostatics of Wheel Vehicle in the Category of Spiral-Screw Routes(Magnolithe GmbH, Sankt Lorenzen, Austria, 2016) Kravets, Viktor V.; Bas, Kostyantyn M.; Kravets, Tamila V.; Zubariev, Mykola S.; Tokar, Larisa A.ENG: Deterministic mathematical model of kinetostatics of wheel vehicle in terms of different modes of spatial motion in the context of curved route is proposed. Earth-based coordinate system is introduced which pole and axial orientation are determined by the convenience of route description as well as vehicle-related coordinates which pole axial orientation are determined within inertial space with the help of natural trihedral. Turn of the natural trihedral within inertial coordinates is described by means of quaternion matrices in the context of Rodrigues-Hamilton parameters. Rodrigues-Hamilton parameters are in matrix form in direct accordance with specified hodograph. Kinetostatics of wheel vehicle is considered in terms of spatial motion with an allowance for three-dimensional aerodynamic forces, gravity, and tangential and centrifugal inertial forces. In the context of spiral-screw lines deterministic mathematical model of wheel vehicle kinetostatics is proposed in the form of hodograph in terms of uniform motion, accelerated motion, and decelerated motion within following route sections: straight and horizontal; in terms of vertical grade; in terms of horizontal plane. Analytical approach to determine animated contact drive-control forces of wheel vehicle for structural diagrams having one and two support points involving of a driving-driven wheel characteristic is proposed based on kinetostatics equations. Mathematical model of wheel vehicle kinetostatics in terms of spatial motion is constructed on the basis of nonlinear differential Euler-Lagrange equations; it is proposed to consider physically implemented motion trajectories of wheel vehicles in the context of spiral-screw lines; hodograph determines spatial displacement; Rodrigues-Hamilton parameters determines spatial turn; Varignon theorem is applied to identify components of drive (control) force. The obtained results make it possible to solve a wide range of problems connected with dynamic design of wheel vehicles involving controllability, and estimation of dynamic load of both system and support surface.Item Mathematical Model of a Path and Hodograpf of Surface Transport(Katowice, Poland, 2014) Kravets, Vladimir V.; Kravets, Tamila V.; Bas, Kostyantyn M.; Tokar, Larisa A.ENG: With the increase in speed of wheeled vehicles, such lead nations follow their research on determining new forms of transit curves. Transit curves proposed from the viewpoint of heuristic or criteria ideas should meet true guide path of transport vehicle at both constant and alternative speed. It is proposed to form a plan, longitudinal and cross-sectional profile of highways in junctions and turns in the form of ruled surface (Shukhov’s surface) which components are in anormal plane of true trihedr on of motion path and guide path selected as a part of spiral line covering nine variable parameters determined on required boundary conditionals imposed on the curve value too if motion models are specified. It is set as specified both location and speed of a vehicle during input/output moments within considered curved highway area. It is required to determine hodograph corresponding specified mode of the vehicle movement along the highway considered as a motion trajectory. Hodograph of vehicle movement dependingupon various modes – accelerated, decelerated, with constant speed, injunctions and turns, within straight and curved areas, while sloping and rising can be synthesized in a class of proposed spiral lines (guidepaths) corresponding to true, undisturbed trajectories of a vehicle.