science-review.ru
Scientific journal
Scientific Review. Technical science
ISSN 2500-0799
ПИ №ФС77-57440
ISSN 2500-0799
ПИ №ФС77-57440
MATHEMATICAL MODELLING OF DYNAMICS OF AN ELECTROMECHANICAL BRAKE DRIVE
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Research of dynamics of an electromechanical brake drive with the executive mechanism in the form of planetary roller screw (PRS) is conducted. Two transitive modes were investigated: the first mode - a mode of uncontrollable running start from acondition of rest before occurrence of axial force on rod PRS; the second - increase in axial force at rod PRS from zero to the maximum established value. The nonlinear differential equations of mathematical model of a drive are solved by a method of Runge-Kutta on the computer by means of specially developed software in the environment of Delphi. Schedules of dependences of axial force on rod PRS from time are constructed at various values rigidity, friction and weigth-dimensions drive parametres. Character of influence of each of these parametres for the period of operation of brake system and axial force on a rod is established, the comparative analysis is carried out. By results of the spent dynamic analysis the electromechanical brake drive has shown higher technological level in comparison with electrohydraulic and hydromechanical drives by the major criteria of efficiency of braking - time of operation and axial force on a brake block. Ways of the further increase of these characteristics are specified.