Designing trailer brake system includes calculation of brake system parameters and selection of brake assembly. The brake system parameters and the calculation of trailer brake system must be defined before creating the software tool. Development of software tool for calculation and selection of trailer vehicle brake systems enables simplification of the designing process. The software tool is written in the Python programming language with a graphical interface made from Tkinter library elements. It is designed for calculating brake systems of trailers with a central axle in accordance with the valid regulations of the Republic of Slovenia. Based on input parameters, program returns output parameters that confirm or refute the selected brake assembly from the supplier's catalog. Trailer brake systems can be homologated in accordance to StVZO or Commission Delegated Regulation (EU) 2015/68.
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