Classification as a method of searching new designs of joints for mounting wheels and motors units of locomotives

The paper considers a task on a search for new methods aimed at development of patentability-based technical solutions of mounting electric traction motors to bogie frame by creating classifications. In result of the analysis, the authors propose a classification that allows systematizing designs of suspensions of all existing traction drives and axial gearboxes and allows determining possible search areas of new technical solutions. On the basis of the classification the authors have proposed designs of mounting electric traction motors to bogie frame, particularly, in conditions of limited vertical dimensions, suspensions of axial gearbox that provide the alignment of electric traction motor and the axial gearbox, and also new designs of connecting links.

The use of fuzzy logic apparatus in development of expert systems for diagnosing traction electric motors of rolling stock

The paper discusses the development of an expert system for diagnosing electric traction motors of rolling stock. The diagnostic parameters of the electric traction motor commutator-and-brush assembly, being the input linguistic variables of the fuzzy model, were selected with the use of graphoanalytic model. A fuzzy mathematical model and a fuzzy neural network for comprehensive indicator of quality of mechanical machining implementing the Takagi — Sugeno fuzzy inference algorithm were developed. The authors confirmed the practicability and the adequacy of the previously proposed comprehensive indicator of quality of mechanical machining for assessing the technical condition of the electric traction motor commutator-and-brush assembly. The studies carried out allowed creating an element of intelligent expert diagnostics system that enables a comprehensive assessment of technical condition of electric traction motor.