Parametric evaluation of the technical object suitability based on analyze the quality of its maintenance and use taking into account the initial conditions

Bialystok University of Technology, Faculty of Mechanical Engineering, Wiejska 45C, Bialystok 15-351, Poland

^* Corresponding author : r.gradzki@pb.edu.pl

Abstract

In this paper, the comparison of three various technical objects (engines of public transport buses) exploitation research for different initial conditions are presented. Object researches were carried out in 2012 and then repeated in 2013. Gathered operational data is presented in three sets (1 – concerning object, 2 – concerning driving conditions, 3 – concerning driver, where set 1 is the collection of diagnostic information D_k, and sets 2 and 3 are the information about object environment U) in form of conventional points (experts numerical assessments). Relation between point information of object and point information of environment was described by coupled equations of state (describing relations between operation condition and technical condition including initial conditions for each analyzed exploitation period). That method allows to determine parameters of technical condition aT and operation condition a_R and next, from the course of a_T parameter, set of parametrical damage m_T(t) and from course of parameter a_R – set of momentary damage a_R(t). Thus it is possible to evaluate exploitation, technical and operation conditions of each object (bus engine). Received reliability parameters allows to properly control exploitation and service of particular objects and set of objects (fleet of buses) and its elements.