General tolerance for mechatronic system

Abstract

A mechatronic system results form the integration of several components from different domains. The system's behavior is sensitive to the values of its parameters and variables. Be it small or large, a variation in these values can significantly influence the overall functioning of the system. To provide a high quality product, the fluctuations between actual and target values of parameters should be in specified tolerances. These tolerances incorporate geometric and non-geometric parameters, which are integrated to make the mechatronic system. Furthermore, the variation margin of variables should be computed to evaluate system performance. In this paper, we propose a new methodology based on the variational approach to quantify tolerances of the mechatronic systems with uncertainties in some of their parameters. This method is based on combining Modelica modeling and mathematical modeling. The proposed methodology is applied in the case of a DC motor. The results show that the developed method is practical and helps in specifying tolerance in a mechatronic system.