Fuzzy Model of a Nonlinear Mechatronic System

The paper presents a method of designing a fuzzy model for a nonlinear mechatronic system described only by input/output relations. The fuzzy model of the system is constructed on basis of the system's measured input/output data without the necessity of preliminary knowledge of its internal structure and parameters. In the first part of the paper we describe the method of the fuzzy model design in the simple example of third order nonlinear system, in the second part this method is applied to a real nonlinear dual axis mechatronic system. Important simulations and experimental measurements have been realized which confirm the rightness of the proposed fuzzy modelling method, which can also be applied for other nonlinear MIMO systems.