CONTROL-SYSTEM ANALYSIS USING MATHEMATICA AND A GRAPHICAL USER-INTERFACE

An environment has been developed in which the computer algebra softwa re Mathematica is used for the analysis of dynamic systems with models constructed through the graphical user interface of the simulation so ftware SIMULINK. The SIMULINK models are passed to Mathematica through MATLAB and MathLink programs under the control of a simple graphical user interface. An application is described in which block-oriented no nlinear systems for analysis by multidimensional transforms. Mathemati ca procedures are used to determine the multidimensional transfer func tions that relate the system outputs to the system inputs and these ar e used to obtain the time responses and the harmonic responses of the system. The method is illustrated for a feedback control system with a saturation characteristic in the forward path.