Abstract
For stable computation of stiff plant model carrying both of quick and slow dynamics, a graph oriented approach to analysis of nonlinear block diagram is developed. Since this method can generate the minimum order computational model from complicated block diagram by simple procedure, stable dynamic simulation using implicit formula can be put to practical use. In addition, it can produce computational models for transient analysis and steady state analysis, and linear state model in unified scheme. Using the proposed method, the simulator Xsim which provides interpreter generating data of block diagram from mathematical equations and user defined function, analysis functions, and output functions displaying trend graph and making a text file of linear state space model for MATLAB, has been manufactured experimentally. By simulation of once through sliding pressure boiler using high order model, validity of the proposed method is established.
