Transient process models for use in trainer-simulators based on approximating static function
Design of mathematical models is the key point in software simulator creation (simulators that imitate the software part of the operator’s automated workplace). A method of creating models by approximating dynamic characteristics obtained experimentally for use in designing simulators is described in the article. The method applies nonlinearity of an object related to static and dynamic characteristics. The method also provides a simple procedure of creating and using models. These models can only be used in simulators as their precision is usually 10-15 %. The proposed method based on dynamic characteristics approximation in time intervals limited by static polynomial functions whose coefficients are calculated by transient processes generated by changes in control and perturbation values. Such characteristics as a steady state value of the output technological parameter, the settling time, a delay and maximal acceleration of an output parameter value are used in the model. These characteristics are set by the cubic spline and 3rd polynomial coefficients and 2 constants. This method of coding provides a com-pact type of storing information about a transient process in the computer memory and facilitates presenting and using data during the simulation. The procedure of using this class of models to simulate several simultaneous disturbance and control values is described in the article.