STELLA v8 Tutorial 2

3.4 System Dynamics Tool: STELLA Version 8 Tutorial 2 Introduction to Computational Science: Modeling and Simulation for the Sciences Angela B. Shiflet and George W. Shiflet Wofford College © 2006 by Princeton University Press Prerequisite: "STELLA Tutorial 1" Download Download from the text's website the file unconstrained.stm, which contains a STELLA model to accompany this tutorial. Introduction This tutorial introduces the following functions and concepts, which subsequent modules employ: Built-in functions and constants, such as IF, THEN, ELSE, ABS, INIT, EXP, TIME, PI, PULSE, DT, and SINWAVE; relational and logical operators; comparative graphs; and graphical input. Optionally, we cover conveyors, which are useful for some of the later projects. To understand the material of this tutorial sufficiently, we recommend that you do everything that is requested. While working through the tutorial, answer Quick Review Questions in a separate document. Built-ins In the equation mode, we can enter equations into a stock, flow, or converter of a STELLA model. The resulting pop-up menu contains a list of a many of built-in functions that fall into ten categories: array, cycle-time, discrete, financial, logical, mathematical, special purpose, statistical, test input, and trigonometric. In this tutorial, we consider several of these functions that enable us to effectively model many more situations. Browser-accessible documentation ...