Page 273 - DCAP601_SIMULATION_AND_MODELING

Nisha Sethi, Lovely Professional University
Unit 14: Simulation Languages (II)

Unit 14: Simulation Languages (II) Notes

CONTENTS
Objectives
Introduction

14.1 Block-structured Continuous Simulation Languages
14.1.1 GPSS (General Purpose Simulation Languages)
14.1.2 General Purpose Simulation Packages
14.2 Expression based Languages

14.3 Discrete System Simulation Languages
14.4 Summary
14.5 Keywords
14.6 Self Assessment

14.7 Review Questions
14.8 Further Readings

Objectives

After studying this unit, you will be able to:

 Explain Block structured continuous simulation languages
 Discuss expression based languages
 Analyze discrete system simulation languages

Introduction

GSL (a combined continuous and discrete simulation language) is a FORTRAN-oriented language
which merges the activity and process concepts of a discrete simula tion language with continuous
simulation concepts, thereby permitting the simulation of systems which call for combining
continuous and discrete simula tion techniques.

14.1 Block-structured Continuous Simulation Languages

Block oriented simulation languages are based on the method of analogue computers. The
system must be expressed as a block diagram that defines the interconnection of functional units
and their quantitative parameters. “Programming” means entering the interconnection of the
blocks and their description. Then the user adds statements and/or directives that control the
simulation. If the system is described as a set of equations, they must be converted to a block
diagram. This conversion is a simple straightforward process. The typical blocks available in
most continuous block oriented languages are integrators, limiters, delays, multipliers, hysteresis,
constant values, adders, holders, gain (coefficient) and other.

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