PROBLEM SOLVING BY DIGITAL-ANALOG SIMULATION

An evaluation of four simulation languages, MIDAS, APACHE, MIMIC, and DSL/90, is made to determine their relative merits. The application of analog computer techniques to digital-analog simulation is considered. The problems discussed are as follows: Solution to a set of linear algebraic equations, linear programming, hybrid simulation, partial differential equations, boundary value problems, parameter optimization using a least squares error criterion and roots of polynomial equations. A mathematical outline of the technique or problem is given as well as the digital program, written in DSL/90, which is used to represent the problems. Possible improvements in the simulation language are shown. Some of the suggestions presented include the ability to dimension variables, and a means of using an interaction technique.