Introduction to the Model Control in Object-oriented simulation

摘要

The Computer Simulation is considered to do experiment with the models. The experiment must be controllable, so it is generally required that the simulation software can provide the users with conveniences to control simulation experiments. We sugested that the control of simulation experiment fall into two catalogues: one is the running control; the other is the model control. In this paper, we discussed the classification of the control of simulation experiment and the hierarchical structure of model in object-oriented simulation. The emphasis is on analyzing the ocncepts of model control. It is easy to implement the running control in a simulation that runs on a computer, but in distributed simulation, for instance in DIS and HLA, to implement the running control is arduous. To implement the model control, especially to control the model structure in the run-time, is quite difficult by using the traditional programming language. The structure of complex system is variable, so the structure of its model is variable too. It is natural to want our simulation software to map clearly to the characteristic of physical world, and so object-orient has many advantages. Using object-oriented methods to design simulation software, we can control and adjust the model by following way: setting before simulation run, interacting with computers in the run-time and designing in the program. We will use SimLab++ (Simulation Laboratory) to explain one way for design of the model control in object-oriented simulation. SimLab++ is an object-oriented simulation software implemented by C++ which intents to provide users with high flexible control conveniences in the simulation run-time. In this paper, we describe the main principles that are used to design model control in SimLab++.