Modeling methods and simulation design in the virtual laboratory

This paper proposes a model structure based on “mathematical model and solid model” and a simulation algorithm based on SPICE (Simulation Program with Integrated Circuit Emphasis) for virtual laboratory. In this model, the virtual experiment simulates real experiment via abstracting experiment scenes, instrument objects and element objects from actual experiment and constructing mathematical and solid model with object-oriented method. And familiar modeling methods and technologies are discussed in detail. In the simulation algorithm, SPICE is redeveloped and imbedded in the multimedia interface as simulating kernel, which succeeds in solving integration of simulation model and solid model. Finally, an application example “the virtual laboratory for electronic circuit experiment” is also given. The system provides the users with real experimental environment, convenient operation and powerful simulation capability, and has been implemented and successfully applied in an undergraduate course in many universities of China, and has achieved positive evaluation from the undergraduate students.