The simulator for electric power industry can emulate practical condition of field production and train the operators repeatedly to enhance their operation capability.

Simulation results based on ideal mathematical model and industrial model show that the PID Elman network is prior to the modified Elman network in identification of nonlinear dynamic systems.

Model of self-generation of angular positioning precision during mutual lapping machining process for end-tooth indexing table was built. Simulation results agree with industrial machining practice.