Research On Design Of Sensor Signal Simulation Circuit

As the aero engine digital control system development testing platform, digital semi-physical simulation system could effectively reduce the development cycle, and reduce the cost in both expense and human resource. This creation has the important scientific value and pragmatic value. The sensor signal simulation device is the absolutely necessarily part of the simulation system.We discussed the overall solution of semi-physical simulation experiment for engine digital control system in this paper, and developed a signal simulation device for this experiment. This device implemented the data exchange between controller and engine real-time model computer, and implemented the simulation and measure of signals as well. We also carried on validation for the design in the paper.This paper started from introducing semi-physical simulation technology and sensor technology. On the basis of analyzing overall structure of semi-physical simulation experiment for engine digital control system, we provided a design of a signal simulation device based on serial port communication technology. Then we simulated the design circuit using Protel DXP, carried on the preliminary performance test to the signal simulation device in the static control mode. The test result indicated that the performance of the signal simulation device has met the predetermined requirements.