Engine Parameter Collector System Design And Software Testing

Engine Parameter Acquisition Display is an important member of Helicopter Seat Room Display System, and is made of Engine Parameter Acquisition Unit (EPU) and Engine Parameter Display (EPD). EPU is joined with Engine, Hydraulic System, Oil System, Fuel System and Warning System by the wire. It acquires the parameter of engine, for esample, analog signals, frequency signals and discrete signals, etc. Then data processing, compare data and operation is executed. At last EPU communicates the data to EPD and other equipment of the helicopter by the RS-422.This dissertation mainly studies the application of digital signal processor (DSP) to EPU. A new method based on two DSPs is put forward to design the hardware and software platforms of the Engine Parameter Acquisition system in this dissertation.At the beginning, the paper introduces the current situation of EPU and characteristic of digital signal processor. Combining the need of the EPU, the author particularly expatiates on the main idea of designing the hardware system of EPU. After analysis and model selection, the author designs the overall scheme and hardware circuit.The paper emphatically introduces the EPU system software, in the course, we can get a conclusion that because of DSP's sustentation of advanced language, and modularized programming idea, which make the whole EPU program' s development easy, the period of development shorten greatly, readability boosted enormously, extensibility and maintainability improved highly.Finally, the emulator software based on virtual instrument is introduced, and it is used in the software test of EPU.