Transactions of Nanjing University of Aeronautics & Astronautics
Development of DSP-Based Dynamic Signal Processing Module for Turbine Flowmeter
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Abstract:
Traditional signal processing methods for turbine flowmeter are unable to solve the contradiction between the realtime performance and the accuracy during the aeroengine bench test or hardware in the loop (HIL) simulation of aeroengine control system. A dynamic flow measurement method based on cycle number of the flowmeter is proposed. And a DSP-based multi-functional dynamic signal processing module for turbine flowmeter is built to validate the method. The developed system can provide three types of output modes including PWM, frequency and D/A. At the same time, the results can be displayed instantly with the module of serial communication interface to obtain dynamic flow signal with good precision. Experimental results show that the stability of flow measurement is greatly improved with precision guaranteed and the real-time response reaches the maximum limit of turbine flowmeter.
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