Compressor stall pre-warning signal reconstruction and identification method based on single-path sensor signal

Abstract

The invention provides a compressor stall pre-warning signal reconstruction and identification method based on a single-path sensor signal. The method includes obtaining the pressure signal through asingle-path sensor installed in the circumferential direction of a front-stage case of a compressor; and then according to the rotation characteristic of the compressor stall pre-warning signal, simulating the output of a multi-path sensor in the circumferential direction by adopting a signal translation method, and realizing the multi-path stall pre-warning signal reconstruction of the compressor. The reconstructed multi-path stall pre-warning signal is expressed as the superposition of the torus average and the circumferential pressure disturbance in the vector form, and the circumferentialpressure disturbance vector is subjected to the spatial Fourier transform to be decomposed into the superposition of multi-order modal waves; the first-order modal amplitude is compared with the set threshold value, and the stall is considered to occur when the threshold value is exceeded, and the identification of the stall pre-warning signal is realized. A single sensor can be used to replace aplurality of sensors, so that the defect that a plurality of sensors are installed is overcome, and the method has a large engineering application value.

Description

technical field [0001] The invention relates to the technical field of aero-turbine engines, in particular to a method for reconstructing and identifying a compressor stall precursor signal based on a single-channel sensor signal. Background technique [0002] As the power of modern aircraft, in order to increase the thrust-to-weight ratio and expand the stable working range, the aero turbine engine requires its compressor components to have a higher boost ratio and a wider stable working range. However, according to the working principle of the compressor, as the boost ratio increases, the air flow into the compressor decreases, and the airflow will stall, which will cause surge, making the compressor enter an unstable region, affecting the working safety of the compressor and even the entire engine. [0003] When the aero turbine engine is working, it is necessary to control the stall and surge of the compressor. When the stall is about to occur, the compressor is in an un...

AI Technical Summary

Problems solved by technology

Typically, as disclosed in the patent application publication number CN103216461A, the limitation of this method is that the amount of data is large and time-consuming, and it cannot meet the real-time requirements for stall signal identification during stall and surge control in engineering

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