轴流式压气机旋转失速信号的早期检测

早期检测航空发动机压气机旋转失速信号对于设计一种高效的防喘、消喘控制系统具有重要意义。通过对压气机旋转失速形成、发展、退出过程中压力信号频谱演化特性的分析,提出了一种基于FFT的压气机旋转失速信号检测判据。对某轴流式压气机压力测量信号的分析结果表明,该判据是准确、可靠和快速的,可以用于旋转失速信号的早期检测。

Early Detection of Rotating Stall Signal of Axial Flow Compressor

To detect rotating stall signal of axial flow compressor early is of great significace for the design of an efficient surge-precautionary & anti-surge control system. Based on the analysis of spectrum evolving characteristics of pressure signal measured from a compressor before, during, and after rotating stall, a criterion based on FFT is put forward to detect rotating stall signal. When applied to a certain axial flow compressor, the criterion is proved to be precise , reliable and rapid enough to be used in the early detection of rotating stall signal.