关键词: 流动控制, 空气动力学, 旋转失速, DSP在线控制

Abstract: A self-induced on-line control of rotating stall of an air compressor has been investigated experimentally in this article. Based on the analysis of dynamic signals in the time domain, frequency domain, filter, and the threshold value of correlated parameters, a new digital signal processor (DSP) controller has been made. The experimental results show that the DSP controller can give a warning signal just before rotating stall occurs and then the micro air injection system is triggered to suppress the prestall waves and improve the stall margin. That is also a new way to extend the steady line for compressor.

Key words: flow control, aerodynamics, rotating stall, DSP on-line control