A method to set up turbofan engine post-stall model was proposed in consideration of the volume effectiveness

the characteristics of post-stall of the fan and compressor

the combustors with rich fuel and lean fuel characteristics.The models of engine inlet's total temperature distortion

total pressure distortion

and the combination of two kinds of distortions were established.The active control method proposed was based on the correlation measure of pressure.Correlation measure threshold crossing events increased in magnitude and number as the compressor approached the limit of stable operation

so the stall margin could be calculated in a real-time manner.The active control mode was established based on robust control design method.At last

the numerical simulations were carried out.The results show that the active control based on the method of correlation measure successfully makes the compressing part of engine do not enter into stall during transient process

highly improving the dynamic response in the whole transient process.