Considering the effect of atmospheric temperature

atmospheric humidity and fuel heating value

a corrected standardization model was proposed relating gas path parameter deviation based on third similarity theory

the multivariate nonlinear overdetermined equations were established using the historical data as learning sample

and the unknown parameters were solved using Gauss-Newton iterative method.The deviation was solved using the corrected standardization model proposed

and the result was compared with deviation solved by other models.the conclusion is drawn that the correction model proposed is closer to the original factory model with higher accuracy

and it is more innovative and has practical value.