The linear model of aero-engine is effective within a small application range. According to this problem

the identification method for parameter uncertainty model of aero-engine was proposed. The identification problem was solved by calculating nonlinear programming. The parameter uncertainty was considered in the identification method for an uncertainty model of aero-engine. A parameter uncertainty model of aero-engine with large range of application can be obtained. This method was used for DGEN380 aero-engine. Two parameters

the deviation parameter of actual working conditions and the maximum deviation parameter of model

were defined for describing error range. Compared with experimental data

the uncertainty model of DGEN 380 can simulate the real state of DGEN380 within 1% error range when the variation of the power lever angle was less than 22%.