Research on the Civil Aero-engine Modeling Method Oriented to Control Law Design

doi:10.3901/JME.2024.16.222

Abstract

Abstract: The non-linear aero-thermodynamic model of civil aero-engine established by the component method has the characteristics of complex structure and strong coupling of parameters, and it is difficult to directly use in the design of control law. A civil aero-engine modeling method oriented to control law design is proposed, which aims at the problem that the design of civil aero-engine control law is difficult, heavy workload, and can only be used for linearized model of nominal point. Simplify the structure of model according to the function of aero-engine control, and use rotor dynamics modeling and combustion reaction dynamics modeling to establish an aero-engine control standard model with a differential form. This model establishes the corresponding relationship of the parameters required for the control of the aero-engine full envelope. The non-linear control method can be directly used in the design of aero-engine control law, which reduces the workload and difficulty of the control law design to a certain extent. Taking the DGEN380 aero-engine as an example, a control standard model is established. The accuracy of the model is verified through experiments and an example of the control law design is given. Then, the civil aero-engine modeling method oriented to control law design has achieved the expected goal.

Key words: aero-engine, modelling, control standard model, control law

CLC Number:

V231

LIU Shuai, WANG Wei, BAI Jie, DAI Shijie. Research on the Civil Aero-engine Modeling Method Oriented to Control Law Design[J]. Journal of Mechanical Engineering, 2024, 60(16): 222-230.

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