Research on the Civil Aero-engine Modeling Method Oriented to Control Law Design
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.
aero-enginemodellingcontrol standard modelcontrol law
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