Conservation-reducing gain scheduling two-degree-of-freedom [mu] controller for aero engine

Abstract

The invention provides a conservation-reducing gain scheduling two-degree-of-freedom [mu] controller for an aero engine. The conservation-reducing gain scheduling two-degree-of-freedom [mu] controllerfor the aero engine comprises a conservation-reducing two-degree-of-freedom [mu] controller group solving module and a degradation parameter estimation loop. According to the conservation-reducing gain scheduling two-degree-of-freedom [mu] controller for the aero engine, the degradation parameter estimation loop is additionally arranged, a gain scheduling controller group is improved to obtain the conservation-reducing two-degree-of-freedom [mu] controller group solving module, reduces the perturbation range of an uncertainty model is reduced, and the conservatism of a robust gain schedulingcontroller is reduced. The degradation parameter estimation loop realizes the reliable estimation of degradation parameters, and then traditional scheduling parameters are combined to realize the gainscheduling control when the engine performance is degraded, the control accuracy of the gain scheduling is improved to the greater extent when the engine performance is degraded, the control system transition time is shortened, the dynamic deviation and static deviation are reduced, high robustness and low conservation are achieved, and the performance of an engine is given to full play.

Description

technical field [0001] The invention relates to the technical field of aero-engine control, in particular to an aero-engine descending conservative gain scheduling two-degree-of-freedom μ controller. Background technique [0002] Aeroengine is a complex nonlinear dynamic system. When working in a wide range of flight envelope, the working state of the engine changes continuously with the change of external conditions and flight conditions. In view of the strong nonlinearity of the aero-engine and the uncertainty of the model, a robust gain-scheduled control method is proposed in the prior art, which divides the engine into a series of operating points, and designs a robust controller at each operating point, and finally adopts The method of gain scheduling selects the appropriate robust controller to control the engine. [0003] The aeroengine robust gain scheduling control method described above can control the aeroengine. However, they are very conservative because they ...

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Problems solved by technology

[0005] In order to solve the problems existing in the prior art, the present invention proposes a two-degree-of-freedom μ controller with reduced conservative gain scheduling for aero-engines, which takes into account both the robust stability and robust performance of the aero-engine control system, and is low in conservatism. The performance degradation degree of the engine is estimated by measuring parameters, thereby eliminating the degradation item in the uncertainty model, reducing the range of the uncertainty model, reducing the conservatism of the robust gain scheduling controller, and being able to Still carry out good control on the real engine, give full play to the performance of the engine, and improve the life-span efficiency of the aircraft

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