Turbofan engine transition state disturbance suppression method based on preset performance

The invention discloses a turbofan engine transition state disturbance suppression method based on preset performance. It is considered that the transition process of a turbofan engine needs to meet a given performance index, external disturbance has great influence on the stability of a system in practical application, and a controller may fail under serious conditions. In order to ensure that the transition state performance of the turbofan engine can still meet a given performance index under the action of external disturbance, the influence of the external disturbance on the system is regarded as the structural uncertainty of the system, an index conversion strategy is designed based on a preset performance method, the given performance index constraint is converted into a design index of a controller, and finally, a feasible controller is obtained by using a quadratic sum technology. According to the method, when the external disturbance exists, the turbofan engine transition state control system operate