Turbofan engine robust fault-tolerant anti-interference model reference dynamic output feedback control method

Abstract

The invention discloses a turbofan engine robust fault-tolerant anti-interference model reference dynamic output feedback control method, which comprises the following steps of: step 1, constructing a turbofan engine linearization model and a reference model by considering an actuator fault, unknown external interference and parameter uncertain items at the same time; step 2, designing coupling of a state observer, a disturbance observer and a fault estimator by using output information and control input information of the linearization model of the turbofan engine, and obtaining a disturbance estimated value and a fault estimated value; and step 3, designing a robust fault-tolerant anti-interference dynamic output feedback controller based on the interference estimation value and the fault estimation value obtained in the step 2 and the information of the reference model constructed in the step 1. By means of the method, the turbofan engine can asymptotically track the expected reference trajectory under the condition that the influence of actuator faults, external disturbance and parameter uncertainty is considered.

Description

technical field [0001] The invention belongs to the field of aerospace technology, and in particular relates to a turbofan engine robust fault-tolerant anti-jamming model reference dynamic output feedback control method. Background technique [0002] Aeroengine is a kind of highly complex and precise thermal machinery, which is the source of aircraft power. As a kind of aeroengine, turbofan engine has many advantages such as large thrust, high propulsion efficiency, low noise, low fuel consumption rate, and long range of aircraft, and has received extensive attention and application. However, the turbofan engine system itself is a highly complex aerothermodynamic system, and the operating envelope formed by the flight altitude and flight Mach number is wide. Within the operating envelope, as the environmental conditions change and The characteristics of the turbofan engine will also change with the change of the working state (such as maximum state, cruising state, rated st...

AI Technical Summary

Problems solved by technology

Actuator failure is an inevitable problem in practical engineering applications. Factors such as complex flight conditions, high temperature and high pressure usually lead to wear or aging of engine actuators, which reduces the working efficiency of the actuator and reduces the engine control performance.

In addition, due to factors such as noise, interference, and sensor aging, the state of the system cannot be measured accurately, or even cannot be measured. The premise of the state feedback design is to obtain all the state information of the system, which brings great difficulties to the design of the controller. coming with great difficulty

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