A thrust control method of variable cycle aeroengine based on sarsa

Abstract

The present invention relates to the technical field of aviation power system control, and provides a SARSA-based variable-cycle aero-engine thrust control method, including: Step 1: Based on a variable-cycle aero-engine simulation model, designing a SARSA controller for variable-cycle aero-engine thrust control : Select part of the output variables, thrust-related parameters, and part of the input variables of the simulation model as the input and output of the SARSA controller respectively, and set learning objectives; Step 2: divide the input parameters and output parameters of the SARSA controller into intervals, and design rewards Rules; Step 3: Train the SARSA controller and update the Q table; Step 4: Perform a simulation test on the Q table, if the test result does not meet the learning objectives, go to Step 3; otherwise, save the Q table. The invention can improve the control accuracy and efficiency of the variable-cycle aeroengine with complicated features such as multiple control variables, strong nonlinearity, variable operating conditions and large perturbation of system parameters.

Description

technical field [0001] The invention relates to the technical field of aerodynamic system control, in particular to a SARSA-based variable cycle aeroengine thrust control method. Background technique [0002] The variable cycle aeroengine is a type of engine that changes the nature of the thermodynamic cycle by adjusting the variable geometry components to adapt to the current flight conditions. It has two working modes of turbojet and turbofan: in turbojet mode, it has good supersonic performance and high unit thrust; in turbofan mode, it has good subsonic performance and low fuel consumption. The variable-cycle aero-engine combines the performance advantages of turbofan / turbojet, and has a wider flight envelope than conventional cycle engines, showing great potential in both military and civilian fields. In addition, the large flight envelope has high requirements on the adaptability of the power plant, and the addition of adjustable components directly reflects the incre...

AI Technical Summary

Problems solved by technology

In the existing variable-cycle aeroengine thrust control methods, the control structure based on variable parameter PID is still used. Although the parameters are variable to adapt to the flight conditions, it is difficult to solve complex characteristics such as strong nonlinearity, time-varying parameters, and multiple control variables. There are still great limitations such as coupling between loops in the control problem of the variable cycle aero-engine, and the response speed is slow and the overshoot is large. It is still very conservative to pursue a higher level of performance of the aero-engine, and there is a bottleneck

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