A Startup Control Method Based on Improved Fractional Active Disturbance Rejection

Abstract

The invention discloses a starting control method based on improved fractional-order active disturbance rejection. The method includes: constructing a description equation of a motor speed loop in the starting stage; for the speed loop of the starter motor, according to a third-order expansion state observer and a compensation law, obtain The error feedback control law of the active disturbance rejection model; the introduction of fractional order increases the adjustable parameters and enhances the robustness and stability of the controller. The error feedback law of the active disturbance rejection model is compensated and optimized to obtain the final control law , and then realize the fractional-order active disturbance rejection control of the speed loop of the starter motor; based on the randomness of evolution, an improved GWO algorithm is designed to optimize the parameters of the fractional-order control on-line. Compared with the prior art, the influence of many uncertainties on the system can be effectively suppressed, the online self-tuning of adjustable parameters can be realized, the control precision and dynamic performance can be improved, and the starting performance of the aero-engine can be improved.

Description

technical field [0001] The invention belongs to the field of starter motor control, in particular to a starter control method based on an improved fractional-order active disturbance rejection. Background technique [0002] In the starting stage, the starter motor needs to provide a large enough output torque to meet the needs of the aero-engine starting, so that it can quickly start from zero and low speed. Influenced, the nonlinearity of the parameters of the starter motor itself becomes more and more prominent; the electric starting mode of the aero-engine is limited by the voltage, and the original constant torque starting needs to be changed to a constant power starting, which means that the resistance torque characteristics of the aero-engine have changed. It is difficult for traditional control methods to solve these uncertainties when implementing starting control. [0003] Active disturbance rejection control is derived from classical PID, which well inherits the c...

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Problems solved by technology

But on the other hand, the increase of adjustable parameters also brings new difficulties to the controller parameter tuning. The traditional experience and trial and error method are poor in tuning effect, which limits the application of fractional order active disturbance rejection in engineering.

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