Starting control method based on improved fractional order active disturbance rejection

Abstract

The invention discloses a starting control method based on improved fractional order active disturbance rejection. The method comprises the following steps: constructing a description equation of a motor rotating speed ring in a starting stage; for a rotating speed ring of the starting motor, obtaining an error feedback control law of an active disturbance rejection model according to a third-order extended state observer and a compensation law; introducing fractional orders, enhancing robustness and stability of a controller while adjustable parameters are increased, performing compensation optimization on the error feedback law of the active disturbance rejection model, obtaining a final control law, and then achieving the fractional order active disturbance rejection control over the rotating speed ring of the starting motor; based on the randomness of evolution, designing an improved GWO algorithm to carry out parameter online optimization on fractional order control. Compared withthe prior art, the influence of multiple uncertainties on the system can be effectively restrained, the online self-tuning of adjustable parameters can be achieved, the control precision and the dynamic performance are improved, and the starting performance of an aero-engine is improved.

Description

technical field [0001] The invention belongs to the field of starting motor control, in particular to a starting control method based on improved fractional order active disturbance rejection. Background technique [0002] In the starting stage, the starter motor needs to provide enough output torque to meet the needs of starting the aeroengine, so that it can quickly complete the starting from zero low speed state, with the gradual increase of the speed, and the difference of starting environment, temperature, pressure and other factors As a result, the nonlinearity of the parameters of the starter motor becomes more and more prominent; the electric starting method of the aero-engine is limited by the voltage, and the original constant torque start needs to be changed to a constant power start, 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 realizing st...

AI Technical Summary

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.

Images