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Design of steady-state disturbance rejection controller for aeroengine based on geometric design method in finite frequency range
Received date: 2022-05-13
Revised date: 2022-07-05
Accepted date: 2022-08-03
Online published: 2022-08-31
Supported by
National Level Project
In the design process of traditional engine steady-state disturbance rejection controller， the control performance index fails to fully consider the typical characteristics of the controlled object and disturbance signal. For example， the number of sensors and actuators that can be used as feedback is limited， and the disturbance energy is only concentrated in the finite frequency domain. Therefore， it is not always possible to obtain satisfactory control performance. In this study， a design method of steady-state disturbance rejection controller called “Geometric Design Method” is proposed， which can improve the performance by using the geometric analysis method in the finite frequency domain. This method can intuitively define the control performance index of closed-loop system output in finite frequency domain and the output disturbance rejection performance limit when the control signal is in the limited condition. Thus， the graphical method is used to solve the problem of obtaining the disturbance rejection controller in the finite frequency domain. The simulation shows that when the aeroengine encounters the Mach number disturbance of atmospheric turbulence whose energy is mainly concentrated in 2-16 rad/s finite frequency domain under cruise steady-state conditions， compared with the traditional mixed sensitivity H∞ controller， the disturbance rejection percentage of the corrected fan speed and the thrust is increased by more than 30% and 15%， respectively.
Jiajie CHEN , Jiqiang WANG , Haibo ZHANG , Zhongzhi HU , Xinmin CHEN . Design of steady-state disturbance rejection controller for aeroengine based on geometric design method in finite frequency range[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2023 , 44(9) : 327434 -327434 . DOI: 10.7527/S1000-6893.2022.27434
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