2.4 m跨声速风洞流场预测自抗扰控制

doi:10.7527/S1000-6893.2019.23154

Abstract

Abstract: The total pressure and Mach number control in the 2.4 m transonic wind tunnel are characterized by strong coupling, time delay, perturbation of system parameters and uncertainty of external disturbances. In order to solve these problems, a predictive Active Disturbance Rejection Control (ADRC) is designed. According to the principle of ADRC, the coupling between the total pressure and Mach number, the modeling errors and the parameter perturbation of the flow field, and the external disturbance can be regarded as total disturbance. Then the total disturbance is estimated by the Extended State Observer (ESO) and compensated by feed-forward control. The decoupling control of total pressure and Mach number is realized and the anti-interference ability of flow field is improved. At the same time, the Smith predictor is used to get the system delay-less output and feed it back to the extended state observer to speed up its convergence speed, so as to improve the performance of the control system. The simulation results show that the controller can realize the decoupling control well with good dynamic characteristics, anti-interference ability, and robustness.

Key words: wind tunnel, total pressure, Mach number, active disturbance rejection control, Smith predictor, decoupling control

CLC Number:

V211.7
TP13

LIU Weijie, HE Fan, LING Zhongwei. Predictive active disturbance rejection control for flow field in 2.4 m transonic wind tunnel[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2019, 40(11): 123154-123154.

References 26

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Predictive active disturbance rejection control for flow field in 2.4 m transonic wind tunnel

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