刘为杰, 何帆, 杨国超. 低温风洞自抗扰控制研究[J]. 空气动力学学报, 2020, 38(5): 866-873. DOI: 10.7638/kqdlxxb-2018.0160
引用本文: 刘为杰, 何帆, 杨国超. 低温风洞自抗扰控制研究[J]. 空气动力学学报, 2020, 38(5): 866-873. DOI: 10.7638/kqdlxxb-2018.0160
LIU Weijie, HE Fan, YANG Guochao. Active disturbance rejection control for cryogenic wind tunnels[J]. ACTA AERODYNAMICA SINICA, 2020, 38(5): 866-873. DOI: 10.7638/kqdlxxb-2018.0160
Citation: LIU Weijie, HE Fan, YANG Guochao. Active disturbance rejection control for cryogenic wind tunnels[J]. ACTA AERODYNAMICA SINICA, 2020, 38(5): 866-873. DOI: 10.7638/kqdlxxb-2018.0160

低温风洞自抗扰控制研究

Active disturbance rejection control for cryogenic wind tunnels

  • 摘要: 低温风洞总温、总压和马赫数三者之间具有强耦合,流场容易受到干扰,并且流场的精确数学模型难以获得,这些给高性能的流场控制器的设计带来了困难。自抗扰控制具有不依赖被控对象精确模型、抗干扰能力强、算法简单便于工程应用等优点。为此,本文基于自抗扰控制原理设计了低温风洞流场控制策略。采用自抗扰控制,将总温、总压和马赫数三个通道之间的耦合、流场建模误差、系统的参数摄动和外界干扰等视为总干扰,通过扩张状态观测器将总干扰估算出来并进行前馈补偿,一方面实现总温、总压和马赫数的解耦控制,另一方面提高流场的抗干扰能力。研究以NASA 0.3 m TCT风洞为对象,在Matlab/Simulink平台上搭建该风洞流场自抗扰控制模型,并进行了仿真分析。结果表明:自抗扰控制能够很好地实现总温、总压和马赫数的解耦控制,在系统参数具有较大摄动的情况下仍然能够保持良好的控制性能,表现出了良好的抗干扰能力。

     

    Abstract: It is strong coupling between the total temperature, Mach number and stagnation pressure in cryogenic wind tunnel. Moreover, the flow filed is susceptible to external interference and its accurate mathematical model is difficult to be obtained. Thus it is difficult to design a high performance flow filed controller for the cryogenic wind tunnel. The active disturbance rejection control (ADRC) has some advantages, such as not relying on the accurate mathematical model, strong anti-interference ability, simple algorithm for engineering applications and so on. So a flow control strategy for the cryogenic wind tunnel is designed based on the ADRC theory. According to the principle of the ADRC, all the coupling between the total temperature, total pressure and Mach number, the modelling errors, the parameter perturbation of the flow field, and the external disturbance etc, can be regarded as total disturbance. The total disturbance is estimated by a extended state observer (ESO) and compensated by a feed-forward control. On the one hand, the decoupling control of the total temperature, total pressure and Mach number is realized; on the other hand, the anti-interference ability of the flow field is improved. Taking NASA 0.3m TCT wind tunnel as the research object, the flow field ADRC control model was built on Matlab/Simulink platform for simulation analysis. The results show that the ADRC can achieve good decoupling control of the total temperature, total pressure and Mach number, maintain good control performance under the condition of large perturbation of system parameters, and show good anti-interference ability.

     

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