基于气动力干扰补偿的磁悬挂天平位姿控制研究

Research on position and attitude control of magnetic suspension and balance system based on aerodynamic interference compensation

  • 摘要: 为了保证试验模型在风洞中的空间位姿相对稳定,本文提出了基于气动力干扰补偿的磁悬挂天平位姿控制算法。在对试验模型进行气动力仿真的基础上,得出其所受的气动阻力特性,建立了轴向悬挂系统的动力学模型并设计了基于双环反馈控制的标称控制器。为实现气动干扰力的实时准确估计,提出了一种基于先验模型的扰动估计策略。针对标称控制器无法实现试验模型在超声速风洞中的稳定悬挂的问题,提出基于气动力干扰补偿的磁悬挂天平轴向悬挂系统控制策略并进行仿真分析,并通过搭建风洞气动阻力模拟实验装置开展实验验证。结果表明,与自抗扰控制相比,本文所提出的控制策略具有更强的抵抗风洞气动阻力干扰的能力。

     

    Abstract: To ensure the relative spatial stability of test models in wind tunnels, this study proposes a novel position and attitude control algorithm incorporating aerodynamic interference compensation for magnetic suspension and balance system (MSBS). Aerodynamic drag characteristics of the test model were first obtained through computational fluid dynamics simulations. A dynamic model of the axial suspension system was subsequently established, and a nominal dual-loop feedback controller was also designed. To achieve real-time and accurate estimation of aerodynamic disturbances, a prior model-based disturbance estimation strategy was developed. Furthermore, to overcome the instability of the nominal controller in supersonic wind tunnels, an enhanced control strategy integrating aerodynamic interference compensation into the axial system of MSBS was proposed and validated through numerical simulations. Additionally, a wind tunnel aerodynamic resistance simulation platform was constructed for experimental verification. Comparative experimental results demonstrate that the proposed control strategy exhibits superior robustness against aerodynamic disturbances compared to active disturbance rejection control.

     

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