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Advanced feedback control of magnetohydrodynamic instabilities: Comparison of compensation techniques for radial sensors

机译:磁流体动力学不稳定性的高级反馈控制:径向传感器补偿技术的比较

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摘要

A survey of the feedback algorithms exploiting radial sensors applied in RFX-mod is presented. A Fourier variant of the 'intelligent shell', whose efficiency is limited by the aliasing coming from the active coils' sideband harmonics, and 'clean mode control', a method to single out and cancel this pollution, are compared for both tearing mode and resistive wall mode control. Simulations for 'explicit mode control', a different technique still to be tested in RFX-mod, are also discussed: this method removes the sidebands' effect by subtracting the entire vacuum coils' field. The conclusion is that 'clean mode control' is a better way to implement radial sensors. Since the latter have the technical advantage of allowing an arrangement outside the plasma-facing structures, the efficient control scheme developed at RFX-mod can be considered reactor-relevant.
机译:提出了对利用RFX-mod中应用的径向传感器的反馈算法的概述。对“智能外壳”的傅立叶变体进行了比较,其效率受到有源线圈边带谐波混叠的影响,而“清洁模式控制”是一种识别并消除这种污染的方法,在撕裂模式和电阻壁模式控制。还讨论了“显式模式控制”的仿真,这是一种尚待在RFX-mod中测试的不同技术:该方法通过减去整个真空线圈的磁场来消除边带效应。结论是“清洁模式控制”是实现径向传感器的更好方法。由于后者具有允许在面向等离子体的结构外部布置的技术优势,因此可以将在RFX-mod上开发的有效控制方案视为与反应堆相关。

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