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Central safety factor and β_N control on NSTX-U via beam power and plasma boundary shape modification, using TRANSP for closed loop simulations

机译:使用TRANSP进行闭环仿真,通过束功率和等离子体边界形状修改对NSTX-U进行中央安全系数和β_N控制

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摘要

The high-performance operational goals of NSTX-U will require development of advanced feedback control algorithms, including control of β_N and the safety factor profile. In this work, a novel approach to simultaneously controlling β_N and the value of the safety factor on the magnetic axis, q_0, through manipulation of the plasma boundary shape and total beam power, is proposed. Simulations of the proposed scheme show promising results and motivate future experimental implementation and eventual integration into a more complex current profile control scheme planned to include actuation of individual beam powers, density, and loop voltage. As part of this work, a flexible framework for closed loop simulations within the high-fidelity code TRANSP was developed. The framework, used here to identify control-design-oriented models and to tune and test the proposed controller, exploits many of the predictive capabilities of TRANSP and provides a means for performing control calculations based on user-supplied data (controller matrices, target waveforms, etc). The flexible framework should enable high-fidelity testing of a variety of control algorithms, thereby reducing the amount of expensive experimental time needed to implement new control algorithms on NSTX-U and other devices.
机译:NSTX-U的高性能操作目标将需要开发先进的反馈控制算法,包括对β_N的控制和安全系数配置文件。在这项工作中,提出了一种通过控制等离子体边界形状和总射束功率来同时控制β_N和安全系数在磁轴q_0上的新颖方法。拟议方案的仿真显示出令人鼓舞的结果,并刺激了未来的实验实施,并最终整合到了一个更复杂的电流分布控制方案中,该方案包括致动各个电子束功率,密度和环路电压。作为这项工作的一部分,开发了在高保真代码TRANSP中进行闭环仿真的灵活框架。该框架在这里用于识别面向控制设计的模型并调整和测试所建议的控制器,该框架利用了TRANSP的许多预测功能,并提供了一种基于用户提供的数据(控制器矩阵,目标波形)执行控制计算的方法。等)。灵活的框架应能够对各种控制算法进行高保真测试,从而减少在NSTX-U和其他设备上实施新控制算法所需的昂贵实验时间。

著录项

  • 来源
    《Nuclear fusion》 |2015年第5期|053033.1-053033.15|共15页
  • 作者单位

    Princeton Plasma Physics Laboratory, Princeton, NJ 08544, USA;

    Princeton Plasma Physics Laboratory, Princeton, NJ 08544, USA;

    Princeton Plasma Physics Laboratory, Princeton, NJ 08544, USA;

    Princeton Plasma Physics Laboratory, Princeton, NJ 08544, USA;

    Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, NJ 08544, USA;

    Princeton Plasma Physics Laboratory, Princeton, NJ 08544, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    spherical torus plasma control; current profile control; optimal control; control-oriented modelling;

    机译:球形环面等离子体控制;当前配置文件控制;最佳控制;面向控制的建模;
  • 入库时间 2022-08-18 00:42:31

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