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Rapid prototyping of advanced control schemes in ASDEX Upgrade
Fusion Engineering and Design ( IF 1.9 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.fusengdes.2020.111958
B. Sieglin , M. Maraschek , O. Kudlacek , A. Gude , W. Treutterer , M. Kölbl , A. Lenz

Abstract The integration of advanced control schemes is becoming more important as the development of fusion experiments progresses. The ASDEX Upgrade discharge control system (DCS) is designed to be adaptable via configuration, no recompilation is necessary to tailor the behaviour of the control system. In order to enable advanced control schemes the required information has to be available during the discharge. With the DCS satellite concept the control system can easily be extended by including, e.g. diagnostics, actuators and data processing nodes. In this paper the extension of DCS for rapid prototyping of control schemes is discussed. To easily add and modify input signals used for advanced control schemes, without the requirement to have expert knowledge of the control system by the experimentalist, a new application process (AP) has been implemented using the C++ Mathematical Expression Toolkit Library (ExprTk), which enables the inclusion of run-time mathematical expressions into DCS. The AP is operated separately from the central DCS as a DCS satellite. This is done to be able to test and validate the calculations without having to make changes to DCS. For tokamak operation, disruptions pose a major threat especially for large devices such as ITER. Therefore, disruption avoidance is an active field of research and the inclusion of avoidance schemes into DCS as part of exception handling is ongoing. For the case of H-Mode density limit disruptions an avoidance scheme using central heating has been implemented and successfully tested on ASDEX Upgrade, exploiting these new features for rapid development and testing.

中文翻译:

ASDEX 升级中高级控制方案的快速原型设计

摘要 随着聚变实验的发展,先进控制方案的集成变得越来越重要。ASDEX 升级排放控制系统 (DCS) 旨在通过配置进行调整,无需重新编译即可定制控制系统的行为。为了启用高级控制方案,必须在放电期间提供所需信息。通过 DCS 卫星概念,控制系统可以轻松扩展,包括诊断、执行器和数据处理节点。在本文中,讨论了 DCS 在控制方案的快速原型设计中的扩展。轻松添加和修改用于高级控制方案的输入信号,无需实验人员具备控制系统的专业知识,使用 C++ 数学表达式工具包库 (ExprTk) 实现了一个新的应用程序进程 (AP),它可以将运行时数学表达式包含到 DCS 中。AP 作为 DCS 卫星与中央 DCS 分开运行。这样做是为了能够在无需更改 DCS 的情况下测试和验证计算。对于托卡马克操作,中断构成了主要威胁,尤其是对于 ITER 等大型设备。因此,中断避免是一个活跃的研究领域,并且正在将避免方案纳入 DCS 作为异常处理的一部分。对于 H 模式密度限制中断的情况,使用集中供热的避免方案已经实施并在 ASDEX 升级上成功测试,利用这些新功能进行快速开发和测试。
更新日期:2020-12-01
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