H_∞Loop Shaping Control for Plasma Vertical Position Instability on QUEST

作     者：刘晓龙 Kazuo NAKAMURA Tatsuya YOSHISUE Osamu MITARAI Makoto HASEGAWA Kazutoshi TOKUNAGA 薛二兵 Hideki ZUSHI Kazuaki HANADA Akihide FUJISAWA Hiroshi IDEI Shoji KAWASAKI Hisatoshi NAKASHIMA Aki HIGASHIJIMA Kuniaki ARAKI 

作者机构：IGSESKyushu University RIAMKyushu University Tokai University 

出 版 物：《Plasma Science and Technology》 (等离子体科学和技术（英文版）)

年 卷 期：2013年第15卷第3期

页      面：295-299页

核心收录：

学科分类：08[工学] 0827[工学-核科学与技术] 082701[工学-核能科学与工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：Japan Society for the Promotion of Science  JSPS: 23246162 

主　　题：vertical position instability robust control loop shaping QUEST 

摘      要：QUEST has a divertor configuration with a high and a negative n-index, and the problem of plasma vertical position instability control in QUEST is still under extensive study for achieving high efficiency plasma. The instability we considered is that the toroidal plasma moves either up or down in the vacuum chamber until it meets the vessel wall and is extinguished. The actively controlled coils （HCU and HCL） outside the vacuum vessel are serially connected in feedback with a measurement of the plasma vertical position to provide stabilizing control. In this work, a robust controller is employed by using the loop synthesis method, and provides robust stability over a wide range of n-index. Moreover, the gain of the robust controller is lower than that of a typical proportional derivative （PD） controller in the operational frequency range; it indicates that the robust controller needs less power consumption than the PD controller does.