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一种新型捻股机放卷恒张力控制策略 被引量:1
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作者 胡舟逸 刘剑 +1 位作者 李春峰 万慧雯 《测控技术》 2020年第4期92-96,共5页
针对捻股机生产加工钢帘线的放卷过程中张力不恒定的问题,对放卷过程传动系统进行动态转动分析,建立恒张力控制的数学模型,并提出一种基于放线工字轮半径实时前馈辅以比例控制的新型控制策略。仿真分析表明,相较于传统PID张力控制,该新... 针对捻股机生产加工钢帘线的放卷过程中张力不恒定的问题,对放卷过程传动系统进行动态转动分析,建立恒张力控制的数学模型,并提出一种基于放线工字轮半径实时前馈辅以比例控制的新型控制策略。仿真分析表明,相较于传统PID张力控制,该新型控制策略能有效提高恒张力控制中的关键控制因子——放线半径预测的准确性,改善张力输出精度,提高张力输出的动态稳定性和抗干扰能力,实现钢帘线放卷过程中恒张力控制的预想效果。 展开更多
关键词 钢帘线加工 放卷过程 恒张力控制 半径实时前馈
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Performance of an electron linear accelerator for the first photoneutron source in China
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作者 Xuan Li Jun-Qiang Zhang +3 位作者 Guo-Qiang Lin Wen-Cheng Fang Qiang Gu Meng Zhang 《Nuclear Science and Techniques》 SCIE CAS CSCD 2019年第4期1-7,共7页
A compact 15.0-MeV, 1.5-kW electron linear accelerator(LINAC) was successfully constructed to provide an electron beam for the first photoneutron source at the Shanghai Institute of Applied Physics, Shanghai,China. Th... A compact 15.0-MeV, 1.5-kW electron linear accelerator(LINAC) was successfully constructed to provide an electron beam for the first photoneutron source at the Shanghai Institute of Applied Physics, Shanghai,China. This LINAC consists of five main parts: a thermal cathode grid-controlled electron gun, a pre-buncher, a variable-phase-velocity buncher, a light-speed accelerating structure, and a high-power transportation beamline. A digital feedforward radio frequency compensator is adopted to reduce the energy spread caused by the transient beam loading effect. Furthermore, a real-time electron gun emission feedback algorithm is used to keep the beam stable. After months of efforts, all the beam parameters successfully met the requirements of the facility. In this paper, the beam commissioning process and performance of the LINAC are presented. 展开更多
关键词 ELECTRON linear ACCELERATOR HIGH-POWER transportation BEAMLINE Digital feedforward radio frequency compensation real-time ELECTRON GUN emission feedback algorithm Transmission efficiency
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