{"title":"托卡马克长脉冲操作智能数字积分器的研制","authors":"Y. Kawarnata, I. Yonekawa, K. Kurihara","doi":"10.1109/FUSION.2002.1027669","DOIUrl":null,"url":null,"abstract":"A new digital integrator with high input voltage and a long-time low drift speed has been developed in JT-60. This integrator uses an integrating method with a pair of a voltage-to-frequency converter (VFC) and an up and down counter (UDC) (VFC-UDC unit). However, this method has a saturation of the VFC for large input, leading to integration error. To improve it, the new digital integrator is composed of three sets of VFC-UDC units in parallel and a digital signal processor (DSP). Three VFC-UDC units with different input ranges integrate an identical input signal respectively, and the DSP selects a suitable integrated signal among three integrated outputs at a sampling frequency of 10 kHz and makes a chain of integrated signals. The performance of the integrator has been tested using a disruptive discharge in JT-60. A good integration result has been obtained though large signal is input. Also, fundamental characteristics of the VFC, linearity, thermal drift, dead band, which are causes of integration errors, are described.","PeriodicalId":44192,"journal":{"name":"NINETEENTH CENTURY MUSIC","volume":null,"pages":null},"PeriodicalIF":0.3000,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"12","resultStr":"{\"title\":\"Development of an intelligent digital integrator for long-pulse operation in a tokamak\",\"authors\":\"Y. Kawarnata, I. Yonekawa, K. Kurihara\",\"doi\":\"10.1109/FUSION.2002.1027669\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"A new digital integrator with high input voltage and a long-time low drift speed has been developed in JT-60. This integrator uses an integrating method with a pair of a voltage-to-frequency converter (VFC) and an up and down counter (UDC) (VFC-UDC unit). However, this method has a saturation of the VFC for large input, leading to integration error. To improve it, the new digital integrator is composed of three sets of VFC-UDC units in parallel and a digital signal processor (DSP). Three VFC-UDC units with different input ranges integrate an identical input signal respectively, and the DSP selects a suitable integrated signal among three integrated outputs at a sampling frequency of 10 kHz and makes a chain of integrated signals. The performance of the integrator has been tested using a disruptive discharge in JT-60. A good integration result has been obtained though large signal is input. Also, fundamental characteristics of the VFC, linearity, thermal drift, dead band, which are causes of integration errors, are described.\",\"PeriodicalId\":44192,\"journal\":{\"name\":\"NINETEENTH CENTURY MUSIC\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.3000,\"publicationDate\":\"2002-11-07\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"12\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"NINETEENTH CENTURY MUSIC\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/FUSION.2002.1027669\",\"RegionNum\":1,\"RegionCategory\":\"艺术学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"0\",\"JCRName\":\"MUSIC\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"NINETEENTH CENTURY MUSIC","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/FUSION.2002.1027669","RegionNum":1,"RegionCategory":"艺术学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"0","JCRName":"MUSIC","Score":null,"Total":0}
Development of an intelligent digital integrator for long-pulse operation in a tokamak
A new digital integrator with high input voltage and a long-time low drift speed has been developed in JT-60. This integrator uses an integrating method with a pair of a voltage-to-frequency converter (VFC) and an up and down counter (UDC) (VFC-UDC unit). However, this method has a saturation of the VFC for large input, leading to integration error. To improve it, the new digital integrator is composed of three sets of VFC-UDC units in parallel and a digital signal processor (DSP). Three VFC-UDC units with different input ranges integrate an identical input signal respectively, and the DSP selects a suitable integrated signal among three integrated outputs at a sampling frequency of 10 kHz and makes a chain of integrated signals. The performance of the integrator has been tested using a disruptive discharge in JT-60. A good integration result has been obtained though large signal is input. Also, fundamental characteristics of the VFC, linearity, thermal drift, dead band, which are causes of integration errors, are described.
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19th-Century Music covers all aspects of Western art music between the mid-eighteenth and mid-twentieth centuries. We welcome--in no particular order--considerations of composers and compositions, styles, performance, historical watersheds, cultural formations, critical methods, musical institutions, ideas, and topics not named on this list. Our aim is to publish contributions to ongoing conversations at the leading edge of musical and multidisciplinary scholarship.
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