{"created":"2023-06-20T13:20:35.927634+00:00","id":629,"links":{},"metadata":{"_buckets":{"deposit":"72d6e262-f2e1-4c62-b61f-b4edd5b0d7a3"},"_deposit":{"created_by":1,"id":"629","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"629"},"status":"published"},"_oai":{"id":"oai:ir.soken.ac.jp:00000629","sets":["2:428:14"]},"author_link":["0","0","0"],"item_1_creator_2":{"attribute_name":"著者名","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"JIANG, GEYANG"}],"nameIdentifiers":[{}]}]},"item_1_creator_3":{"attribute_name":"フリガナ","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"ジャン, ジーイェン"}],"nameIdentifiers":[{}]}]},"item_1_date_granted_11":{"attribute_name":"学位授与年月日","attribute_value_mlt":[{"subitem_dategranted":"2005-09-30"}]},"item_1_degree_grantor_5":{"attribute_name":"学位授与機関","attribute_value_mlt":[{"subitem_degreegrantor":[{"subitem_degreegrantor_name":"総合研究大学院大学"}]}]},"item_1_degree_name_6":{"attribute_name":"学位名","attribute_value_mlt":[{"subitem_degreename":"博士（工学）"}]},"item_1_description_12":{"attribute_name":"要旨","attribute_value_mlt":[{"subitem_description":"　　This thesis is on investigation and implementation of embedded EPICS<br />controllers by the use of micro-ITRON to overcome many disadvantages caused by<br />the advent of Ethernet-based device controllers. <br /><br />　　At present almost all accelerator control systems are kind of DCS (Distributed<br />Control Systems) on the basis of so called the standard model. In the standard model,<br />the control system consists of three layers: the presentation layer, the device control<br />layer and the interface layer. <br /><br />　　Another trend of accelerator control systems at present is to use a free toolkit for<br />its middle-ware. Among a few toolkits, EPICS (Experimental Physics and Industrial<br />Control System) is the most widely used. EPICS was first developed in 1991.<br />EPICS’s open, free and full DCS-based features have made it to be adopted in many<br />control systems of scientific facilities, such as accelerators, telescopes, and large<br />high-energy experiments. <br /><br />　　EPICS is designed on the basis of the standard model. The first two layers,<br />namely, the presentation layer and the device control layer, are divided functionally,<br />but connected with each other through a high-speed network such as FDDI. The<br />presentation layer which is called OPI (Operator Interface) layer in the EPICS<br />terminology is typically composed of several workstations and X-terminals that are<br />used as operator consoles. The device control layer consists of VME IOCs<br />(Input/Output Controller) and/or other kinds of computers to accomplish the data<br />processing and control logic. The interface layer is composed of I/O modules on IOC<br />or other field bus modules that interface devices.<br /><br />　　Recent rapid development of Ethernet has made it de fact international standard<br />as the network in accelerator control systems. More and more device controllers with<br />Ethernet interface have been widely used, such as PLCs (Programmable Logic<br />Controller), to replace old field bus interface device controllers. These Ethernet-based <br />device controllers are equipped with more CPU power and memory capacity, and<br />have become intelligent enough to process the control logic that was originally<br />accomplished by IOCs. <br /><br />　　Now due to the advent of Ethernet-based device controllers, the standard EPICS<br />3-Layer model becomes redundant and show some disadvantages: <br /><br />　・ Lacking of real-time response: IOCs communicates with intelligent device<br />　　controllers through Ethernet, while, Ethernet, as defined in IEEE 802.3, is<br />　　unsuitable for strict real-time industrial applications because its<br />　　communication is non-deterministic. <br />　・ Ineffective use of hardware: in EPICS, when we use intelligent device<br />　　controllers, a complicated device driver called “asynchronous driver” is put<br />　　on IOCs to drive intelligent device controllers. Expensive VME machine are<br />　　only used as “protocol transformer” that translates the manufacture’s<br />　　proprietary protocol to EPICS CA (Channel Access) protocol. <br />　・ Duplication of programs: we have put runtime database on IOCs and also<br />　　similar programs at intelligent device controllers such as Ladder on PLCs. <br /><br />　　One way to avoid these disadvantages and maximally use the benefit of using<br />intelligent device controllers is to implement integrating control software (IOC core<br />program named as iocCore in EPICS) on these intelligent device controllers, thus<br />making existed intelligent device controllers to work as separated IOCs. We call this<br />type of controller embedded EPICS controller.<br /><br />　　From EPICS base 3.14.x, iocCore supports can run not only on VxWorks but also<br />recent versions of RTEMS, Solaris, Linux, HPUX, Darwin and Windows, and there<br />have been some implementations of embedded EPICS controllers running on<br />VxWorks and Linux. But they all have some shortages. For example, embedded<br />EPICS controller running on Linux does not have any good real-time response, and <br />embedded EPICS controller running on VxWorks lacks BSP (Board Support Package)<br />support from the hardware manufacturer. <br /><br />　　Many intelligent device controllers available on the market in Japan use<br />micro-ITRON, a kind of Japanese domestic real-time kernel. The advantage of<br />micro-ITRON is that these intelligent device controllers have BSP for micro-ITRON.<br />We have investigated the use of micro-ITRON as a kernel on Ethernet-based device<br /> controllers and also implemented embedded EPICS Controllers on micro-ITRON.<br /><br />　　After implementing embedded EPICS Controllers running on micro-ITRON, the<br />redundant device control layer can be omitted. EPICS architecture can be recovered<br />back to the standard 3-Layer model and the disadvantages mentioned before can be<br />eliminated. Also running iocCore on micro-ITRON allows us to apply embedded<br />EPICS concept to smaller devices that could not be supported by previous solution. <br /><br />This thesis also discusses the performance of the embedded EPICS Controllers<br />and shows that it can be used for real applications.","subitem_description_type":"Other"}]},"item_1_description_7":{"attribute_name":"学位記番号","attribute_value_mlt":[{"subitem_description":"総研大甲第898号","subitem_description_type":"Other"}]},"item_1_select_14":{"attribute_name":"所蔵","attribute_value_mlt":[{"subitem_select_item":"有"}]},"item_1_select_8":{"attribute_name":"研究科","attribute_value_mlt":[{"subitem_select_item":"高エネルギー加速器科学研究科"}]},"item_1_select_9":{"attribute_name":"専攻","attribute_value_mlt":[{"subitem_select_item":"12 加速器科学専攻"}]},"item_1_text_10":{"attribute_name":"学位授与年度","attribute_value_mlt":[{"subitem_text_value":"2005"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"JIANG, Geyang","creatorNameLang":"en"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2016-02-17"}],"displaytype":"simple","filename":"甲898_要旨.pdf","filesize":[{"value":"255.1 kB"}],"format":"application/pdf","licensetype":"license_11","mimetype":"application/pdf","url":{"label":"要旨・審査要旨","url":"https://ir.soken.ac.jp/record/629/files/甲898_要旨.pdf"},"version_id":"e0e88e20-f22d-486a-adac-f77b650fd706"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"thesis","resourceuri":"http://purl.org/coar/resource_type/c_46ec"}]},"item_title":"Development of Embedded EPICS and its application to accelerator control system.","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Development of Embedded EPICS and its application to accelerator control system."},{"subitem_title":"Development of Embedded EPICS and its application to accelerator control system.","subitem_title_language":"en"}]},"item_type_id":"1","owner":"1","path":["14"],"pubdate":{"attribute_name":"公開日","attribute_value":"2010-02-22"},"publish_date":"2010-02-22","publish_status":"0","recid":"629","relation_version_is_last":true,"title":["Development of Embedded EPICS and its application to accelerator control system."],"weko_creator_id":"1","weko_shared_id":1},"updated":"2023-06-20T16:00:29.581597+00:00"}