{"id":{"repo_id":"vt","oai_identifier":"oai:vtechworks.lib.vt.edu:10919/71069"},"canonical_url":"https://search.dev.ndltd.org/etd/vt/oai:vtechworks.lib.vt.edu:10919/71069","repository":{"repo_id":"vt","name":"Virginia Tech","base_url":"https://vtechworks.lib.vt.edu/oai/request"},"display":{"title":"GE-PAC 4020/EAI 580 Hybrid Computing System","abstract":"Hybrid computation is a discipline designed to reap benefits from the strengths of both digital and analog computation. This system welds the capabilities of a GE/PAC<sup>®M/sup> 4020 Process Computer and an EAI® 580 Analog/Hybrid Computing System by means of a special Hybrid Interface. The Hybrid Interface consists of five modules. First, there is the hybrid control module which mediates status and control information between the two computers, and the D to A converter module which provides analog voltages from digital information. Then, there is the analog scanner/controller. which switches voltages from the analog computer to the A to D converter, and the A to D converter itself. Finally, there is a logic interface which exchanges digital signals between the analog computer's logic module and the digital computer. The interface scheme allows either computer to act as the master control, and it provides for full interchange of a problem's parameters between the digital and analog regimes as a problem solution unfolds. The system is fast enough to study many large problems in real-time with good accuracy.","abstract_html":"Hybrid computation is a discipline designed to reap benefits from the strengths of both digital and analog computation. This system welds the capabilities of a GE/PAC&lt;sup&gt;®M/sup&gt; 4020 Process Computer and an EAI® 580 Analog/Hybrid Computing System by means of a special Hybrid Interface. The Hybrid Interface consists of five modules. First, there is the hybrid control module which mediates status and control information between the two computers, and the D to A converter module which provides analog voltages from digital information. Then, there is the analog scanner/controller. which switches voltages from the analog computer to the A to D converter, and the A to D converter itself. Finally, there is a logic interface which exchanges digital signals between the analog computer&#x27;s logic module and the digital computer. The interface scheme allows either computer to act as the master control, and it provides for full interchange of a problem&#x27;s parameters between the digital and analog regimes as a problem solution unfolds. The system is fast enough to study many large problems in real-time with good accuracy.","abstract_has_math":false,"creators":["Bomberger, Alan Joseph"],"institution":"Virginia Polytechnic Institute and State University","degree_name":"Master of Science","degree_level":"masters","degree_discipline":"Electrical Engineering","degree_department":"Electrical Engineering","school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1971,"date_issued":"1971","date_published":"1971","updated_at":"2026-07-22T22:19:00Z","subjects":[],"languages":["en"],"rights":["In Copyright"],"rights_urls":["http://rightsstatements.org/vocab/InC/1.0/"],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/10919/71069","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.department","label":"Department","values":["Electrical Engineering"]},{"key":"dc:creator","label":"Author","values":["Bomberger, Alan Joseph"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2016-05-23T14:57:41Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2016-05-23T14:57:41Z"]},{"key":"dc:date.issued","label":"Date","values":["1971"]},{"key":"dc:publisher","label":"Institution","values":["Virginia Polytechnic Institute and State University"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"dc:type.dcmitype","label":"Dc Type Dcmitype","values":["Text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Electrical Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Virginia Polytechnic Institute and State University"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["In Copyright"]},{"key":"dc:rights.uri","label":"Rights URI","values":["http://rightsstatements.org/vocab/InC/1.0/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/10919/71069"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Hybrid computation is a discipline designed to reap benefits from the strengths of both digital and analog computation. This system welds the capabilities of a GE/PAC<sup>®M/sup> 4020 Process Computer and an EAI® 580 Analog/Hybrid Computing System by means of a special Hybrid Interface. The Hybrid Interface consists of five modules. First, there is the hybrid control module which mediates status and control information between the two computers, and the D to A converter module which provides analog voltages from digital information. Then, there is the analog scanner/controller. which switches voltages from the analog computer to the A to D converter, and the A to D converter itself. Finally, there is a logic interface which exchanges digital signals between the analog computer's logic module and the digital computer. The interface scheme allows either computer to act as the master control, and it provides for full interchange of a problem's parameters between the digital and analog regimes as a problem solution unfolds. The system is fast enough to study many large problems in real-time with good accuracy."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["Master of Science"]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["GE-PAC 4020/EAI 580 Hybrid Computing System"]}]}],"canonical_facts":{"dc:contributor.department":["Electrical Engineering"],"dc:creator":["Bomberger, Alan Joseph"],"dc:date.accessioned":["2016-05-23T14:57:41Z"],"dc:date.available":["2016-05-23T14:57:41Z"],"dc:date.issued":["1971"],"dc:description.abstract":["Hybrid computation is a discipline designed to reap benefits from the strengths of both digital and analog computation. This system welds the capabilities of a GE/PAC<sup>®M/sup> 4020 Process Computer and an EAI® 580 Analog/Hybrid Computing System by means of a special Hybrid Interface. The Hybrid Interface consists of five modules. First, there is the hybrid control module which mediates status and control information between the two computers, and the D to A converter module which provides analog voltages from digital information. Then, there is the analog scanner/controller. which switches voltages from the analog computer to the A to D converter, and the A to D converter itself. Finally, there is a logic interface which exchanges digital signals between the analog computer's logic module and the digital computer. The interface scheme allows either computer to act as the master control, and it provides for full interchange of a problem's parameters between the digital and analog regimes as a problem solution unfolds. 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