No abstract available.

Present day digital computers are too slow for the comprehensive real-time simulation of complex electronic systems such as those involving guided missiles. Computers appearing 2-3 years hence will be sufficiently fast for these applications. There is and will continue to be fertile application fields for analog-digital computer combinations. An existing large-scale (Univac Scientific 1103A-Epsco converter-Electronic Associates) analog-digital system is described. System design and specifications are discussed which relate to real-time speeds, necessary accuracies, digital computer programming, and synchronizing the digital computer with the remaining system components. Techniques for exploiting each computer's advantages are mentioned. Applications in the guided missile field and in other fields are discussed.

Concerning the age-old argument on the relative merits of analog and digital computation, it has been said that the true future for scientific computation involves the union of the equipment by means of an analog-digital converting device.In this period prior to the digital computer with fractional-microsecond arithmetic commands and memory accesses, it appears that for many problems such a union is necessary.Or, from another poi.at of view, considerable machine time savings can be realized from such a union.The Digital Computing Center and the Analog Computing Center of The Ramo-Wooldridge Corporation have cooperatively arranged for the design and construction of a general purpose analog-digital conversion device, the system point of view of which will be discussed here especially in relation to the digital computer.The conversion equipment will be obtained on a contract with the Epsco Company of Boston, Massachusetts, and is scheduled for delivery in October 1956.The conversion and control techniques are the result of Epsco developments with the system organization and specifications the responsibility of The Ramo-Wooldridge Corporation.The equipment will tie in the Univac Scientific Model l103A digital computer with a large analog computer installation consisting mostly of Electronic Associates Corporation equipment.The 1103A computer is a large-scale system consisting of 4096 words of magnetic core memory, Uniservo magnetic tapes (up to 10 in number) for input-output and atLxiliary storage, and a magnetic drum of 16,384 word capacity.Computing speeds for the equipment are approximately 50 microseconds for addition and 250 microseconds for multiplication (times include memory accesses).The analog equipment consists of 300 operational amplifiers including 84 integrating amplifiers, 12 resolvers, 24 servo-multipliers, function generating equipment, and a number of x-y and six-channel recorders.The equipment has 3 operating consoles and can be used on as many as 6 independent problems at one time.The conversion equipment will have sufficient speed and accuracy so that analog results will not be degraded in the translation from analog to digital form.There will be 15 conversion channels each way--that is, 15 analog-to-digital channels and 15 digital-to-analog channels.The authors believe this system, with the analog-to-digital tie-in effected, will be one of the most powerful computation facilities available.The motivation for the conversion device comes from the desire to simulate a complex non-linear missile system in real time or faster.The desire for real-time simulation stems from the fact that noise is to be introduced into the simulation *

article Free AccessAn Integrated Computation System for the ERA-1103 Author: Walter F. Bauer The Ramo-Wooldridge Corporation, Los Angeles, Calif. The Ramo-Wooldridge Corporation, Los Angeles, Calif.View Profile Authors Info & Claims Journal of the ACMVolume 3Issue 3July 1956 pp 181–185https://doi.org/10.1145/320831.320836Published:01 July 1956Publication History 3citation183DownloadsMetricsTotal Citations3Total Downloads183Last 12 Months9Last 6 weeks3 Get Citation AlertsNew Citation Alert added!This alert has been successfully added and will be sent to:You will be notified whenever a record that you have chosen has been cited.To manage your alert preferences, click on the button below.Manage my AlertsNew Citation Alert!Please log in to your account Save to BinderSave to BinderCreate a New BinderNameCancelCreateExport CitationPublisher SiteeReaderPDF

article Free Access Share on On the Demonstration of High-Speed Digital Computers Author: John W. Carr The Ramo-Wooldridge Corporation and the University of Michigan The Ramo-Wooldridge Corporation and the University of MichiganView Profile , Editor: Walter F. Bauer The Ramo-Wooldridge Corporation and the University of Michigan The Ramo-Wooldridge Corporation and the University of MichiganView Profile Authors Info & Claims Journal of the ACMVolume 1Issue 401 October 1954pp 177–182https://doi.org/10.1145/320783.320787Published:01 October 1954Publication History 1citation520DownloadsMetricsTotal Citations1Total Downloads520Last 12 Months13Last 6 weeks9 Get Citation AlertsNew Citation Alert added!This alert has been successfully added and will be sent to:You will be notified whenever a record that you have chosen has been cited.To manage your alert preferences, click on the button below.Manage my AlertsNew Citation Alert!Please log in to your account Save to BinderSave to BinderCreate a New BinderNameCancelCreateExport CitationPublisher SiteeReaderPDF