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About 3,235 papers for “microcomputer control”

Microcomputer process control

John Lewis · 1983

"The objective of this work is to extend the functions of a MOSTEK micro-computer allowing it to function as data logging and as a digital control unit. It will be capable of accepting multiple inputs from analog sensors; of computing multiple control functions with FORTRAN programming; of using parameters that may be entered via a keyboard; of comparing the control functions with set points that may be entered via the the keyboard; and of outputting multiple control signals that may be used to activate a control device. In the work described here, the output signal would be an on-off control only. Programming will be in FORTRAN, except in very unusual circumstances. Digital-to-Analog conversion boards are part off the MOSTEK microcomputer system so that extension to analog outputs will be possible fairly easily. The MOSTEK microcomputer is a complex piece of equiptment that is fascinating in its own respect. It is a further objective of this work to make the power of the computer available to those who do not find it fascinating. Typical chemical engineers who need data logging or control capabilites but do not want (or need) to learn anything about the microcomputer itself, should be able to satsify their needs using this paper and an assumed understanding of the FORTRAN language. Any or all of the values of the variables -- input or output -- or any function of the variables as may be computed in a FORTRAN program, may be stored on a diskette or may be printed out. To demonstrate the control system, two primitive processes were controlled: 1. Pressure control of a vacuum vessel by controlling the air bleed-in rate; 2. Temperature control of a stirred bucket of water by proportioning an inlet flow of hot water."--Introduction.

Cited by 0

Multiple Microcomputer Control Algorithm.

R.O. Pettus, Bonnell,Ronald D, Michael N. Huhns et al. · Defense Technical Information Center (DTIC) · 1979

The design, analysis and performance evaluation of the architecture of a mutiprocessor is presented. The architecture is a hierarchically structured, functionally distributed, multiple microcomputer system. Its operating system is a multi-level structure implemented in an optimal combination of hardware, firmware, and software. This architecture is suited to any application, such as process control or real-time system simulation, in which the basic computational tasks do not change in time. Control functions are distributed among the microcomputer; however, the scheduling and execution of these tasks is governed at each microcomputer level by a local, real-time operating system. This local operating system is implemented primarily in firmware to minimize overhead. However, the control structure is designed to be independent of implementation so that a variety of microcomputers can be utilized together. Moreover, it is possible to add to each local processor an additional subprocessor which implements the operating system.

Cited by 0

Microcomputer Control of Power Converters

C.M. Alegria, J.P. Sucena Paiva, L.L. Freris · IEEE Transactions on Power Apparatus and Systems · 1984

Thyristor power converters are charac terized by an inherent discrete control action and are, therefore, particularly well suited to on-line control by microcomputers. The paper presents a new design of digital controllers based upon powerfull 16-bit or bit-slice microprocessors, which provide high firing time resolution and enough computing power to implement sophis ticated control strategies. Both hardware and software are discussed, with special emphasis on the firing con trol algorithms. The properties of Pulse Frequency Con trol (PFC) and Pulse Phase Control (PPC) are examined and small-signal discrete models are presented. These models are used in the analysis of constant current and constant extinction angle control through the z-transform method.

Cited by 12

Microcomputer control of liquid chromatography

CLIVE D. McFARLAND, STEVEN PRICE, Robert A. Brown et al. · Biochemical Society Transactions · 1984

Conference Article| December 01 1984 Microcomputer control of liquid chromatography CLIVE D. McFARLAND; CLIVE D. McFARLAND 1Research and Development Department, Blood Products Laboratory, Dagger Lane, Elstree, Herts. WD6 3BX, U.K. Search for other works by this author on: This Site PubMed Google Scholar STEVEN PRICE; STEVEN PRICE 2Research and Development Department, Blood Products Laboratory, Dagger Lane, Elstree, Herts. WD6 3BX, U.K. Search for other works by this author on: This Site PubMed Google Scholar ROBERT A. BROWN; ROBERT A. BROWN 3Research and Development Department, Blood Products Laboratory, Dagger Lane, Elstree, Herts. WD6 3BX, U.K. Search for other works by this author on: This Site PubMed Google Scholar MICHAEL J. HARVEY MICHAEL J. HARVEY 4Research and Development Department, Blood Products Laboratory, Dagger Lane, Elstree, Herts. WD6 3BX, U.K. Search for other works by this author on: This Site PubMed Google Scholar Biochem Soc Trans (1984) 12 (6): 1098–1099. https://doi.org/10.1042/bst0121098 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Facebook Twitter LinkedIn MailTo Cite Icon Cite Get Permissions Citation CLIVE D. McFARLAND, STEVEN PRICE, ROBERT A. BROWN, MICHAEL J. HARVEY; Microcomputer control of liquid chromatography. Biochem Soc Trans 1 December 1984; 12 (6): 1098–1099. doi: https://doi.org/10.1042/bst0121098 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll JournalsBiochemical Society Transactions Search Advanced Search This content is only available as a PDF. © 1984 Biochemical Society1984 Article PDF first page preview Close Modal You do not currently have access to this content.

Cited by 2

Microcomputer Based Real-Time Control

RZ Zurawski, D. K. L. Wong · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1987

The paper discusses some aspects of real-time control with microcomputers and commerc-ially available computer-process interface hardware and accompanying software. A library of Turbo Pascal CALLable routines written to control the DT 2801 I/O board is described. In order to achieve on a microcomputer a real-time multitasking environment, MS DOS was combined with an inexpensive real-time executive. Development of a multivariable process control is discussed. Complete Turbo Pascal programs performing controlling and alarm generating functions are presented.

Cited by 1

Microcomputer Control of PWM Inverters

Giuseppe Buja, Paolo Fiorini · IEEE Transactions on Industrial Electronics · 1982

A method is proposed for implementing on a microcomputer the control of inverters modulated with a digital technique. It consists of storing in the microcomputer memory the switching patterns relative to a limited number of levels of the first harmonics of the inverter output voltage and of computing on line the actual pattern by interpolating the stored values. This allows the inverter output voltage to take a continuous range of values, while the microcomputer operates in real time and needs reduced memory requirements. A mathematical analysis of the accuracy of the method is performed. A brief description of a single-chip microcomputer controller based on the proposed method and some experimental results are included.

Cited by 22

Advanced Microcomputer for Engine Control

F. Bruce Gerhard, Minoru Matsuda, Kazuo Funabashi · SAE technical papers on CD-ROM/SAE technical paper series · 1986

<div class="htmlview paragraph">NEC has developed an 8-bit CMOS single-chip microcomputer, the uPD78312, for real time control and high speed data processing applications. The uPD78312 features very powerful on-chip input/output hardware which makes it especially suitable for automotive engine control. Included are multi-function pulse input/output hardware and a novel and efficient interrupt handling facility. These combine to make significant reductions in the software overhead in engine control systems.</div> <div class="htmlview paragraph">The uPD78312 is the first member of a new family of advanced controller microcomputers, the uCOM-78000 series. This new family has been derived from uCOM-7800 series which includes the uPD78C11.</div> <div class="htmlview paragraph">This paper includes a brief description of the uPD78312 and outlines the hardware for an engine control system utilizing the uPD78312 and associated NEC peripheral chips.</div>

Cited by 1

Microcomputer control - Case study I

P. A. Witting · Institution of Engineering and Technology eBooks · 1988

This chapter presents the approach used by the author to implement a computerized 3-term control scheme on a small process. The computer used was a standard Commodore CBM 4032 connected to the plant via a proprietary interface unit. The program was written in BASIC for convenience and clarity but this gave severe timing problems which were, however, overcome. Because of the stringent speed requirements no modifications to the three term algorithm were attempted. Had a more efficient programming language been available, the techniques outlined in chapters four and five could have been implemented.

Cited by 0

Microcomputer-based area control system

M. Thuot · University of North Texas Digital Library (University of North Texas) · 1977

A microprocessor control system is described, which will monitor room interlocks, enable the firing of high-voltage pulsers, and display the safety status of a 10 kJ-laser laboratory. The system will increase the safety of personnel by enforcing their exclusion from dangerous areas, by detecting breaches of security safeguards, and by disabling high-voltage power supplies. The microprocessor system allows five logical modes of operation corresponding to differing uses of areas in the laboratory; a safety procedure must be followed for each of these modes. The microprocessor follows the operator through prescribed steps of the procedure by monitoring associated door and area-interlock switches. After completion of the procedure, the microprocessor activates the corresponding enabling outputs, which permit the operator to energize high-voltage power supplies. Should safety be breached during or after completion of a procedure, e.g., should a door wrongly open, the microprocessor will cancel any enable command and will return to a safe state.

Cited by 0Open access

Microcomputer evaluation in robot control

J. A. Tenreiro Machado, J. L. Martins de Carvalho, Alexandra M. Galhano · Portuguese National Funding Agency for Science, Research and Technology (RCAAP Project by FCT) · 2002

The computational burdens posed by modern control algorithms preclude its industrial application using present-day microcomputers. The authors evaluate the computational load of different logical and arithmetic operations and the capabilities of several computing systems (software and hardware). This study reveals that real-time limitations can be alleviated through the adoption of general techniques associated with the data representation. Such techniques achieve not only a more efficient management of the computational resources but also provide a deeper insight on developments toward future real-time control architectures.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

Cited by 0Open access

Microcomputer control in hazardous areas

G. R. Jones · Electronics and Power · 1985

The low power consumption of CMOS technology makes it an ideal medium for control equipment within hazardous areas. Here we look at the design of one of this new breed of intrinsically safe microcomputers

Cited by 0