Direct Digital Control

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Direct Digital Control Of Building Systems

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Author : H. Michael Newman
language : en
Publisher: John Wiley & Sons
Release Date : 1994

Direct Digital Control Of Building Systems written by H. Michael Newman and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Technology & Engineering categories.

It emphasizes throughout the high performance, reliability, and reduced cost of modern digital sensors, control devices, microprocessors, computer memory, and other electronic components.

Direct Digital Control For Building Hvac Systems

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Author : Michael J. Coffin
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06

Direct Digital Control For Building Hvac Systems written by Michael J. Coffin and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Technology & Engineering categories.

Since the publication of the first edition in 1992, the HVAC industry has gone through enormous changes. As simple digital systems have given way to more complex systems, demand for information on how these systems operate, how they are best applied and how they communicate with other building control systems has grown rapidly. Direct Digital Control for Building Systems, Second Edition is thoroughly updated and expanded to include coverage of the architecture of modern digital control systems, distributed intelligence networked systems, communication protocols, the technologies and issues concerning interoperability, the latest application strategies, and defensive techniques for designing and specifying control systems. Numerous illustrations throughout help keep the subject highly accessible, and hardware, software, and systems applications are described in the most universal terms possible. This thoroughly revised second edition also contains a full section on BACnet® standard and Echelon's LonWorks® technology; their meaning, applications, and future implications. An up-to-date appendix is provided. Insights on emerging technologies in intelligent control systems and what the future holds for this dynamic field is covered throughout.

Direct Digital Control

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Author : John J. McGowan
language : en
Publisher: The Fairmont Press, Inc.
Release Date : 1995

Direct Digital Control written by John J. McGowan and has been published by The Fairmont Press, Inc. this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Architecture categories.

Direct Digital Control Systems

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Author : Mary S. Nardone
language : en
Publisher: Springer Science & Business Media
Release Date : 1999-02-28

Direct Digital Control Systems written by Mary S. Nardone and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999-02-28 with Technology & Engineering categories.

Direct Digital Control Systems: Application · Commissioning offers an insightful examination of the critical role of the DDC system in the commissioning process. Included is solid coverage of microprocessor-based control systems combined with the protocols and procedures needed to effectively integrate DDC system validation into systems commissioning. This field handbook is an everyday reference on Direct Digital Control for commissioning personnel. Whether designer, contractor, air balancer, technician, vendor, commissioning agent, owner, operator or student, increasing one's knowledge of DDC control systems will directly improve project performance.

Direct Digital Control Systems

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Author : James Brian Knowles
language : en
Publisher: Wiley-Blackwell
Release Date : 1994

Direct Digital Control Systems written by James Brian Knowles and has been published by Wiley-Blackwell this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Technology & Engineering categories.

Relates rigorously derived mathematical relationships for single-input DDC systems to their practical design. Deterministic and stochastic input data are considered with the objective of demonstrating the close mathematical similarities between results derived by the z- and Laplace Transformations.

Direct Digital Control For Building Hvac Systems

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Author : COFFIN MICHAEL J.
language : en
Publisher:
Release Date : 1992

Direct Digital Control For Building Hvac Systems written by COFFIN MICHAEL J. and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Commercial buildings categories.

Over two million commercial buildings in the U.S. are controlled by direct digital control (DDC) or like systems, and the trend is toward totally intelligent buildings by the end of this century. Even though DDC is quickly replacing traditional methods of controlling temperature, humidity, lighting, security, and life safety in commercial office buildings, guidance on the fundamentals, applications, and economics of DDC has been difficult to find. Applications-oriented and written from a practical point of view, Direct Digital Control for Building HVAC Systems is one of the first books to familiarize the reader with how to' specify, purchase, and support microprocessor-based building control systems. Even those with limited knowledge of digital technology will be enabled to implement DDC systems, thanks to down-to-earth descriptions of the purpose, benefits, and limitations, design, construction, operation, and cost of these systems. Especially valuable are the book's methods for interfacing digital control with existing HVAC systems. Mechanical engineers involved in the design of building control systems, mechanical estimators, facilities, plant, and building operations and maintenance personnel in both the public and private sector will all find this book a valuable resource.

Methodologies For The Direct Digital Control Of Highly Flexible Vehicles

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Author : Duane T. McRuer
language : en
Publisher:
Release Date : 1985

Methodologies For The Direct Digital Control Of Highly Flexible Vehicles written by Duane T. McRuer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Large space structures (Astronautics) categories.

This report presents methodologies for the direct digital control of vehicles with flexible modes. The techniques yield robust control system designs with modest or minimal requirements on the number of sensors and control actuators. the digital system techniques used include primarily the w-transforms for direct design and stability assessment, and the 'hybrid' frequency response, for assessment and understanding of digital system peculiarities. The 'sawtooth Bode' is used as the basic control system design concept. These three elements are applied to several examples, including a comprehensive case study for a fighter aircraft flight and flexible mode control system. Both continuous and discrete system designs are considered and the continuous system characteristics are contrasted with an optimal control design. This comparison pinpoints some of the features needed to make optimal control procedures more practical and mature for flexible vehicle control applications. An important step is taken in this direction by determining the nature of performance criteria which yield, for an example case, a highly robust, extremely simple controller derived from an optimal control procedure.

Direct Digital Control Study

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Author : KLING-LINDQUIST INC PHILADELPHIA PA.
language : en
Publisher:
Release Date : 1985

Direct Digital Control Study written by KLING-LINDQUIST INC PHILADELPHIA PA. and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with categories.

The purpose of this report is to describe the state-of-the-art of direct digital control (DDC) system technology that monitors and controls mechanical and electrical systems found in Government facilities. A DDC system can operate either as a stand-alone control system or as an extension to an Energy Monitoring and Control System (EMCS). Direct digital control systems are self-contained computer based systems which monitor and control processes in accordance with predetermined strategies. This report addresses the commercial-type DDC systems, in which sensors and controls are connected to a control panel. Control devices are modulated directly by the DDC system in accordance with established algorithms. Unlike industrial-type DDC systems, commercial-type DDC systems do not have a specific address for each control point position. Additional keywords: Energy management; Installation; Acceptance tests; Maintenance.

Direct Digital Control Technology

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Author :
language : en
Publisher:
Release Date : 1997

Direct Digital Control Technology written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.

Direct digital control (DDC) is a term used by industry to identify digital control systems for heating, ventilating, and air conditioning (HVAC) systems. DDC is replacing pneumatic and electric control systems traditionally used in the HVAC industry. More than 90% of new construction is the U.S. today uses DDC. Its advantages over the older systems include: (1) lower maintenance, (2) more accurate and reliable temperature control, and (3) built-in energy and maintenance management functions.

Control

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Author :
language : en
Publisher:
Release Date : 1968

Control written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Automatic control categories.