This paper examines an actual example of a system and the efforts required to make it operational. It addresses both software and hardware considerations, as well as the dialogue between operating, maintenance and eng...
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ISBN:
(纸本)091433154X
This paper examines an actual example of a system and the efforts required to make it operational. It addresses both software and hardware considerations, as well as the dialogue between operating, maintenance and engineering personnel. The paper also discusses some of the human engineering aspects of utilizing color graphic displays in a plant environment. Another aspect that is addressed is the ability to decrease the mean-time-to-repair (MTTR), a malfunction by being able to quickly identify the fault. System availability is a combination of mean-time-between-failures (MTBF) and (MTTR).
The concepts of distributed control and programmable systems have been incorporated in a totally integrated drive system product. The functions of closed loop drive control, logic control, processcontrol, and supervi...
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ISBN:
(纸本)0863410448
The concepts of distributed control and programmable systems have been incorporated in a totally integrated drive system product. The functions of closed loop drive control, logic control, processcontrol, and supervisory control reside in one 'hardware/software' unit. The logical combination of multiple units forms a cohesive systems solution for an industrial process. The systems software and modular hardware are designed with the user in mind. The system is programmable in high level language for easy configurability to custom applications. Maintainability is enhanced with resident software and hardware diagnostics. Flexibility is assured through the use of general purpose hardware, computer assisted programming and complete self-documentation.
This conference proceedings contains 71 papers. New developments in equipment and process techniques with emphasis on semiconductor applications and ion implantation are presented. Ion implanter components, including ...
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This conference proceedings contains 71 papers. New developments in equipment and process techniques with emphasis on semiconductor applications and ion implantation are presented. Ion implanter components, including ion sources, control and diagnostics, and end stations are described. Annealing is also considered, as well as channeling effects.
Summary form only given. A mobile CARS system for combustion and plasma diagnostics is described. The instrument is compact, easily transportable, readily adaptable to a wide variety of laboratories and experiments, c...
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Summary form only given. A mobile CARS system for combustion and plasma diagnostics is described. The instrument is compact, easily transportable, readily adaptable to a wide variety of laboratories and experiments, capable of withstanding high noise and vibration levels, and remotely operable to protect the operator and delicate components from high noise of hazardous environments. The system is intended for single-pulse temperature and concentration measurements in practical combustion systems, such as gas turbines and diesel engines and plasma process applications. The instrument consists of three major subsystems: a transmitter, a receiver and a data acquisition and control subsystem. The instrument is operational and has been used in combustion analysis to demonstrate a dual-broadband CARS method which allows examination of a wide range of combustion species using only two laser dyes simultaneously.
The increasing demand for thermographic process monitoring in industry can finally be met with the introduction of a new modular line-scanning technology that enables each individual user to fit an optimal combination...
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ISBN:
(纸本)089252555X
The increasing demand for thermographic process monitoring in industry can finally be met with the introduction of a new modular line-scanning technology that enables each individual user to fit an optimal combination of measurement and data-analysis functions to his requirements. This article describes some of its many applications and compares the new line-scanning concept with existing temperature-measurement methods.
Future long duration manned space missions will require regenerative Life support subsystems which operate efficiently and reliably with minimum attendance from the crew. An essential prerequisite to achieving this go...
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Our polyester batch operation has seen several generations of processcontrol technologies over 24 years of operation. Initial control was manual, then to partial analog, then to centralized DDC control, finally to di...
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Our polyester batch operation has seen several generations of processcontrol technologies over 24 years of operation. Initial control was manual, then to partial analog, then to centralized DDC control, finally to distributed digital control. The decision to go distributed was based on need to minimize interruptions with the best known control technologies. The paper reviews four years of experience with distributed control. The system selected consists of a host computer, two display controllers, two communication controllers, an operator interface station, one processcontroller for each line, a hot spare, and in-house diagnostics. All expectations of a distributed system have been met.
Fault detection and diagnosis are modeled as the nonlinear filtering problem of a linear system with jumping parameters. Assuming that faults occur according to a stationary finite-state Markov process, the optimal fi...
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Fault detection and diagnosis are modeled as the nonlinear filtering problem of a linear system with jumping parameters. Assuming that faults occur according to a stationary finite-state Markov process, the optimal filter is represented in terms of a vector Zakai equation. This equation can be solved explicitly in a manner that reveals both the realization as well as the physical meaning of several suboptimal filtering schemes.
作者：
Corley, Jay E.Honeywell Inc
Process Control Div Minneapolis MN USA Honeywell Inc Process Control Div Minneapolis MN USA
Microprocessor-based transmitters are a dramatic advancement in refinery technology. Standard analog transmitters communicate in only one direction, from the sensor to the control room. In contrast, microprocessor-bas...
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ISBN:
(纸本)087664826X
Microprocessor-based transmitters are a dramatic advancement in refinery technology. Standard analog transmitters communicate in only one direction, from the sensor to the control room. In contrast, microprocessor-based transmitters permit two-way communication between the transmitter and the control room - making possible remote programming, diagnostics, and decision-making. Smart transmitters promise significant productivity gains by extending the power of the microprocessor from the control room out into the plant. Citing both field studies and secondary data, this study analyzes, quantifies, and projects the improvements in refinery productivity made possible by the introduction of microprocessor-based transmitter technology.
For plants with multiple gas turbines, a second generation integrated plant condition monitoring and control system combines prime mover and driven load controls with processcontrols for the balance of plant. Project...
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