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Temperature Sensor Installation for Best Response and Accuracy

The installation of the sensor can introduce errors, noise, and dynamics causing poor measurement and control loop performance. Here we look at best practices to get the most out of the inherent capability of the sensor. My next post will provide guidance on the communication of the sensor signal to the control room to provide […]

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ISA Sharpens Its Focus On Achieving Its Strategic Goals

For this post, I want to provide an update on ISA’s Executive Summit, which was held in Greensboro, N.C., 24-25 January 2015. Participants included the 2015 Executive Board members, Assembly Chairs, Strategic Planning VP and VP-Elect, and certain staff. The purpose of the Executive Summit was to bring participants together to review strategic goals and […]

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Integrating Multigenerational Automation Systems

Process manufacturing plants are famous, some would say notorious, for their tendency to keep automation systems and associated networks up and running for decades. Some estimates suggest that easily half of the automation systems controlling plants in North America have parts that are at least 20 years old, and 30-year old systems are not rare. […]

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Templated Manufacturing Systems: Are They Worth The Extra Effort?

Before we get started, I should clarify what I mean by “templated manufacturing systems.” First we’ll look at the type of systems that I categorize as manufacturing systems. Then I want to discuss the approaches used to design and develop a profitable system for a manufacturing company. Lastly, if a template approach is extra effort […]

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Fault Detection and Diagnosis for Non-Gaussian Stochastic Distribution Systems With Time Delays via RBF Neural Networks

Abstract: A new fault detection and diagnosis (FDD) problem via the output probability density functions (PDFs) for non-gausian stochastic distribution systems (SDSs) is investigated. The PDFs can be approximated by radial basis functions (RBFs) neural networks. Different from conventional FDD problems, the measured information for FDD is the output stochastic distributions and the stochastic variables […]

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Temperature Communication for Best Accuracy and Reliability, and Least Noise

Communication from the temperature sensor to the control room should be designed to provide the greatest accessibility, flexibility, reliability, and accuracy. What was traditionally thought to be the least expensive solution has severe ramifications and hidden costs. Here we look at how the advent of smart transmitters and wireless communication has opened the door to […]

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The Proper Implementation and Common Mistakes of Sequential Function Charts

In December 1993, the International Electrotechnical Commission (IEC) recognized five standard programming languages that could be used for implementing either process or discrete programmable controllers. The IEC is an organization that prepares and publishes international standards for all electrical, electronic, and related technologies, including controllers. The organization identified five programming languages and their common abbreviations […]

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Experimental Verification of SMC with Moving Switching Lines Applied to Hoisting Crane Vertical Motion Control

Abstract: In this paper we propose sliding mode control strategies for the point-to-point motion control of a hoisting crane. The strategies employ time-varying switching lines (characterized by a constant angle of inclination) which move either with a constant deceleration or a constant velocity to the origin of the error state space. An appropriate design of […]

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Industrial Big Data Analytics: Present and Future

We have come a long way from dumping information into databases never to be seen or heard from again, but we still have a long way to go. Today’s software infrastructures for remote monitoring and diagnostics (RM&D) are moving from analyzing real-time data to mining larger data sets for additional knowledge of equipment. Industrial big […]

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