Oil and gas processing plant

ISA Automation Week Revisited Comes to Canada

Plant managers, engineers and technicians all work hard to lower operating costs, reduce or eliminate downtime, optimize processes, and safeguard data and networks from cyber-intruders – all the while keeping personnel safety as a top priority.  Whew!  That’s a tall order, and the solutions are often complex and overlapping.  The daunting task of simultaneously keeping […]

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Brewery contol display

Tip #95: Use External-Reset Feedback for Cascade Control and Slow Final Control Elements

The value of the external-reset feedback feature in PID controllers is becoming increasingly apparent to me. I got a preview of its importance when I found that 1980s vintage DCS required a fix for override control that was addressed in the next generation of DCS by this feature. This wakeup call was followed by the […]

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Electronics manufacturing

The Top Four Criteria for Manufacturing Software Comparison

By now many companies understand the potential benefits that can stem from implementing manufacturing operations management (MOM) software applications. The space is maturing; technology is advancing; and the benefits will only increase as solution integration capabilities, mobility, user interfaces, and other aspects progress. Although automating, centralizing, and standardizing processes can improve performance, the reality is […]

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Losing time

A Delay Decomposition Approach to Robust Stability Analysis of Uncertain Systems

Abstract: This paper is concerned with delay-dependent robust stability for uncertain systems with time-varying delays. The proposed method employs a suitable Lyapunov–Krasovskii’s functional for new augmented system. Then, based on the Lyapunov method, a delay-dependent robust criterion is devised by taking the relationship between the terms in the Leibniz–Newton formula into account. By developing a […]

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Colorful pipes

Tip #84: Use Signal Characterization in the DCS to Linearize Valve Installed Flow Characteristic

Signal characterization to linearize valve installed flow characteristic has a bad reputation due to some practical implementation problems. These problems can be addressed today by doing the characterization in the distributed control system (DCS), but the stigma remains. With pneumatic positioners, signal characterization was done by the use of a cam. Standard cams were based […]

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Check engine light in yellow on automobile dashboard

Are Smart Devices in a Plant Your Most Valuable Assets?

Think of the usefulness of the diagnostics in your automobile: Few of us know or even care about the hundreds of functions being carried out by a car’s “brain” under the hood.  On-board diagnostic (OBD) systems give the vehicle owner or repair technician access to the status of the various vehicle subsystems. Modern OBD implementations […]

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ISA_home_page_upper1

A Sneak Preview of ISA’s New Website and Enhanced User Experience

The International Society of Automation has been putting the finishing touches on a brand new website, the customer − and member − facing portal that showcases all of ISA’s products, services, and technical information to the world. Behind the new website is a brand new, state-of-the-art association management system, which fulfills a similar purpose to […]

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