Steve Prettyman

Knowing Your Blind Spots with Your Manager

There’s nothing worse in one’s work life than when the relationship with one’s manager is not working correctly.   No matter what the reason, it causes stress during the work day, and it can affect one’s career path in the organization when the relationship is not working as well as it could be.   At the same […]

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ISA2011-458sm Wilbanks Cropped

Andy Chatha Awarded ISA Honorary Membership

The 2011 Annual ISA Honors and Awards Gala was held on 17 October in Mobile, Alabama. The Honors and Awards program provides an opportunity for ISA to recognize outstanding individuals for the contributions they have made to the Society and/or the automation industry. Society and industry leaders from across the world gathered to celebrate and […]

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Many of the real costs of downtime are hidden in other cost areas and do not show up unless you account for them properly.

How Much Is Downtime Costing You?

Take a look at the important components of total downtime cost. As you read the list, assess whether your downtime number fully includes these issues. Equipment related costs Annually calculated as a constant unit price Labor cost: Account for the full cost of direct and indirect labor with benefits, and include a share of all […]

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Fig. 1. Feedback control system with a gain phase margin tester.

Robust PID Tuning Strategy for Uncertain Plants Based on the Kharitonov Theorem

Abstract: In this paper, the Kharitonov theorem for interval plants is exploited for the purpose of synthesizing a stabilizing controller. The aim here is to develop a controller to simultaneously stabilize the four Kharitonov-defined vortex polynomials. Different from the prevailing works, the controller is designed systematically and graphically through the search of a non-conservative Kharitonov region […]

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New Enterprise-Control System Integration Standard Issued for Review/Voting

A new draft standard in the widely used ISA-95 series has been issued for ISA95 committee balloting, as well as ISA and ANSI public review. ISA-d95.00.04, “Enterprise-Control System Integration: Part 4: Objects and Attributes for Manufacturing Operations Management Integration,” defines business-to-object models and attributes of the object models that define some of the information exchanged […]

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Energy harvesting is the extraction of usable energy (usually converted into electrical energy) from otherwise wasted energy available in the environment.

Energy Harvesting: Practical Reality for Wireless Sensing

What is energy harvesting? Energy harvesting is the extraction of usable energy (usually converted into electrical energy) from otherwise wasted energy available in the environment. On the macro scale (MegaWatts – MW) this includes hydro-electricity, wave power, solar panels, and wind turbines. However for wireless sensing, we are talking about harvesting immediately available energy such […]

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