Tag Archives | process automation


Diagnosis of Broken-Bars Fault in Induction Machines Using Higher Order Spectral Analysis

Abstract: Detection and identification of induction machine faults through the stator current signal using higher order spectra analysis is presented. This technique is known as motor current signature analysis (MCSA). This paper proposes two higher order spectra techniques, namely the power spectrum and the slices of bi-spectrum used for the analysis of induction machine stator current […]

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Simple Enhancement of PID Control

The venerable PID is assuredly the most widely used algorithm in industrial process control. Its simplicity, reliability and familiarity make it a staple for closed-loop control throughout the industrialized world. Many control engineers apply this tool to every process or system requiring closed-loop control. Despite this default status as the “go-to” solution for feedback control, […]

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Optimize Your Industrial Automation System with a Resilient Design Strategy

In a previous post regarding good automation system design concepts considered the issue of robust design at the controller and communication levels. This time we shift the focus to software best programming practices, both at the controller and the operator interface levels, which can help result in a solid automation system. Probably the No. 1 […]

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An Opportunity to Celebrate ISA’s Successes and Build on Its Achievements

The Fall Leaders Meeting, held 10–13 October, 2015 in Louisville, Kentucky—my hometown—was an agenda-packed event attended by ISA’s Executive Board members; Geographic, Operational and Technical Assembly members; department and division directors; committee members; section leaders and delegates; honorees; and guests. It was a great opportunity to celebrate the Society’s successes to date in 2015—of which […]

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ISA Is Much More Than a Membership Organization

It’s fitting, I believe, that this column is being posted in November—the month that ISA and the Automation Federation have designated as Automation Appreciation Month. Automation Appreciation Month provides ISA with an opportunity to thank its members for their strong support, active involvement, and leadership contributions. In addition, the month celebrates the value and significance […]

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Design Automation Systems with a Focus on Diagnostics and Situational Awareness

My first post regarding good automation system design concepts approached the issue of robust design from the field level, looking at field devices and wiring practices. This time we move up the automation food chain to look at the control platform, which is made up of controllers, input/output (I/O) modules, and the networking means that […]

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Fuzzy Model Based Adaptive PID Controller Design for Nonlinear and Uncertain Processes

Abstract: We develop a novel adaptive tuning method for classical proportional–integral–derivative (PID) controller to control nonlinear processes to adjust PID gains, a problem which is very difficult to overcome in the classical PID controllers. By incorporating classical PID control, which is well-known in industry, to the control of nonlinear processes, we introduce a method which can […]

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Is There Enough Focus on Cybersecurity for Municipal Infrastructure?

The volumes of information written about cybersecurity can be mind-boggling. The subject has important implications for everyone, especially for those of us involved with industrial control systems and software-based automation of water, sewer and electric systems. Legacy control systems have always been vulnerable because they weren’t designed with cyber attacks in mind. They were designed […]

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Automation Engineering Design Must Protect Against the Unexpected

Anyone can drive down a wide-open, well maintained road on a lovely day. But it requires a higher level of skill to avoid disaster when there is traffic, construction and bad weather. Similarly, good engineering for automation projects requires us to think beyond the normal everyday conditions and make sure we are designing to protect […]

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