Agile manifesto: Engineering, procurement, construction firm vs. systems integrator

Feb 16, 2015 7:14:00 AM | Posted by Scott Hayes

The agility described in the “Manifesto for Agile Software Development” has clear advantages, but what does it mean for production facility automation?

In February 2001, a group of software developers met at the Snowbird resort in Utah to discuss lightweight development methods. They published the Manifesto for Agile Software Development.

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PID math demystified, part 4

Jun 11, 2014 7:56:46 AM | Posted by Scott Hayes

You’ve see the equations, but have you thought about how those elements work together? Part 4: Feed forward

In the first three blog posts (see Part 1, Part 2, and Part 3) we covered the basics of PID math. We started with the basic proportional-only controller and worked in the integral and derivative components. Well before get too far, let’s review the proportional-only controller:

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PID math demystified, part 3: More on derivative control

Oct 25, 2013 4:19:27 AM | Posted by Scott Hayes

Consider how a PD controller would work, without an integral function. Would you ever want to use that approach?

To investigate how derivative action works, let’s look at a proportional derivative or PD controller. PID controllers are far more

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PID Math Demystified (Part 2)

May 14, 2013 3:33:00 AM | Posted by Scott Hayes

You’ve seen the equations, but have you thought about how those elements work together? Part 2: Adding integral and derivative to the mix.

Last week we started with proportional. Now let’s look at the next part of the equation, the integral component:

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PID Math Demystified (Part 1)

May 7, 2013 4:37:49 AM | Posted by Scott Hayes

You've seen the equations, but have you thought about how those elements work together? Part 1: The basic concepts and proportional control.

Most process control engineers have been exposed to the basic equation in a form that looks something like this:

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