Category Archive: Advanced Control

Nov
18

Raymond D. Molloy Award

In early October, 2013, Willy Wojsznis, Mark Nixon and I were notified by the ISA Publications Department that we were the recipients of the “Raymond D. Molloy Award”. The book we co-authored, Advanced Control Foundation: Tools, Techniques, and Applications, sold the most units of any new book published by ISA in 2012. The publication award’s …

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Nov
11

Application of On-line Data Analytics to a Continuous Process Polybutene Unit

Lubrizol Corporation has installed at the Deer Park, TX plant a field trail version of Emerson’s Continuous Data Analytics capability. Over the last year Qiwei Li, production engineer, and Robert Wojewodka, Technology Manager and Statistician, have developed PCA/PLS models to predict quality parameter and detect faults for the Polybutene and refrigerant compressor units at the …

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Nov
04

Utilizing DeltaV Advanced Control Innovations

Several Meet the Expects workshops are schedule on the last day of Emerson Exchange. As part of this effort, Willy Wojsznis and I co-hosted a workshop this year titled Utilizing DeltaV Advanced Control Innovations to Improve Control Performance. In this workshop we explore and discuss innovative features of the DeltaV PID and embedded Advanced Control …

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Oct
14

Control Using Wireless Measurements

During the initial development of WirelessHart we began researching how to address control applications that use a wireless measurement and/or wireless actuator. To extend battery life a wireless transmitter may be setup to communication the measurement value much slower than the update rate of a wired installation. Also, when the transmitter supports Window communications (as …

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Oct
07

Addressing Control in the Presence of Process and Measurement Noise

When a measurement used in a control application is characterized by a significant amount of process or measurement noise then to avoid taking control action on noise filtering may be applied in the transmitter or in the control system. However, when traditional filtering techniques are used it is necessary to increase the PID reset time …

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Sep
30

Meet The Expert Workshops – Emerson Exchange

On the last day of Emerson Exchange, Friday, October 5, a number of Meet the Expert workshops are scheduled.  This year the future architecture team will host two Meet the Expert workshops:  MTE-5524 – Utilizing DeltaV Advanced Control Innovations to Improve Control Performance | Terry Blevins, Willy Wojsznis at 8-9:30am in Dallas 4 and 10-11:30 …

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Sep
23

Continuous Data Analytics – Field Trail Results

Over the last two years the future architecture team has conducted field tests of a continuous data analytics capability for quality parameter prediction and process and measurement fault detection. This continuous data analytics capability is addressed in Chapter 9 of Advanced Control Foundation – Tools, Techniques and Applications. The workshop for this chapter is designed …

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Sep
16

Application of the Kalman Filter in Process Control

A paper published in 1960 by Rudolf Kálmán “A New Approach to Linear Filtering and Prediction Problems” is the basis for the Kalman Filter. The Kalman filter uses a dynamics model, measured control input(s) and process measurement(s) to estimate the process output. A wide variety of applications have successfully utilized Kalman filtering:  The guidance of …

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Sep
09

Control Using Wireless Measurements

A number of technical challenges must be addressed when using a wireless measurement in closed loop control. In DeltaV v11 we introduced a PID option known as PIDPlus that may be selected when a wireless transmitter is used in a control application. When the PIDPlus option is selected then the same quality control as wired …

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Sep
02

Boot Camp for New Employees

In 2012 Emerson Process Management established a boot camp for new employees. In the boot camp I teach the classes on process control. The presentation I use in boot camp is based on material and process examples from our book Control Loop Foundation – Batch and Continuous Processes. The students in the boot camp use …

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