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Influence of Time and Length Size Feature Selections for Human Activity Sequences Recognition

Abstract: In this paper, Viterbi algorithm based on a hidden Markov model is applied to recognize activity sequences from observed sensors events. Alternative features selections of time feature values of sensors events and activity length size feature values are tested, respectively, and then the results of activity sequences recognition performances of Viterbi algorithm are evaluated. The […]

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Robotic arm holding light bulb

What is Automation?

In my last post, I shared details about ISA’s Summer Leaders Meeting (SLM), including our first Automation Advisory Council meeting and the strategic visioning and planning sessions that were held and next steps. In that meeting we discussed how ISA’s use of the words “automation” and “automation professional” might make some members of ISA (and […]

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Engineers using tablet on wind turbine site

September Educational Opportunities from ISA

For four consecutive weeks this fall, ISA industrial automation experts will be in Houston, Tex. to lead the world-class technician skills, automation engineering and safety courses. ISA Technical Training Camp is your opportunity to take multiple ISA training courses at one location, and at a discounted rate. The program, which includes pre-arranged local plant tours […]

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Industrial worker in control room

The Road to High Performance Graphics

Are you considering implementing high-performance graphics (HPG) or abnormal situation management graphics? If so then you are part of a fast growing list of manufacturers trying to gain a competitive edge. Three types of companies and their road to achieve HPG are described here. The first company is a firm believer in the concepts and […]

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Hydraulic Tubes

Linear Relationships Between Limited Pressure Difference and Coil Current of On/Off Valves

Abstract: On/off solenoid valves with PWM control are widely used in all types of vehicle electro-hydraulic control systems respecting to their desirable properties of reliable, low cost and fast acting. However, it can hardly achieve a linear hydraulic modulation by using on/off valves mainly due to the nonlinear behaviors of valve dynamics and fluid, which affects […]

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Chemistry Lab Testing pH

What are the Essentials of pH in Industrial Applications?

The pH electrode offers by far the greatest sensitivity and rangeability of any measurement. To make the most of this capability requires an incredible precision of mixing, reagent manipulation, and nonlinear control. pH measurement and control can be an extreme sport. At the neutral point, the concentration of hydrogen and hydroxyl ions is by definition […]

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Career Direction

Career Advice for Someone Beginning an Engineering Education

I have had a typical 37-year engineering career that I have thoroughly enjoyed, split between project engineering, production, production management, and consulting. I was recently asked for some general advice, from a nephew beginning an engineering education. Here is my reply: Engineering is a wonderful career if you have a technical mindset. Consider your engineering […]

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wind turbine generator

Real Time Simulation of Nonlinear Generalized Predictive Control for Wind Energy Conversion System

Abstract: In order to make a wind power generation truly cost-effective and reliable, an advanced control techniques must be used. In this paper, we develop a new control strategy, using nonlinear generalized predictive control (NGPC) approach, for double fed induction generator-based wind turbine. The proposed control law is based on two points: NGPC-based torque-current control […]

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Security Breach

Urgent Need for Automation Systems Cyberprotection

Widespread global awareness of threats to information systems (IS) has led government and business to focus significant attention and resources on IS cybersecurity. The same cannot be said regarding industrial automation systems, where there is an urgent need to focus on the cyberprotection of critical industrial control systems. The U.S. Department of Homeland Security has […]

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Hybrid Temperature Controllers Offer More Versatility

Many process plant units have temperature loops that must be monitored and controlled. If these units are self-contained to some degree, as with a process skid or a remote unit, they often have just a few discrete and analog I/O points that must be monitored and controlled in addition to temperature. These units also often […]

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