Tag Archives | process automation

Tracy-Widom-distribution-based-fault-detection-approach-application-to-f16-aircraft-sensor-actuator-fault-detection

Tracy-Widom Approach to F-16 Aircraft Sensor-Actuator Fault Detection

Abstract: The fault detection approach based on the Tracy-Widom distribution is presented and applied to the aircraft flight control system. An operative method of testing the innovation covariance of the Kalman filter is proposed. The maximal eigenvalue of the random Wishart matrix is used as the monitoring statistic, and the testing problem is reduced to determine […]

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low-flow-cut-off-calibration-table-graph

How Does Low Flow Affect Differential Pressure Flowmeter Calibration?

For flowmeter calibration, the phenomenon of “low flow cut-off” is only associated with differential pressure transmitters with square root extraction — if the square root (flow) calculation is done in the control system (DCS/PLC), then this test approach does not apply. The graphic below illustrates the issue. Some may ask why we are testing the […]

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volunteer-create-ISA-leaders

The Decision to Volunteer: The Why, How, and a Personal Call to Action

In their book, The Decision to Volunteer: Why People Give Their Time and How You Can Engage Them, Beth Gazley and Monica Dignam used research on associations to better understand why members volunteer for professional societies such as ISA.  Their research indicated that volunteers contribute their time for both altruistic (other-serving) and instrumental (self-serving) reasons.  […]

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event-triggered-control-design-of-linear-networked-systems-with-quantizations

Event-Triggered Control Design of Linear Networked Systems with Quantizations

Abstract: This paper is concerned with the control design problem of event-triggered networked systems with both state and control input quantizations. Firstly, an innovative delay system model is proposed that describes the network conditions, state and control input quantizations, and event-triggering mechanism in a unified framework. Secondly, based on this model, the criteria for the asymptotical […]

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automatic-subsea-blowout-preventer-stack-control-system-PLC-based-SCADA

Automatic Subsea Blowout Preventer Stack Control System Using PLC-based SCADA

Abstract: An extremely reliable remote control system for subsea blowout preventer stack is developed based on the off-the-shelf triple modular redundancy system. To meet a high reliability requirement, various redundancy techniques such as controller redundancy, bus redundancy and network redundancy are used to design the system hardware architecture. The control logic, human-machine interface graphical design and […]

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benefits-isa-membership

How Can ISA Best Meet My Needs?

How can ISA help me?  This is a question we hear from automation professionals, members, and volunteer leaders.  As a section leader, it is a question that I have also asked in the hope of helping me better perform my volunteer role.  There is no simple one-line answer, but let me provide a few common […]

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boiler-turbine-PID-controller-power-station

Simultaneous Gains Tuning in Boiler-Turbine PID-based Controller Clusters

Abstract: Tuning a complex multi-loop PID based control system requires considerable experience. In today’s power industry the number of available qualified tuners is dwindling and there is a great need for better tuning tools to maintain and improve the performance of complex multivariable processes. Multi-loop PID tuning is the procedure for the online tuning of […]

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industrial-automation-security-cybersecurity

How to Improve Industrial Automation Security

The history of industrial automation fascinates me. Continuous innovation and new technologies have taken manufacturing processes that originated in the Industrial Age and catapulted them straight into the information age. Just as productivity seemed to be topping out, the Internet helped boost productivity and efficiency to previously unimaginable levels. Unfortunately, as industrial automation roared into […]

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An-opto-isolator-based-linearization-technique-of-a-typical-thyristor-driven-pump

Opto-Isolator Based Linearization Solution for a Thyristor-Driven Pump

Abstract: A thyristor driven pump is operated by varying the DC input signal in the firing circuit of thyristor drive. This operation suffers from difficulties due to the nonlinear relation between thyristor output and DC input. In the present paper, an opto-isolator based linearization technique of a typical thyristor driven pump has been proposed.   The […]

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