Pharmaceutical machine operating

Tip #88: Use Middle Signal Selection to Improve pH Measurement Reliability

Biopharmaceutical batches are often worth more than a million dollars. The product quality of these batches is sensitive to changes of 0.1 pH and the steam sterilization of electrodes reduces the life and accuracy of a sensor that under the best of conditions is the weakest link in a control system. Yet people looking at […]

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Validation of the Laguerre model.

Decomposition of an ARX Model on Laguerre Orthonormal Bases

Abstract: In this paper, we propose a new reduced complexity model by expanding a discrete-time ARX model on Laguerre orthonormal bases. To ensure an efficient complexity reduction, the coefficients associated to the input and the output of the ARX model are expanded on independent Laguerre bases, to develop a new black-box linear ARX-Laguerre model with […]

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What are the Benefits of Migrating from an Older DCS to a New Automation System?

Many distributed control systems (DCS) in process plants are approaching the end of their useful lives, forcing facilities to migrate from an old DCS to a modern automation system. Although these migration projects require significant investment, funds spent can often be recovered quite quickly through savings from improved operations, less downtime, and decreased support costs. […]

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DC servo pendulum prototype used to carried out the actual experiments.

Output Feedback Trajectory Stabilization of the Uncertainty DC Servomechanism System

Abstract: This work proposes a solution for the output feedback trajectory-tracking problem in the case of an uncertain DC servomechanism system. The system consists of a pendulum actuated by a DC motor and subject to a time-varying bounded disturbance. The control law consists of a Proportional Derivative controller and an uncertain estimator that allows compensating the […]

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Continuous Improvement

Selecting Continuous Improvement as a New Year’s Resolution

No, this post isn’t about weight loss, cigarette smoking or exercise.  It’s about “continuous improvement” from a corporate point of view.  But they all have something in common, the need to create a habit; either a habit to promote a positive or a habit to replace a negative.  The following discusses an approach for turning […]

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Arrangement of the projectors and optical fibres

Concentration Measurements of Bubbles in a Water Column Using an Optical Tomography System

Abstract: Optical tomography provides a means for the determination of the spatial distribution of materials with different optical density in a volume by non-intrusive means. This paper presents results of concentration measurements of gas bubbles in a water column using an optical tomography system. A hydraulic flow rig is used to generate vertical air-water two-phase […]

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How Can Software Support Next-Generation People-Centric Manufacturing?

Are you ready for people-centric manufacturing? If this question sounds crazy, realize that other industry analysts are thinking this way too. These analysts are not stuck in 1960s manufacturing; people-centric manufacturing does not mean labor-intensive manufacturing. There are fewer people doing more production work every day. Yet, leaders are focusing on their employees, making sure […]

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