Explanipedia

Robustness evaluation of different controllers in the presence of flow rate variations Open

Claudio Scali, Riccardo Bacci di Capaci, Gabriele Pannocchia · 2021

This paper proposes a direct approach to evaluate achievable robustness to flow rate variations of different controllers (PID and advanced algorithms), for typical process dynamics (First Order Plus Time Delay with different time delay/lag…

An Automatic System for Modeling and Controlling Color Quality of Dyed Leathers in Tanneries Open

Riccardo Bacci di Capaci, Gabriele Pannocchia, Colm Kenny, Giacomo Pacchi, R Lupi , et al. · 2021

This paper presents an automatic system for modeling and controlling color quality of dyed leathers of an Italian tannery. The proposed software is implemented within the IT company system, and is fully integrated with the machineries of t…

A Cloud-Based Monitoring System for Performance Assessment of Industrial Plants Open

Riccardo Bacci di Capaci, Claudio Scali · 2020

The paper presents the realization of a control-loop performance monitoring system operating in a cloud as a single unity for the global supervision of data coming from various industrial plants located in different areas. This is a desira…

A technological demonstrator for cloud-based performance monitoring and assessment of industrial plants: present architecture and future developments Open

Riccardo Bacci di Capaci, Claudio Scali, Carlo Vallati, Giuseppe Anastasi · 2020

This paper presents the actual status and future developments of a technological demonstrator of key enabling technologies of Industry 4.0. The final scope of the project is the realization of a platform where different solutions addressin…

Enhancing MPC formulations by identification and estimation of valve stiction Open

Riccardo Bacci di Capaci, Marco Vaccari, Claudio Scali, Gabriele Pannocchia · 2019

Numerical Investigation of the Mixing of Highly Viscous Liquids with Cowles Impellers Open

Matteo Antognoli, Chiara Galletti, Riccardo Bacci di Capaci, Gabriele Pannocchia, Claudio Scali · 2019

This work is aimed at investigating the mixing process of highly viscous paints, used to colour leathers in the tanning industry, through Computational Fluid Dynamics (CFD). In particular, a mixing tank is fed with a master liquid and diff…

An augmented PID control structure to compensate for valve stiction Open

Riccardo Bacci di Capaci, Claudio Scali · 2018

It is well-known that valve stiction causes sustained oscillations on process variables when a traditional PID controller is implemented in the feed-back loop. In the literature, there is a vast collection of solid techniques to compensate…

Identification and estimation of valve stiction by the use of a smoothed model Open

Riccardo Bacci di Capaci, Marco Vaccari, Gabriele Pannocchia, Claudio Scali · 2018

Stiction in control valves is considered one of the most common causes of poor performance in control loops. Thus, non-invasive, reliable and efficient methods which can detect and quantify this malfunction are highly desirable in the proc…

Process control performance evaluation in the case of variable set‐point with experimental applications Open

Riccardo Bacci di Capaci, Claudio Scali · 2017

The purpose of this paper is to contribute with some refinements to recent methods of analysis of control loop performance, based on the well‐established principle of Internal Model Control (IMC). Lower limits for the absolute value of the…

Performance Improvements of Cascade and Feed-forward Control Schemes for Industrial Processes Open

Riccardo Bacci di Capaci, Claudio Scali · 2017

In this paper a comparison among different control schemes, frequently implemented in industrial processes is presented. These control structures range from simple configurations to complex structures, in order to reproduce problems to be …

System identification applied to stiction quantification in industrial control loops: A comparative study Open

Riccardo Bacci di Capaci, Claudio Scali, Gabriele Pannocchia · 2016

A Revised Technique of Stiction Compensation for Control Valves Open

Riccardo Bacci di Capaci, Claudio Scali, Biao Huang · 2016

A well-established compensation technique to remove oscillations caused by control valve stiction is the two-moves method. However, the actual versions of this technique present major drawbacks, as the long time for implementation and, mos…

PERFORMANCE ASSESSMENT OF CONTROL LOOPS: controller evaluation for frequent set-point changes Open

Riccardo Bacci di Capaci, Claudio Scali · 2016

The high seasonality and variability of electricity production from renewable sources has enormous \nimpact on both production and distribution networks. Among the many aspects, several traditional \npower plants, especially, combined cycl…

RETRACTED: Review on Valve Stiction. Part I: From Modeling to Smart Diagnosis Open

Riccardo Bacci di Capaci, Claudio Scali · 2015

Valve stiction is indicated as one of the main problems affecting control loop performance and then product quality. Therefore, it is important to detect this phenomenon as early as possible, distinguish it from other causes, and suggest t…

Radio Frequency heating for oil recovery and soil remediation Open

Matteo Bientinesi, Claudio Scali, Luigi Petarca · 2015

The paper presents basic principles of RF heating and describes its possible applications for oil extraction and soil remediation, based on the experience obtained by several years of work at Consorzio Polo Tecnologico Magona (CPTM). Activ…

A System for Advanced Performance Monitoring: Application to Complex Plants of the Chemical Industry Open

Riccardo Bacci di Capaci, Claudio Scali, Emilio Rossi, F. Gomiero, Ana M. Pagano · 2015

This paper illustrates the results of the off-line application of an advanced performance monitoring system to complex plants of the chemical industry. The system analyses data recorded by the DCS during routine operations and issues autom…

Identification techniques for stiction quantification in the presence of nonstationary disturbances Open

Riccardo Bacci di Capaci, Claudio Scali, Gabriele Pannocchia · 2015

The paper presents a detailed comparison of different identification techniques applied to valve stiction quantification, possibly in the presence of nonstationary unknown disturbances. The control loop with sticky valve is modeled as a Ha…

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