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20th World Congress of the International-Federation-of-Automatic-Control (IFAC)

作者： Veronesi, Massimiliano Visioli, Antonio Yokogawa Italia Srl Milan Italy Univ Brescia Dipartimento Ingn Meccan & Ind Brescia Italy

New techniques based on the application of the final value theorem to suitably devised signals have been recently proposed for the process parameters estimation, performance assessment and retuning of industrial (PID) controllers. The main features of these methods are that they can be applied in closed-loop and they can exploit routine operational data. In this paper we extend this methodology to two relevant cases, that is, those related to the implementation of an internal model control system and of a feedforward control architecture for the set-point following task. Simulation results confirm the effectiveness of the overall strategy also in these cases. (C) 2017, IFAC (International Federation of Automatic Control) Hosting by Elsevier Ltd. All rights reserved.

关键词： process parameters estimation performance assessment retuning PID controllers final value theorem

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process parameters estimation, Performance Assessment and Controller Retuning Based on the Final Value Theorem: Some Extensions

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IFAC-PapersOnLine 2017年第1期50卷 9198-9203页

作者： Veronesi M. Visioli A. Yokogawa Italia srl Milan Italy Dipartimento di Ingegneria Meccanica e Industriale University of Brescia Italy

关键词： final value theorem performance assessment PID controllers process parameters estimation retuning

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Optimized Retuning of PID Controllers for TITO processses

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IFAC-PapersOnLine 2018年第4期51卷 268-273页

作者： Veronesi, Massimiliano Visioli, Antonio Yokogawa Italia srl Milan Italy Dipartimento di Ingegneria Meccanica e Industriale University of Brescia Italy

In this paper we propose a methodology to evaluate the performance of decentralized PID controllers for two-inputs-two-outputs processes and to retune the parameters. In particular, the model of the process is estimated based on a technique that exploits the final value theorem. Then, an evolutionary algorithm is applied in order to find the Pareto front by considering a multiobjective optimization problem. Finally, the performance obtained with the current tuning is compared with the optimal ones and, in case it is necessary, the PID parameters are retuned accordingly. A procedure to achieve the Nash optimal point is also proposed. © 2018

关键词： process control Controllers Electric control equipment Multiobjective optimization Proportional control systems Three term control systems Decentralized PID controller Multi objective optimization problem Optimal points Performance assessment PID controllers process parameters estimation retuning Two inputs two outputs

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Optimized Retuning of PID Controllers for TITO processses

Optimized Retuning of PID Controllers for TITO Processses

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3rd IFAC Conference on Advances in Proportional-Integral-Derivative Control (PID)

作者： Veronesi, Massimiliano Visioli, Antonio Yokogawa Italia Srl Milan Italy Univ Brescia Dipartimento Ingn Meccan & Ind Brescia Italy

关键词： TITO systems PID controllers process parameters estimation performance assessment retuning

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A novel yield optimization technique for digital CMOS circuits design by means of process parameters run-time estimation and body bias active control

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IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS 2005年第5期13卷 630-638页

作者： Olivieri, M Scotti, G Trifiletti, A Univ Roma La Sapienza Dept Elect Engn I-00184 Rome Italy

This work presents a novel approach to optimize digital integrated circuits yield referring to speed, dynamic power and leakage power constraints. The method is based on process parameter estimation circuits and active control of body bias performed by an on-chip digital controller. The associated design flow allows us to quantitatively predict the impact of the method on the expected yield in a specific design. We present the architecture scheme, the theoretical foundation, the estimation circuits used, and two application case studies, referring to an industrial 0.13-mu m CMOS process data. The approach results to be remarkably effective at high operating temperature. In the presented case study, initial yields below 14% are improved to 86% by using a single controller and a single set of estimation circuits per die.

关键词： active body bias digital CMOS circuits design process parameters estimation yield

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Advanced statistical analysis as a novel tool to pneumatic conveying monitoring and control strategy development

Advanced statistical analysis as a novel tool to pneumatic c...

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11th High Energy Physics International Conference on Quantum ChromoDynamics

作者： Romanowski, Andrzej Grudzien, Krzysztof Aykroyd, Robert G. Williams, Richard A. Tech Univ Lodz Fac Elect & Elect Engn Dept Comp Engn PL-90924 Lodz Poland Univ Leeds Sch Math Dept Stat Leeds LS2 9JT W Yorkshire England Univ Leeds Schproc Environm & Mat Engn Inst Particle Sci & Engn Leeds LS2 9JT W Yorkshire England

Behaviour of powder flow in pneumatic conveying has been investigated for many years, though it still remains a challenging task both practically and theoretically, especially when considering monitoring and control issues. Better understanding of the gas-solids flow structures can be beneficial for the design and operation of pneumatic transport installations. This paper covers a novel approach for providing the quantitative description in terms of parameter values useful for monitoring and control of this process with the use of Electrical Capacitance Tomography (ECT). The use of Bayesian statistics for analysis of ECT data allows the direct estimation of control parameters. This paper presents how this characteristic parameters estimation can be accomplished without the need for reconstruction and image post processing, which was a classical endeavour whenever tomography was applied. It is achieved using a 'high-level' statistical Bayesian modelling combined with a Markov chain Monte Carlo (MCMC) sampling algorithm. Advanced statistics is applied to data analysis for measurements coming from the part of phenomena present in the horizontal section of pneumatic conveyor during slug formation.

关键词： capacitance tomography MCMC pneumatic flow investigation process parameters estimation

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Advanced statistical analysis as a novel tool to pneumatic conveying monitoring and control strategy development

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PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION 2006年第3-4期23卷 289-296页

关键词： capacitance tomography MCMC pneumatic flow investigation process parameters estimation

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ON THE USE OF DYNAMIC INVERSION FOR THE IMPROVEMENT OF PID CONTROL

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IFAC Proceedings Volumes 2005年第1期38卷 585-590页

作者： Antonio Visioli Aurelio Piazzi Dipartimento di Elettronica per l'Automazione University of Brescia (Italy) Dipartimento di Ingegneria dell'Informazione University of Parma (Italy)

In this paper we discuss the use of a noncausal approach for the improvement of PID control, according to a method presented in (Piazzi and Visioli, 2004). In particular we verify that, despite the proposed methodology is based on an estimated first-order plus dead time (FOPDT) model of the process, different identification procedure can be employed for this purpose yielding in any case to a good result. Further, the role of the unique design parameter is analysed.

关键词： process control PID control feedforward control inversion process parameters estimation

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