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Some issues on AI techniques in RT process control

Annual Reviews in control 1999年第0期23卷 125-137页

作者： Albertos, P. Picó, J. Navarro, J.L. Crespo, A. Dept. of Systems Engineering and Control Universidad Politécnica de Valencia Spain Dept. of Computer Engineering Universidad Politécnica de Valencia Spain

The use of AI techniques in control raises the problem of implementing operations with not well bounded and defined computing time, in a real time framework. In this paper, the combined used of conventional and AI control strategies at different levels of process control is analyzed. Each control activity is split into a number of tasks, involving mandatory and optional computations. The main time constraints as well as some structures, namely the integrated and the hierarchical control structures, are reviewed and some solutions to guarantee the response time are proposed. Two applications in the control of industrial kilns are also discussed.

关键词： Process control

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Application of fuzzy logic in weighted information of fusion fingerprints and palm prints

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Journal of Harbin Institute of Technology(New Series) 2006年第6期13卷 715-717页

作者：杨帆浦昭邦陈世哲 Dept. of Automatic Testing and Control Harbin Institute of Technology Information Engineering College Hebei Institute of Technology Tianjin 300130 China

It is a developing job to distinguish identifications with information fusion of fingerprints and palm prints. It is also a very effective way to resolve the problem of low identification rate and low stability of single biology characteristic identification. Based on the theory of fuzzy logic theory, we bring out the method of obfuscating weigh coefficient and reliability to fuse the information of fingerprints and palm prints to realize high identification rate. The experiment proves the feasibility and effectiveness of this method and the identification rate can be more than 90%, which contributes useful experience to the research of identification using biology characteristics.

关键词： fuzzy logic weighted information fusion identity discrimination

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Hybrid geno-fuzzy controller for seismic vibration control

Hybrid geno-fuzzy controller for seismic vibration control

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2012 UKACC International Conference on control, control 2012

作者： Patrascu, Monica Dumitrache, Ioan Dept. of Automatic Control and Systems Engineering University Politehnica of Bucharest Bucharest Romania

ISBN: (纸本)9781467315609

This paper evaluates the possibility of applying a geno-fuzzy control strategy to a magnetorheological semi-active damper for seismic vibration control. The proposed control starategy is designed and then tested and validated in a simulated environment. The control strategy is validated by considering a more destructive seismic disturbance as input for the damper-structure system. The proposed geno-fuzzy hybrid controller offers improved performance and implementability for real-time applications. © 2012 IEEE.

关键词： Vibration control

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Zero-Shot Learning for Intelligent Fault Detection 27

Zero-Shot Learning for Intelligent Fault Detection

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27th International Conference on Automation and Computing, ICAC 2022

作者： Zhang, Siyu Wei, Hua-Liang University of Sheffield Dept. Automatic Control and Systems Engineering Sheffield United Kingdom

ISBN: (数字)9781665498074

ISBN: (纸本)9781665498074

Signal-based fault detection, as an essential technology in many engineering and industrial applications, has received extensive attention. Nevertheless, in a real-world application setting, collecting samples for some specific types of faults may be time-consuming and damaging, implying that samples of unseen faults may be unavailable in the training step. Keeping this in mind, we present a new semantic space-based zero-shot learning (SSB-ZSL) method for fault detection. The implementation of the method comprises three phases: feature extraction, human-defined semantic space, and a feature embedding model to address this issue. To evaluate the proposed method, we carry out experiments on two real datasets: a vibration-based rolling element bearing dataset from Case Western Reserve University, and an acoustic-based air compressor fault dataset. The results are promising and significantly better than that given by the compared state-of-the-art methods, showing that the proposed method can effectively detect unseen types of faults in the absence of their samples. © 2022 IEEE.

关键词： Fault detection

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A droop controller achieving proportional power sharing without output voltage amplitude or frequency deviation

A droop controller achieving proportional power sharing with...

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作者： Zeng, Yu Zhong, Qing-Chang Dept. of Automatic Control and Systems Engineering University of Sheffield Sheffield United Kingdom

ISBN: (纸本)9781479956982

The droop controller is widely used for the parallel operation of inverters. However, the conventional droop controller has a trade-off between the power sharing and the regulations of the output voltage amplitude and frequency. In order to remove this trade-off, a new droop controller is presented in this paper. This method adopts the structure of the robust droop controller and utilizes the transient droop characteristic, which enables proportional power sharing without output voltage amplitude or frequency deviation. Simulation results are provided to demonstrate the feasibility and excellent performance of the proposed controller. © 2014 IEEE.

关键词： controllers

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Assessing Uncertainty in Space Weather Forecasting Using Quantile Regression and Complex Nonlinear Systems Identification Techniques 6

Assessing Uncertainty in Space Weather Forecasting Using Qua...

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6th International Conference on Computing, Electronics and Communications engineering, iCCECE 2023

作者： Wei, Hua-Liang Balikhin, Michael A. Boynton, Richard J. Walker, Simon N. The University of Sheffield Dept. of Automatic Control and Systems Engineering Sheffield United Kingdom

ISBN: (纸本)9798350340921

Space weather forecasting is of global interest, and its importance is well established in research community and recognized by government, industries and stockholders. Over the past years, many types of predictive models have been developed in the literature. There is a general agreement that forecasting models should not only provide point prediction but also inform the uncertainty associated with the prediction. This study presents a novel method bases on quantile regression and complex dynamic modelling for measuring uncertainties in space weather forecasting. The approach is implemented using Quantile regression and Nonlinear AutoRegressive Moving Average with Exogenous inputs (NARMAX) methods (for short the approach is called Q-NARMAX). The method is applied to Disturbance storm index (Dst) observations to examine its interpretability and capability for uncertainty analysis. Results show that the proposed Q-NARX model can produce excellent predictions of the Dst index, and meanwhile provides a measure for assessing the uncertainty in the forecast. The innovative integration of quantile regression, complex dynamic modelling and nonlinear system identification techniques enables the proposed work to have following attractive advantages and properties: 1) it can produce excellent prediction accuracy for space weather forecasting, 2) it uses transparent models to approximate (represent) black-box systems, enabling to interpret the dependent relationship between space weather indices (system outputs) and their drivers (system inputs), and 3) more importantly, it allows for uncertainty assessment and analysis of models and forecasts. © 2023 IEEE.

关键词： Uncertainty analysis

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On the integration of skilled robot motions for productivity in manufacturing

On the integration of skilled robot motions for productivity...

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IEEE International Symposium on Assembly and Manufacturing

作者： Bjorkelund, Anders Edstrom, Lisett Haage, Mathias Malec, Jacek Nilsson, Klas Nugues, Pierre Robertz, Sven Gestegard Storkle, Denis Blomdell, Anders Johansson, Rolf Linderoth, Magnus Nilsson, Anders Robertsson, Anders Stolt, Andreas Bruyninckx, Herman Dept. of Computer Science Lund University Sweden Dept of Automatic Control Lund University Sweden Dept. of Mechanical Engineering K.U. Leuven Belgium

ISBN: (纸本)9781612843438

Robots used in manufacturing today are tailored to their tasks by system integration based on expert knowledge concerning both production and machine control. For upcoming new generations of even more flexible robot solutions, in applications such as dexterous assembly, the robot setup and programming gets even more challenging. Reuse of solutions in terms of parameters, controls, process tuning, and of software modules in general then gets increasingly important. There has been valuable progress within reuse of automation solutions when machines comply with standards and behave according to nominal models. However, more flexible robots with sensor-based manipulation skills and cognitive functions for human interaction are far too complex to manage, and solutions are rarely reusable since knowledge is either implicit in imperative software or not captured in machine readable form. We propose techniques that build on existing knowledge by converting structured data into an RDF-based knowledge base. By enhancements of industrial control systems and available engineering tools, such knowledge can be gradually extended as part of the interaction during the definition of the robot task. © 2011 IEEE.

关键词： Manufacture

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Design and implementation of new delay-efficient/configurable multiplier using FPGA 12

Design and implementation of new delay-efficient/configurabl...

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12th International Conference on computer engineering and Systems, ICCES 2017

作者： El Atre, Soad Gamal Mohamed Alshewimy, Mahmoud A. M. Computers and Automatic Control Dept. Faculty of Engineering Tanta University Tanta Egypt

ISBN: (纸本)9781538611913

New delay-efficient configurable multiplier based on Modified Booth's Algorithm (MBA) and Wallace Tree (WT) structure for multiplying two m-bit operands - where m ranges from 8-bit to 128-bit - is introduced. WT structure has been used to reduce the number of sequential adding stages and speed improvements have been achieved. Modifying Booth's multiplier architecture at a fundamental level is an advantageous concept that sets FPGA based multiplier models apart from rigid-architecture conventional multipliers. In the context of this work, various multipliers, based on MBA and WT, have been developed with the smallest possible time delay. Comparisons have been made between the proposed multiplier implementations and those found in the literature. The comparative results show that the proposed multiplier introduces delay improvement reaches % 42.64. © 2017 IEEE.

关键词： Field programmable gate arrays (FPGA)

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Design and performance analysis of networked control systems with random delay

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Journal of Systems engineering and Electronics 2009年第4期20卷 807-822页

作者： Xia Yuanqing Fu Mengyin Liu Bo Liu Guoping Dept. of Automatic Control Beijing Inst. of Technology Beijing 100081 P. R. China Dept. of Engineering Univ. of Glamorgan Pontypridd CF37 1DL U. K.

The design and performance analysis of networked control systems with random network delay in the forward channel is proposed, which are described in a state-space form. A new control scheme is used to overcome the effects of network transmission delay, which is termed networked predictive control （NPC）. Furthermore, three different ways to choose control input are discussed and the performances are analyzed, respectively. Both real-time simulations and practical experiments show the effectiveness of the control scheme.

关键词： networked control system. Dredictive control random network delay stability

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Low-order model for tokamak plasma current control

Low-order model for tokamak plasma current control

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ICCAS-SICE 2009 - ICROS-SICE International Joint Conference 2009

作者： Garrido, Aitor J. Garrido, Izaskun Sevillano, M. Goretti Amundarain, Modesto Alberdi, Mikel Barambones, Oscar Martija, Itziar Dept. of Automatic Control and Systems Engineering EUITI de Bilbao UPV/EHU Spain Dept. of Automatic Control and Systems Engineering EUI de Vitoria UPV/EHU Spain Dept. of Mechanical Engineering EUITI de Bilbao UPV/EHU Spain

ISBN: (纸本)9784907764296

Nowadays there exists a need of carrying out new features and improvements in the existing and future tokamak devices as ITER or DEMO. The present capabilities of the control engineering and the development of fusion technologies allow the achievement new plasma configurations. These aspects, jointly with the increased performance of the computer hardware and the advances in plasma modelling and control, give a new impulse to the development of models and methods for the design of the scenario. In this sense, the present work is devoted to derive a low-order model of the plasma and surrounding conducting structure with the purpose of facilitating the control requirements in terms of plasma shape and current density profiles. © 2009 SICE.

关键词： Tokamak devices

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