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7th IEEE Data Driven control and Learning Systems Conference, DDCLS 2018

作者： Tengfei, Zhang Xing, Fang Fei, Liu Key Laboratory of Advanced Process Control for Light Industry Jiangnan University Institute of Automation Wuxi Jiangsu214122 China

ISBN: (纸本)9781538626184

A feed-forward compensation strategy for the disturbance is proposed for the control problem of the bacteria in the fermentation process of the penicillin. Firstly, the nonlinear disturbance observer is designed to estimate the lumped disturbance of the system. Then, a sliding mode control law is designed for the system. The design of the control law guarantees the closed-loop system is asymptotically stable and achieves the purpose of tracking control for the bacteria's concentration in the system. The simulation results show that this method can enhance the anti-disturbance capability and improve the control performance of the system. © 2018 IEEE.

关键词： Sliding mode control

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Disturbance observer and ageing estimation for a temperature controlled food transporter

Disturbance observer and ageing estimation for a temperature...

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2018 SICE International Symposium on control Systems, SICE ISCS 2018

作者： Luchini, Elisabeth Kozek, Martin Institute of Mechanics and Mechatronics Division of Control and Process Automation Getreidemarkt 9/325-A5 ViennaA-1060 Austria

ISBN: (纸本)9784907764586

Temperature control of a food transport system with an insulated cool box (ICB) can be efficiently provided by model predictive control (MPC). However, disturbances like solar irradiation or deterioration of the heat transfer coefficient α of the ICB are typically not detected by sensors. In this paper a disturbance observer for solar irradiation is used to design a fast sampled disturbance compensation obtaining a fast response of the system. Two specific characteristics of the disturbance are utilized to estimate α: 1) During nighttime solar irradiation has its minimum. 2) α declines at a very slow rate. The MPC, irradiation estimation, and α estimation are implemented with different sampling rates. This enables separate and robust estimation and efficient implementation. The system and control architecture is presented, the concept of the observer and estimation is given and simulation results demonstrate the performance of the concept. © 2018 The Society of Instrument and control Engineers - SICE.

关键词： Model predictive control

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Dead-Time Compensator for State-delay Stable Systems

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IFAC-PapersOnLine 2018年第18期51卷 672-677页

作者： Albertos, P. García, P. Chen, Q. Luan, X. Department of Systems Engineering Control Instituto de Automática e Informática Industrial Universitat Politècnica deValència Spain Key Laboratory of Advance Process Control for Light Industries Institute of Automation Jiangnan University China

This paper deals with the control of simple process models with state-delays. A pre-compensator is used to cancel the delay. Due to the cancellation of some terms, the process as well as its undelayed part should be stable. Although the approach is general, in order to simplify the notation, second order systems are considered to describe the procedure. The proposed methodology is applied to compensate the delay in a recycled reactor as well as to control a pure state-delayed academic example. © 2018

关键词： process control Delay control systems Recycling control design Dead time compensator Dead time compensation Pre compensator Second order systemss Stable systems State delay Time delay systems

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Optimal Current Excitation for the Time-Domain Estimation of the Electrochemical Impedance

Optimal Current Excitation for the Time-Domain Estimation of...

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IEEE Conference on Vehicle Power and Propulsion (VPPC)

作者： Daniel Ritzberger Christoph Hametner Stefan Jakubek Institute of Mechanics and Mechatronics Control and Process Automation TU Wien Vienna Austria Christian Doppler Laboratory for Innovative Control and Monitoring of Automotive Powertrain Systems TU Wien Vienna Austria

For the real-time fault detection of electrochemical cells in automotive applications, time-domain based impedance estimation schemes, together with broad-band current excitation signals, have been developed. Whereas the appropriate choice of the estimator is necessary as to prevent a systematic estimation bias, the choice of the applied excitation signal is of equal crucial importance as thereby the covariance of the estimate, and therefore the resulting accuracy of the estimation scheme, is directly influenced. In this work, an optimization of the applied current excitation signal, based on the Fisher information matrix, is proposed and its influence on the estimation accuracy is investigated.

关键词： Estimation Optimization Impedance Time-domain analysis Noise measurement Integrated circuit modeling Equivalent circuits

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Retraction Note: Evaluation on diabetic plantar pressure data-set employing auto-segmentation technologies

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Neural Computing and Applications 2024年第24期36卷 15219-15219页

作者： Chen, Hongwei Cao, Luying Li, Zairan Hemanth, D. Jude Wu, Lijun de Albuquerque, Victor Hugo C. Shi, Fuqian Department of Orthopedics Yiwu Central Hospital Wenzhou Medical University Wenzhou People’s Republic of China Institute of Digitized Medicine Wenzhou Medical University Wenzhou People’s Republic of China Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Tianjin People’s Republic of China Department of ECE Karunya University Coimbatore India Programa de Pós-Graduação Em Informática Aplicada Universidade de Fortaleza Fortaleza Brazil

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Development of a smart identification and sorting system

Development of a smart identification and sorting system

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2018 World Congress on Engineering and Computer Science, WCECS 2018

作者： Kumar, Shubham Ashi Khanna, Pradeep Department of Instrumentation and Control Netaji Subhas Institute of Technology New Delhi India Department of Manufacturing Process and Automation Engineering South Africa

ISBN: (纸本)9789881404909

Sorting of the components on the basis of their features is an important process extensively required in industries mainly on assembly and production lines. Such systems are of significant importance in selective assembly processes where the part to be delivered is decided on the basis of real time requirements. This not only does away with the requirement of manual labor, but also addresses the issue of mistakes arising from fatigue and negligence of human worker, plus there is definitely an increase in productivity by the use of such systems as they offer the advantage of complete automation of the process. The present system has been developed with a view to provide an effective, simple and low cost solution to identification and sorting system applications. The system has been developed by using less costly and robust sensors and actuators such that the electronic circuitry involved is also simple and can meet the demands where flexibility of a concern because the present system can quickly be reprogrammed to meet any changed circumstance within the operating range of the system. System presently developed is based on sorting on the basis of component color. The system does not need to hit its home position each time it makes a delivery, rather it takes its present position as the reference and can make a quick move to the next delivery, saving a significant time. The system has successfully been tested and is found to give an error less than 1% in total number of trials conducted. © 2018 Newswood Limited. All rights reserved.

关键词： Real time systems

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A Primal-Dual SGD Algorithm for Distributed Nonconvex Optimization

arXiv

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arXiv 2020年

作者： Yi, Xinlei Zhang, Shengjun Yang, Tao Chai, Tianyou Johansson, Karl H. The Division of Decision and Control Systems School of Electrical Engineering and Computer Science KTH Royal Institute of Technology Stockholm100 44 Sweden The Department of Electrical Engineering University of North Texas DentonTX76203 United States The State Key Laboratory of Synthetical Automation for Process Industries Northeastern University Shenyang110819 China

The distributed nonconvex optimization problem of minimizing a global cost function formed by a sum of n local cost functions by using local information exchange is considered. This problem is an important component of many machine learning techniques with data parallelism, such as deep learning and federated learning. We propose a distributed primal–dual stochastic gradient descent (SGD) algorithm, suitable for arbitrarily connected communication networks and any smooth (possibly nonconvex) cost functions. We show that the proposed algorithm achieves the linear speedup convergence rate O(1/√nT) for general nonconvex cost functions and the linear speedup convergence rate O(1/(nT)) when the global cost function satisfies the Polyak–Lojasiewicz (P–L) condition, where T is the total number of iterations. We also show that the output of the proposed algorithm with constant parameters linearly converges to a neighborhood of a global optimum. We demonstrate through numerical experiments the efficiency of our algorithm in comparison with the baseline centralized SGD and recently proposed distributed SGD algorithms. Copyright © 2020, The Authors. All rights reserved.

关键词： Cost functions

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Delays in Model Reduction of Chemical Reaction Networks

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IFAC-PapersOnLine 2018年第14期51卷 100-105页

作者： Lipták, György Hangos, Katalin M. Process Control Research Group Systems and Control Laboratory Computer and Automation Research Institute Hungarian Academy of Sciences P.O. Box 63 BudapestH-1518 Hungary Department of Electrical Engineering and Information Systems University of Pannonia Veszprém Hungary

A novel engineering model reduction method is proposed in this paper that can be applied to a chemical reaction network (CRN) with chains of linear reactions. The reduced model is a delayed CRN with possibly different delays but with less state variables than the original model. As the first step of the model reduction, a decomposition method is also developed to transform chains with joint reactions into independent chains of linear reactions. The well known example of McKeithan's network is used as a case study to illustrate the basic concepts and the design method. © 2018

关键词： Reduction

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Distributed delay model of the McKeithan’s network

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IFAC-PapersOnLine 2019年第7期52卷 33-38页

作者： György Lipták Katalin M. Hangos Process Control Research Group Systems and Control Laboratory Computer and Automation Research Institute Hungarian Academy of Sciences P.O. Box 63 H-1518 Budapest Hungary Department of Electrical Engineering and Information Systems University of Pannonia Veszprém Hungary

In this paper CRNs containing linear reaction chains with multiple joint complexes were considered in order to obtain an equivalent reduced order delayed CRN model with distributed time delays. For this purpose, our earlier method (Lipták and Hangos (2018)) for decomposing the chains of linear reactions with multiple joint complexes was used together with the "linear chain trick". An analytical expression for the kernel function of the distributed delay was also derived from the reaction rate coefficients of the linear reaction chains. Our approach was demonstrated using the example of the well known McKeithan’s network model of kinetic proofreading.

关键词： process control Delay Chemical Reaction Networks

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Automatic diffusion mixing system for watering in regions with high water sales

Automatic diffusion mixing system for watering in regions wi...

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International Conference on Information Science and Communications Technologies (ICISCT)

作者： Rano Gazieva Sharafidin Aynakulov Ezoz Ozodov Azizjon Nigmatov Department of Automation and control of thechnology process in production Tashkent Institute of Irrigation and Agricultural Mechanization Engineers Tashkent Uzbekistan Department of Information Technologies Tashkent Institute of Irrigation and Agricultural Mechanization Engineers Tashkent Uzbekistan

ISBN: (数字)9781728125640

ISBN: (纸本)9781728125657

The article devoted to combined construction of two filtration systems of salt water in one pump unit. The article considers not only constructive solutions, but also issues of automatic control of the technological *** article has results of experimental stand, dates, particular qualities of sensor and distance control of SIM900D.

关键词： Irrigation Reverse osmosis Economics Valves process control automation

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