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Observer-based quantised control of networked systems with round-robin protocol and transmission delay

Journal of control and Decision 2025年第1期12卷 24-33页

作者： Ge Guo Xuefei Yan Jian Kang State Key Laboratory of Synthetical Automation for Process Industries Northeastern UniversityShenyangPeople's Republic of China School of Control Engineering Northeastern University at QinhuangdaoQinhuangdaoPeople's Republic of China College of Information Science and Engineering Northeastern UniversityShenyangPeople's Republic of China

This paper addresses the ultimate boundedness control problem for a class of networked nonlinear systems with the round-robin(RR)protocol and uniform *** communication between sensor nodes and the controller is implemented via a constrained communication *** quantised output of the system is transmitted to the remote controller through a communication channel subject to a transmission *** the purpose of alleviating possible data collision,the well-known RR communication protocol is deployed to schedule the data *** the other hand,the uniform quantisation effects of the network are characterised by a round function(*** nearest integer function).The purpose of the addressed problem is to design an observer-based controller for the networked nonlinear systems such that,in the presence of RR protocol and uniform quantisation effects,the closed-loop system is ultimately *** controller is designed based on mean square stability analysis and Lyapunov-like method.A set of sufficient conditions for the ultimate boundedness of the closed-loop system are established and,on the basis of which,the desired controller gains are obtained by solving a set of linear matrix *** effectiveness of the proposed method is verified by numerical examples.

关键词： Networked control systems(NCSs) round-robin(RR)protocol transmission delay uniform quantisation ultimate boundedness control

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process control Principles for Scalable Electrolysis Systems 28

Process Control Principles for Scalable Electrolysis Systems

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28th IEEE International Conference on Emerging Technologies and Factory Automation, ETFA 2023

作者： Lorenz, Julius Klose, Anselm Lange, Hannes Kock, Tobias Urbas, Leon TUD Dresden University of Technology Process Control Systems Dresden Germany TUD Dresden University of Technology Process to Order Lab Dresden Germany TUD Dresden University of Technology Process Systems Engineering Group Dresden Germany

ISBN: (纸本)9798350339918

The scale up of hydrogen production to large scale production systems demands a structured approach to control these systems. With suitable control principles, optimization for operation can be achieved whilst maintaining flexibility. In this paper, existing control strategies are analyzed and compared for large scale electrolysis systems. It is argued, how modularization can enable the optimal distribution of set-points and enables the systems for capacity extension. An initial implementation in MATLAB is presented, showing the feasibility of the proposed power distribution concept. © 2023 IEEE.

关键词： process control

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Flexible process control for Scalable Electrolysis Systems

Flexible Process Control for Scalable Electrolysis Systems

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2023 IEEE International Conference on Electrical, Computer and Energy Technologies, ICECET 2023

作者： Lorenz, Julius Klose, Anselm Lange, Hannes Kock, Tobias Urbas, Leon Process Control Systems Tud Dresden University of Technology Dresden Germany Process to Order Lab Tud Dresden University of Technology Dresden Germany Process Systems Engineering Group Tud Dresden University of Technology Dresden Germany

ISBN: (纸本)9798350327816

Large-scale water electrolysis systems are built from a multitude of stack units. These stack units have to be controlled during operation. The question arises how process control of the system can be designed in that way, that scalable, extendable but also optimal operation of the stack units becomes possible. To achieve this goal, existing process control strategies from literature are analyzed. The requirements resulting from the inherent numbering up of stack units are described and an approach for an adaptable optimized process control strategy considering the system properties is proposed. The proposed process control strategy is implemented in a modeled electrolysis system and evaluated regarding the stated criteria. The results could show, that the inherent modularization of electrolysis systems can be used in advantage for a scalable operation. © 2023 IEEE.

关键词： Modular Automation process control Water Electrolysis

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Design of Supervisory Model Predictive control for HVAC Systems and Two Zones with Consideration of Energy Efficiency and Thermal Comfort 23

Design of Supervisory Model Predictive Control for HVAC Syst...

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23rd International Conference on control, Automation and Systems, ICCAS 2023

作者： Srisurapanon, Panithan Banjerdpongchai, David Chulalongkorn University Center of Excellence in Intelligent Control Automation for Process Systems Faculty of Engineering Department of Electrical Engineering Pathumwan Bangkok10330 Thailand

ISBN: (纸本)9788993215274

This paper presents the design of supervisory model predictive control for HVAC systems and two zones. The supervisory control (SC) is designed to find the optimal reference temperature of each zone. The design criteria consist of the total operating cost (TOC) and the thermal comfort cost (TCC). Then, the model predictive control (MPC) is designed to track the optimal reference signals. When SC and MPC are designed for two zones simultaneously, they are referred to centralized SC and centralized MPC. On the other hand, when SC and MPC are designed for two zones separately, they referred to decentralized SC and decentralized MPC. We then compare the results between the decentralized control and the centralized control. The trade-off curve shows that the performance of centralized control is better than that of decentralized control. In particular, centralized MPC improves the performance in tracking reference signals. Furthermore, TOC of centralized control is lower than that of decentralized control. It can be concluded that the centralized control is appropriate for two zones in terms of the tracking of reference and the electrical charge. © 2023 ICROS.

关键词： Model predictive control

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Principal Polynomial Analysis Based Status Monitoring for Gas-Liquid Two-Phase Flow in Horizontal Pipe 42

Principal Polynomial Analysis Based Status Monitoring for Ga...

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42nd Chinese control Conference, CCC 2023

作者： Zhang, Liyuan Wu, Wentao Dong, Feng School of Electrical and Information Engineering Tianjin University Tianjin Key Laboratory of Process Measurement and Control Tianjin300072 China

ISBN: (纸本)9789887581543

As a kind of flow process with complex and variable flow structure, multiple process variables and nonlinear characteristics, the flow status of multiphase flow shows non-stationary characteristics, and it is difficult to achieve accurate online monitoring. For the nonlinear characteristics of the flow status of gas-liquid two-phase flow, a monitoring method based on principal polynomial analysis is proposed to extract the nonlinear characteristics of the flow status information. This method performs dimensionality reduction in multiple steps and uses polynomials for feature fitting, which can fully extract flow status information. Multiple sensors are used to obtain data representing different fluctuation characteristics in the flow process, models of different flow statuses are established, and status monitoring is realized based on statistical indicators. In the comparison with the principal component analysis method, it can be found that the principal polynomial analysis method can extract the nonlinear features and can describe the flow status more comprehensively, which can improve the accuracy of status monitoring. © 2023 Technical Committee on control Theory, Chinese Association of Automation.

关键词： Polynomials

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Investigation of Elongated Bubble Centring in Slug Flow Based on Image processing 42

Investigation of Elongated Bubble Centring in Slug Flow Base...

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42nd Chinese control Conference, CCC 2023

作者： Xue, Ting Yuan, Yuqing College of Electrical and Information Engineering Tianjin University Tianjin Key Laboratory of Process Measurement and Control Tianjin300072 China

ISBN: (纸本)9789887581543

The intermittent slug flow in horizontal circular pipes occurs commonly in industrial applications such as pipeline transportation and nuclear reactor cooling. The phenomenon of elongated bubble centring in slug flow can affect the bubble interface morphology, resulting in fluctuations of characteristic parameters. Therefore, it is important to acknowledge the extent to which bubble centring occurs and the possible influencing factors. This paper aims to investigate the elongated bubble centring in moderately sized pipes based on the laser-induced fluorescence method. A new image processing procedure is developed to measure the centring degree. A novel segmentation method is proposed to improve measurement accuracy by combining the global threshold algorithm with the Grey Wolf Optimization. The statistical analysis shows a positive correlation between the Froude number and the degree of bubble centring. Furthermore, the effect of superficial flow rate ratios is explored in the cases of similar Froude numbers. Finally, the results are verified by the models and the experimental data previously published. © 2023 Technical Committee on control Theory, Chinese Association of Automation.

关键词： Image processing

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Experimental and Numerical Evaluation of Models for Metallic Honeycomb Sandwich Structures 7

Experimental and Numerical Evaluation of Models for Metallic...

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7th International Symposium on Multidisciplinary Studies and Innovative Technologies, ISMSIT 2023

作者： Hussien, Ali Mohammed Shekhan, Sewara Mohsin Mahealdeen Abreesm, Asmaa Mehasn College of Petroleum Process Engineering Tikrit University Petroleum & Gas Refinery Engineering Department Iraq Technical Institute of Kirkuk Northern Technical University Iraq College of Petroleum Process Es Engineering Tikrit University Petroleum Systems Control Engineering Department Iraq

ISBN: (纸本)9798350342154

Sandwich constructions with metallic honeycomb cores are used in numerous mechanical applications, especially in aerospace, where high explicit modulus or solidity to weight ratios are needed. Square honeycomb sandwich panels are easier to make than hexagonal ones. There is also evidence that square honeycomb sandwich panels have a greater structural integrity-to-weight ratio. Scholarly research on square honeycomb sandwich boards has focused on predicting the structure's response to shear, twisting, in-plane and out- of-plane strain, and dynamic shots. This study compares experimental models of square metallic honeycomb collapse under a three-point twist. Disillusioned curiosity can be shown through face-clasping, face-yielding, center- clasping, and center-yielding. Scientists compare their hypotheses to traditional views that suggest a clash between the minute and fact sheets, the shear and the centre. These tools measure face sheet shear stress and rotating minute centre pressure. The section that deviates from the central region becomes more important as it thickens. Limited component research evaluates explanatory models. The major goals of post-processing limited component models are to understand neighbourhood yielding and locking inside the structure and to examine how adjacent disappointment affects honeycomb power migration. Parametric analysis using multiple honeycomb structures was used to test disappointment ideas. We aim to create separate explanatory frameworks that can anticipate discontentment across stacking levels, geometries, and relative densities. Diagnostic models are combined with key improvement ideas to help architects choose materials and geometry under implementation constraints. © 2023 IEEE.

关键词： Honeycomb structures

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Multi-Block Integrated Monitoring of Gas-Liquid Two-Phase Flow Based on Conductance Signal Analysis 42

Multi-Block Integrated Monitoring of Gas-Liquid Two-Phase Fl...

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42nd Chinese control Conference, CCC 2023

作者： Li, Zhao Zhang, Shumei Tan, Chao Dong, Feng School of Electrical and Information Engineering Tianjin Key Laboratory of Process Measurement and Control Tianjin University Tianjin300072 China

ISBN: (纸本)9789887581543

The state monitoring of gas-liquid two-phase flow with complex and diverse structures is the key to ensure the safe and stable operation of related industrial production. In order to achieve effective monitoring with limited sensing equipment, a multi-block integrated monitoring strategy for gas-liquid two-phase flow based on conductance signal analysis in time, frequency and multiscale domain is proposed. Three-block information including water holdup in time-domain, continuous wavelet transforms (CWT) based coarse scale approximation (CSA) coefficients in frequency-domain and CWT based local wavelet energy (LWE) coefficient maps in multiscale-domain are used for block-based modeling and monitoring. Considering the original structure of each block, the traditional principal component analysis (PCA) is adopted to model and monitor 1-D information including water holdup and CSA coefficients, while the tensor PCA is adopted for the 2-D LWE coefficient map. Three-block monitoring results are integrated through Bayesian inference to realize final monitoring. The dynamic experiment results demonstrate that the proposed multi-block integrated monitoring outperforms single-block information monitoring. © 2023 Technical Committee on control Theory, Chinese Association of Automation.

关键词： Principal component analysis

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Eff-3DPSeg:3D Organ-Level Plant Shoot Segmentation Using Annotation-Efficient Deep Learning

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Plant Phenomics 2023年第3期5卷 626-641页

作者： Liyi Luo Xintong Jiang Yu Yang Eugene Roy Antony Samy Mark Lefsrud Valerio Hoyos-Villegas Shangpeng Sun Bioresource Engineering Department McGill UniversityMontrealQCCanada Key Laboratory of Advanced Process Control for Light Industry(Ministry of Education) Jiangnan UniversityWuxiJiangsuChina Plant Science Department McGill UniversityMontrealQCCanada

Reliable and automated 3-dimensional(3D)plant shoot segmentation is a core prerequisite for the extraction of plant phenotypic traits at the organ *** deep learning and point clouds can provide effective ways to address the ***,fully supervised deep learning methods require datasets to be point-wise annotated,which is extremely expensive and *** our work,we proposed a novel weakly supervised framework,Eff-3DPSeg,for 3D plant shoot ***,high-resolution point clouds of soybean were reconstructed using a low-cost photogrammetry system,and the Meshlab-based Plant Annotator was developed for plant point cloud ***,a weakly supervised deep learning method was proposed for plant organ *** method contained(a)pretraining a self-supervised network using Viewpoint Bottleneck loss to learn meaningful intrinsic structure representation from the raw point clouds and(b)fine-tuning the pretrained model with about only 0.5%points being annotated to implement plant organ ***,3 phenotypic traits(stem diameter,leaf width,and leaf length)were *** test the generality of the proposed method,the public dataset Pheno4D was included in this *** results showed that the weakly supervised network obtained similar segmentation performance compared with the fully supervised *** method achieved 95.1%,96.6%,95.8%,and 92.2%in the precision,recall,F1 score,and mIoU for stem–leaf segmentation for the soybean dataset and 53%,62.8%,and 70.3%in the AP,AP@25,and AP@50 for leaf instance segmentation for the Pheno4D *** study provides an effective way for characterizing 3D plant architecture,which will become useful for plant breeders to enhance selection *** trained networks are available at https://***/jieyi-one/EFF-3DPSEG.

关键词： Deep Plant weakly

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Gas-Water Two-Phase Flow Status Identification Based on Jointly Specific and Shared Dictionary Learning 42

Gas-Water Two-Phase Flow Status Identification Based on Join...

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42nd Chinese control Conference, CCC 2023

作者： Wu, Wentao Zhang, Shumei Tan, Chao Dong, Feng School of Electrical and Information Engineering Tianjin Key Laboratory of Process Measurement and Control Tianjin University Tianjin300072 China

ISBN: (纸本)9789887581543

Gas-water two-phase flow is a complex and changeable process, which widely exists in a variety of industrial scenarios. The gas-water two-phase flow has complex flow characteristics and fluid structure, which can be changed into different flow statuses. There are both differences and similarities among various flow statuses. In order to realize the accurate identification of gas-water two-phase flow, a jointly specific and shared dictionary learning (JSSDL) method is proposed. Based on multi-sensor data, the specific discrimination dictionary for different flow statuses and the shared dictionary for similar characteristics are established respectively to solve the problem of gas-water two-phase flow status identification. In the horizontal gas-water two-phase flow circuit, the effectiveness of the method is verified by experiments. © 2023 Technical Committee on control Theory, Chinese Association of Automation.

关键词： Two phase flow

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