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第42届中国控制会议

作者： Zhong Liu Xuyang Lou Jinlin Zhu Key Laboratory of Advanced Process Control for Light Industry (Ministry of Education) Jiangnan University School of Food Science and Technology Jiangnan University

Batch process monitoring is crucial in production loss prevention and process safety promotion. However, the two-dimensional nonlinear dynamics in the batch process make the monitoring cumbersome. This paper proposes a novel dynamic deep model called two-dimensional LSTM variational auto-encoder(2DLSTM-VAE). Structurally, our model constructs with LSTM encoded under the conditional variational Bayes framework, which can cope with the nonlinear dynamics from two dimensions. Afterwards, a systematic fault detection framework is defined under the latent and residual domains to account for each running batch along with those run-to-run variations so as to reflect the process variability in the two-way monitoring aspects. Finally, a deep reconstruction-based contribution(DRBC) diagram is further developed to investigate root causes. For the case study, the validity of the 2DLSTM-VAE model is demonstrated in the penicillin fermentation process, and the results show that compared with other methods, the proposed deep model has better performance on fault detection and diagnosis.

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Multimodal process Monitoring Based on Dynamic Extended K-means-VAE-RF

Multimodal Process Monitoring Based on Dynamic Extended K-me...

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第35届中国控制与决策会议

作者： Shiwei Su Kaixiang Peng Xueyi Zhang Key Laboratory for Advanced Control of Iron and Steel Process of Ministry of Education School of Automation and Electrical Engineering University of Science and Technology Beijing

With the development of customization and flexibility of manufacturing industry,intelligent manufacturing process gradually presents multimodal characteristics,which are reflected in the strong coupling,nonlinear,multi working conditions and other characteristics of the *** this paper,a multi-modal process monitoring method based on dynamic expansion is *** view of the dynamic characteristics of process data,the process data is dynamically expanded through the amplification matrix,and then the multi-modal process data is modal divided through the improved K-means *** divided multi-modal process data is monitored using Variational Autoencoder,and relevant statistics and control limits are ***,the multi-modal process monitoring is constructed by introducing the method of random forest for modal *** validity of the algorithm is verified by real data of steel rolling process.

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Performances,mechanisms,and strategies for methane removal via gas biofiltration

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Frontiers of Environmental Science & Engineering 2025年第5期19卷 141-162页

作者： Xin Wu Chunping Yang Yan Lin Xiang Li Shaohua Wu Piotr Rybarczyk Jacek Gebicki Academy of Environmental and Resource Sciences School of Environmental Science and EngineeringGuangdong University of Petrochemical TechnologyMaoming 525000China College of Urban and Environment Sciences Hunan Provincial Key Laboratory of Comprehensive Utilization of Agricultural and Animal Husbandry Waste ResourcesHunan University of TechnologyZhuzhou 412007China College of Environmental Science and Engineering Hunan University and Key Laboratory of Environmental Biology and Pollution Control(Hunan University)of Ministry of EducationChangsha 410082China School of Environmental Science and Engineering Hainan UniversityHaikou 570228China College of Chemistry and Chemical Engineering Hunan Normal UniversityChangsha 410081China Department of Process Engineering and Chemical Technology Faculty of ChemistryGdansk University of TechnologyGdansk 80-233Poland

control of methane emissions has attracted widespread attention in the context of worldwide efforts to alleviate the greenhouse ***,a green and cost-effective treatment process,has been widely used for the purification of ***,there is still a lack of comprehensive information on methane ***,the state-of-the-art development trends of methane removal via biofiltration were comprehensively reviewed and commented *** of all,this article reviewed the mechanisms of methane removal and the possible degradation pathways in ***,the removal characteristics of single methane,methane mixed with volatile organic compounds or gaseous inorganic compounds by biofiltration,were summarized and ***,the practical applications of methane biofiltration were summed up and some inspirations were ***,the effective measures to improve the performance of methane biofiltration were put forward,and corresponding insights and future research directions for methane biofiltration were *** article can provide references for the practical applications of methane biofiltration and the mitigation of greenhouse effects.

关键词： Biofilter Methane VOC Greenhouse effect Carbon reduction

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Prescribed Performance control for Switched Nonlinear Systems

Prescribed Performance Control for Switched Nonlinear System...

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Chinese control Conference (CCC)

作者： Jie Lian Kang Chen Feiyue Wu Dong Wang The Key Laboratory of Intelligent Control and Optimization for Industrial Equipment Ministry of Education Dalian University of Technology Dalian China

This paper presents a prescribed performance control scheme for a class of switched nonlinear systems. First, the prescribed performance control (PPC) is used to guarantee the transient and steady-state performance of the tracking error. Then, the bounds of all signals in the resulting closed-loop system are ensured by the adaptive control and the dwell time method. At the same time, the ‘complexity explosion’ is avoided by using command filters. At the end, the effectiveness of the proposed control scheme is demonstrated by a simulation.

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$H_{\infty}$ Antidisturbance Event-Triggered control for Aeroengine Systems via Switched Affine Models

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IEEE Transactions on Aerospace and Electronic Systems 2024年第2期61卷 1600-1609页

作者： Ying Zhao Xinyu Ni Sixin Wen Ben Niu College of Marine Electrical Engineering Dalian Maritime University Dalian China Key Laboratory of Intelligent Control and Optimization for Industrial Equipment of Ministry of Education School of Control Science and Engineering Dalian University of Technology Dalian China

This study is focused on the issue of $H_{\infty }$ antidisturbance event-triggered (ADET) control for aeroengine control systems (AECS) under multiple disturbances. First, a switched affine model is employed to describe the AECS, taking into account the degradation of aeroengine performance and the phenomenon of multimode operation. Second, a disturbance observer is established to compensate for disturbances that arise from the modeling error, uncertainties, and other factors. Then, based on the disturbance observer, a dynamic event-triggered mechanism with respect to the affine term and an $H_{\infty }$ ADET controller are built to optimize network transmission resources and fuel flow efficiency. Furthermore, a sufficient condition is developed to enable the solvability of the $H_{\infty }$ ADET control issue for AECSs. Finally, a simulation platform of hardware-in-the-loop for the AECS based on switched affine model is implemented to illustrate the effectiveness of the present $H_{\infty }$ ADET control methodology.

关键词： Switches control systems Engines Aircraft propulsion Degradation Switched systems Fuels

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Time-triggered control of double channel transmission networked switched systems under DoS attacks

Time-triggered control of double channel transmission networ...

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第42届中国控制会议

作者： Jie Lian Hao Li Feiyue Wu Dong Wang The Key Laboratory of Intelligent Control and Optimization for Industrial Equipment of Ministry of Education the School of Control Science and Engineering Dalian University of Technology

This paper investigates the time-triggered control for double channel transmission networked switched systems(NSSs)under denial-of-service(DoS) attacks. For NSSs, the information of the sensor and controller needs to be transmitted through the network, which increases the risk of packet loss due to network attacks. The resulting packet loss will greatly degrade the system performance. To address this problem, this paper proposes a double channel transmission scheme and a novel control ***, based on the traditional time-triggered control framework, the transmission link is extended to two channels. At each triggered instant, the sensor selects one of the channels to transmit and the attacker can only select one of the channels to *** this way, the packet loss rate caused by DoS attacks can be effectively reduced. Secondly, the control strategy is designed to combine hold-input and zero-input according to the actual packet loss situation. Under this control strategy, sufficient conditions for the asymptotically mean-square stability of the NSSs are obtained by dwell time switching, and the solution of controller gain is solved. Finally, the feasibility of this study is verified by aeroengine model.

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A Graphical Model Approach for Switched System with Switch Digraphs

A Graphical Model Approach for Switched System with Switch D...

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Chinese control Conference (CCC)

作者： Feiyue Wu Dong Wang Jie Lian The Key Laboratory of Intelligent Control and Optimization for Industrial Equipment Ministry of Education Dalian University of Technology Dalian China

This paper presents a graphical model approach for the stability check of switched systems with switch digraphs. To specify the restricted switching, we introduce the concepts of path-dependent average dwell time (PDADT) and path-dependent average switching frequency (PDASF), which identify three classes of graphical models. First, a complete switch digraph depicting the restricted switching is presented based on the PDADT. Together with the PDASF, a fundamental switch digraph is then developed originally, which is a subgraph of the complete switch digraph and rules out the essential switching paths. Finally, a clustering-based switch digraph can be further constructed by considering the periodic property of the fundamental switch digraph. Then, we derive stability criteria for a switched system under a set of time-dependent switching signals that obey the given switch digraph. By contrast to the existing results encapsulating all the possible inequality conditions, we provide a particular set of inequality conditions to guarantee the stability of the constrained switched system. A numerical example is given to illustrate the analysis.

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Few-Reference Image Quality Assessment with Multiple Information Measurement Fusion 9th

Few-Reference Image Quality Assessment with Multiple Inform...

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9th International Forum on Digital Multimedia Communication, IFTC 2022

作者： Shi, Shuang Wang, Simeng Liu, Yuchen Zhou, Chengxu Gu, Ke Faculty of Information Technology Beijing University of Technology Beijing China Engineering Research Center of Intelligent Perception and Autonomous Control Ministry of Education Beijing China Beijing Laboratory of Smart Environmental Protection Beijing China Beijing Key Laboratory of Computational Intelligence and Intelligent System Beijing China Beijing Artificial Intelligence Institute Beijing China School of Electronic and Information Engineering Liaoning University of Technology Liaoning Jinzhou China Key Laboratory of Intelligent Control and Optimization for Industrial Equipment of Ministry of Education Dalian University of Technology Dalian China

ISBN: (纸本)9789819908554

In the era of media information explosion, there is an urgent need for a fast and reliable image quality assessment (IQA) model to improve the actual application effect of images. To this end, we propose the multiple information measurement fusion metric (MMFM), which innovatively combines two types of information measures (IMs), i.e., local IM and global IM, using only a small number of references for IQA. First, inspired by the free energy theory, we combine 2-dimensional autoregressive model with sparse random sampling method as an inference engine on an input image to generate its associated predicted image. Second, by the inspiration of pixel-wise measurement, we obtain the local IM by calculating the information entropy of the residual error between the input image and its corresponding predicted one. Third, motivated by the histogram-based measurement, we acquire the global IM by computing the two kinds of divergences between the input image and its predicted one. Fourth, we systematically fuse three components, independently including one distance of local IM between the reference and corrupted images and two distances of global IMs between the reference and corrupted images, based on a linear function to derive the final IQA result. The results of experiment on the most popular LIVE database show that our designed algorithm with only one number used as few reference has achieved well performance as compared with several mainstream IQA models. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Image enhancement

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Integral Sliding Mode Robust control of Manipulator Based on Disturbance Observer and HJI Theory 3

Integral Sliding Mode Robust Control of Manipulator Based on...

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3rd International Conference on Industrial Artificial Intelligence, IAI 2021

作者： Yang, Junman Wu, Di Sun, Ximing Dalian University of Technology Key Laboratory of Intelligent Control and Optimization Industrial Equipment of Ministry of Education China

ISBN: (纸本)9781665435178

This paper proposes a novel integral sliding mode robust control method for tracking control of robot manipulators based on Hamilton-Jacobi Inequality theory and a nonlinear disturbance observer. Firstly, the dynamic model of the manipulator considering the uncertainty and external disturbance is established through the Lagrange method. Secondly, a nonlinear disturbance observer is designed to estimate and compensate the composite interference. Hamilton-Jacobi Inequality theory and the designed disturbance observer are then applied to design the integral sliding mode robust control law with a new integral sliding mode surface. Finally, the proposed controller is employed for tracking control of a two-degree-of-freedom manipulator and compared with the conventional sliding mode controller. The comparison results demonstrate that the proposed approach can provide superior performance such as high tracking accuracy, fast transient response, and low chattering. © 2021 IEEE.

关键词： Sliding mode control

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Constructing a Raman and surface-enhanced Raman scattering spectral reference library for fine-particle analysis

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Journal of Environmental Sciences 2022年第8期34卷 1-13页

作者： Hui Chen Fengkui Duan Kebin He Jingjing Du Zhenli Sun Suhua Wang Key Laboratory of Resources and Environmental System Optimization of Ministry of Education College of Environmental Science and EngineeringNorth China Electric Power UniversityBeijing 102206China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Guangdong Provincial Key Laboratory of Petrochemcial Pollution Processes and Control School of Environmental Science and EngineeringGuangdong University of Petrochemical TechnologyMaoming 525000 China

Fine particles associated with haze pollution threaten the health of over 400 million people in China. Owing to excellent non-destructive fingerprint recognition characteristics, Raman and surface-enhanced Raman scattering(SERS) are often used to analyze the composition of fine particles to determine their physical and chemical properties as well as reaction mechanisms. However, there is no comprehensive Raman spectral library of fine particles. Furthermore, various studies that used SERS for fine-particle composition analysis showed that the uniqueness of the SERS substrates and different excitation wavelengths can produce a different spectrum for the same fine-particle component. To overcome this limitation, we conducted SERS experiments with a portable Raman spectrometer using two common SERS substrates(silver(Ag) foil and gold nanoparticles(Au NPs)) and a 785 nm laser. Herein, we introduced three main particle component types(sulfate-nitrate-ammonium(SNA), organic material, and soot) with a total of 39 chemical substances. We scanned the solid Raman, liquid Raman, and SERS spectra of these substances and constructed a fine-particle reference library containing 105 spectra. Spectral results indicated that for soot and SNA, the differences in characteristic peaks mainly originated from the solid-liquid phase transition;Ag foil had little effect on this difference, while the Au NPs caused a significant red shift in the peak positions of polycyclic aromatic hydrocarbons. Moreover, with various characteristic peak positions in the three types of spectra, we could quickly and correctly distinguish substances. We hope that this spectral library will aid in the future identification of fine particles.

关键词： Raman Surface-enhanced Raman scattering(SERS) Spectral library Fine-particle

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