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Cooperative Control Strategy Research Based on Hybrid Dual-terminal Event-triggered Mechanism

Zidonghua Xuebao/Acta Automatica Sinica 2025年第4期51卷 792-803页

作者： Li, Dong-Ni Sun, Jia-Yue Yan, Yu-Qing Zhang, Hua-Guang State Key Laboratory of Synthetical Automation for Process Industries Northeastern University Shenyang110819 China College of Information Science and Engineering Northeastern University Shenyang110819 China

For nonlinear multiagent systems, this paper proposes the fuzzy tracking control strategy based on hybrid dual-terminal event-triggered mechanism. First of all, compared with existing state triggering mechanisms, a flexible and adjustable threshold designing method is constructed, which meets the real-time performance requirements of the system. Moreover, the improved state triggering mechanism considers the estimated state signal as the trigger signal, which effectively reduces the conservatism of existing mechanisms and enhances the flexibility of threshold design. Subsequently, the hybrid dual-terminal event-triggered mechanism is designed for controller to actuator link and sensor to controller link, which releases dual channel communication pressure, simultaneously. Besides, to solve the problem of unknown unmeasurable state, the state observer is constructed, which bases solely on relative output information. Finally, all the signals are semiglobally uniformly ultimately bounded in the closed-loop system, and a practical simulation example demonstrates the feasibility of the proposed control strategy. © 2025 Science Press. All rights reserved.

关键词： Controllers

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Numerical stress and damage analysis of cement plug under casing corrosion in CO₂ geological sequestration

引用

process Safety and Environmental Protection 2025年 193卷 1036-1049页

作者： Peng, Haoyan Xu, Zhao-Dong Lu, Hongfang Xia, Zhiheng Wang, Xin Wang, Xingwei Liu, Tengfei Dai, Jun China-Pakistan Belt and Road Joint Laboratory on Smart Disaster Prevention of Major Infrastructures Southeast University Nanjing 210096 China School of Resources and Civil Engineering Northeastern University Shenyang 110819 China College of Information Science and Engineering Northeastern University Shenyang 110004 China Key Laboratory of Synthetical Automation for Process Industries Northeastern University Shenyang 110004 China

The safety and stability of the wellbore during geological sequestration of CO2 are of paramount importance. The accumulation of corrosive scale in the casing can result in local stress concentrations and increase the... 详细信息

The safety and stability of the wellbore during geological sequestration of CO₂ are of paramount importance. The accumulation of corrosive scale in the casing can result in local stress concentrations and increase the risk of damage to the cement plug. In this study, the stresses under the concentration-diffusion-controlled corrosion boundary are numerically solved using the boundary element method (BEM) based on the fundamental solution of the displacement boundary. The Mazars damage model was employed to analyze the damage sustained by the cement plugs, and the influence of the diffusion coefficient on this damage was examined across a broad spectrum of values. Ultimately, a predictive formula for the damage height of the cement plugs was proposed, along with a temporal prediction for the complete degradation of the wall. The results indicate that damage occurs more significantly in areas with high bicarbonate concentrations, while damage is often already present in regions with low concentrations. Furthermore, at higher diffusion coefficients, cement plugs sustain complete damage within a few years. In contrast, at lower diffusion coefficients, cement plugs can preserve long-term integrity for hundreds to thousands of years. The numerical stress solution presented in this paper effectively calculates the stress on the cement plug under the casing corrosion boundary. Additionally, the proposed formula for predicting damage height offers a foundation for safety practices and long-term reliability assessments in geological CO₂ sequestration projects. © 2024

关键词： CCS Cement Plug Corrosion Damage Analysis Numerical Stress Solution

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Optical fiber-based surface plasmon resonance sensor for simultaneous measurement of relative humidity and temperature

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Applied Optics 2025年第9期64卷 2261-2268页

作者： Zhang, Qi Chen, Xiaopeng Li, Xinghui Wang, Huifang Zhou, Xue Yan, Xin Cheng, Tonglei State Key Laboratory of Synthetical Automation for Process Industries College of Information Science and Engineering National Frontiers Science Center for Industrial Intelligence and Systems Optimization Northeastern University Shenyang110819 China Department of Mechanical Engineering Politecnico di Milano Milan20156 Italy Foshan Graduate School of Innovation Northeastern University Guangdong Foshan528311 China Hebei Key Laboratory of Micro-Nano Precision Optical Sensing and Measurement Technology Qinhuangdao066004 China

In this work, an optical fiber sensor based on surface plasmon resonance (SPR) is proposed for simultaneous measurement of relative humidity (RH) and temperature, which is constructed by connecting two segments of thin-core fibers (TCFs) using a multimode fiber (MMF). The gold film was coated on TCFs to excite the SPR effect. One was further coated with carboxymethyl cellulose (CMC) to sense RH (Channel I), and the other was coated with gold nanoparticles (AuNPs) and polydimethylsiloxane (PDMS) to sense temperature (Channel II). The detection was performed via the resonance wavelength shift induced by the refractive index (RI) change of CMC and PDMS in relation to RH variation and temperature variation, respectively. The incorporation of gold nanoparticles enhances the sensitivity of the SPR sensor and shifts the resonance wavelengths, allowing for more outstanding demarcation of the SPR dip between the two portions inside the equivalent spectrum. Experimental results show that the sensor has an RH sensitivity of −1.053 nm/%RH and a temperature sensitivity of −2.306 nm/◦C. Moreover, the cross-sensitivity issue present in RH and temperature measurements was resolved by introducing a dual-wavelength matrix method. The proposed sensor offers high sensitivity, a simple structure, and ease of manufacturing, making it broadly applicable in fields such as food safety, biotechnology, and manufacturing. © 2025 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.

关键词： Gold nanoparticles

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Study on the Safety Performance Parameters of Lithium-Ion Batteries Under Unconventional Extrusion Conditions

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Journal of Electrochemical Energy Conversion and Storage 2025年第4期22卷 041005页

作者： Zheng, Suzhen Du, Jianhua Ou, Yingjie Xiong, Leji Wang, Jiabin He, Xingfeng Wei, Senrong Wang, Canxiong Hao, Xin Tu, Ran College of Mechanical Engineering and Automation Key Laboratory of Process Monitoring and System Optimization for Mechanical and Electrical Equipment https://***/03frdh605Huaqiao University Xiamen 361021 Fujian China College of Mechanical Engineering and Automation Key Laboratory of Process Monitoring and System Optimization for Mechanical and Electrical Equipment Huaqiao University Xiamen 361021 Fujian China

The safety issues of lithium-ion batteries under mechanical abuse conditions have earned widespread attention due to their high uncertainty and risk. In this article, extrusion tests were conducted on 10 Ah pouch cells, with different indenter shapes, loading locations, and state of charge (SOC). The voltage changes, temperature changes during the loading process, and microscopic structural changes of the cell electrodes after extrusion tests were analyzed to investigate the impact of different test conditions on the safety performance parameters of the cells. The tests included various unconventional locations that cannot be achieved under standard experimental conditions for lithium-ion batteries, better simulating the random collisions that lithium-ion batteries may experience in real-world scenarios. The results show that a sharp indenter induces earlier internal short circuits in the cells compared to a blunt indenter, leading to more severe thermal runaway reactions. Higher SOC is associated with faster average temperature rise rates, increased risk of thermal runaway, and more pronounced voltage drops at the moment of internal short circuits. The research results provide theoretical insights into the failure mechanisms of cells under mechanical abuse and offer valuable guidance for improving cell safety design.

关键词： reliability mechanical abuse Circuits Deformation Lithium internal short circuit and damage tolerance Shapes Safety Temperature unconventional location Lithium-ion batteries Electrodes Damage durability lithium-ion battery Extruding safety performance parameter

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Trend-Aware Patch Feature Fusion Transformer for Fault Diagnosis of Vibration Signals

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IEEE Sensors Journal 2025年

作者： Zhang, Ruicong Chu, Fei Qiu, Yazhi He, Dakuo Wang, Fuli China University of Mining and Technology School of Information and Control Engineering Xuzhou221000 China State Key Laboratory of Intelligent Optimized Manufacturing in Mining & Metallurgy Process Beijing Key Laboratory of Process Automation in Mining & Metallurgy Beijing100160 China Northeastern University College of Information Science and Engineering State Key Laboratory of Synthetical Automation for Process Industries Shenyang110819 China Northeastern University College of Information Science and Engineering Shenyang110000 China

The Vision Transformer (ViT) has demonstrated reliable performance in industrial equipment fault diagnosis by capturing global features and long-range dependencies in vibration signals. Nonetheless, when processing vibration signals, ViT primarily focuses on the correlations between patches, while neglecting the trend variation information hidden between signal units. This limitation hinders the model’s ability to extract latent fault information. To address this issue, we propose a trend-aware patch feature fusion Transformer (TAPformer) for fault diagnosis of vibration signals. Specifically, we design both patch-level and signal-level trend-aware self-attention blocks and adopt a weighted approach to integrate coarse-grained patch-level trend features with fine-grained signal-level trend features at the output of each self-attention head. This approach enables the model to capture fault information hidden within trend variations, effectively enhancing its fault detection capabilities. TAPformer establishes optimal weighted fusion hyperparameters through ablation experiments and is tested on four public datasets. Compared to eight advanced models, TAPformer achieves the highest accuracy across all four datasets, demonstrating the effectiveness and generalization capability of the proposed method. © 2001-2012 IEEE.

关键词： Fault detection

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Preference Prediction-Based Evolutionary Multiobjective Optimization for Gasoline Blending Scheduling

IEEE Transactions on Artificial Intelligence

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IEEE Transactions on Artificial Intelligence 2025年第1期6卷 79-92页

作者： Fang, Wenxuan Du, Wei Yu, Guo He, Renchu Tang, Yang Jin, Yaochu East China University of Science and Technology Key Laboratory of Smart Manufacturing in Energy Chemical Process Ministry of Education Shanghai200237 China Nanjing Tech University Institute of Intelligent Manufacturing Nanjing211816 China China University of Petroleum Department of Automation College of Artificial Intelligence Beijing102249 China Westlake University School of Engineering Hangzhou310030 China

Gasoline blending scheduling is challenging, involving multiple conflicting objectives and a large decision space with many mixed integers. Due to these difficulties, one promising solution is to use preference-based multiobjective evolutionary algorithms (PBMOEAs). However, in practical applications, suitable preferences of decision makers are often difficult to generalize and summarize from their operational experience. This article proposes a novel framework called preference prediction-based evolutionary multiobjective optimization (PP-EMO). In PP-EMO, suitable preferences for a new environment can be automatically obtained from historical operational experience by a machine learning-based preference prediction model when we feed the model with the input of the optimization environment. We have found that the predicted preference is able to guide the optimization to efficiently obtain a set of promising scheduling scenarios. Finally, we conducted comparative tests across various environments, and the experimental results demonstrate that the proposed PP-EMO framework outperforms existing methods. Compared with no preference, PP-EMO reduces operating costs by about 25% and decreases blending errors by 50% under demanding operational conditions. © 2024 IEEE.

关键词： Job shop scheduling

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An End-to-End Framework for Optimizing Foot Trajectory and Force in Dry Adhesion Legged Wall-Climbing Robots

arXiv

引用

arXiv 2025年

作者： Xiao, Jichun Nie, Jiawei Hao, Lina Li, Zhi The School of Mechanical Engineering and Automation Northeastern University United States The State Key Laboratory of Synthetical Automation for Process Industries Northeastern University United States

Foot trajectory planning for dry adhesion legged climbing robots presents challenges, as the phases of foot detachment, swing, and adhesion significantly influence the adhesion and detachment forces essential for stable climbing. To tackle this, an end-to-end foot trajectory and force optimization framework (FTFOF) is proposed, which optimizes foot adhesion and detachment forces through trajectory adjustments. This framework accepts general foot trajectory constraints and user-defined parameters as input, ultimately producing an optimal single foot trajectory. It integrates three-segment C2 continuous Bezier curves, tailored to various foot structures, enabling the generation of effective climbing trajectories. A dilate-based GRU predictive model establishes the relationship between foot trajectories and the corresponding foot forces. Multi-objective optimization algorithms, combined with a redundancy hierarchical strategy, identify the most suitable foot trajectory for specific tasks, thereby ensuring optimal performance across detachment force, adhesion force and vibration amplitude. Experimental validation on the quadruped climbing robot MSTM3F showed that, compared to commonly used trajectories in existing legged climbing robots, the proposed framework achieved reductions in maximum detachment force by 28 %, vibration amplitude by 82 %, which ensures the stable climbing of dry adhesion legged climbing robots. © 2025, CC BY.

关键词： Multiobjective optimization

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Double Coil Compensation Method for Reducing Distortion of High-Speed MFL Signals

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IEEE Transactions on Instrumentation and Measurement 2025年 74卷

作者： Liu, Jinhai Xu, Hang Jiang, Lin Zhang, Huaguang Liu, Jiarui State Key Laboratory of Synthetical Automation for Process Industries Shenyang110819 China Northeastern University College of Information Science and Engineering Shenyang110819 China

The magnetic flux leakage (MFL) testing is widely used in the health evaluation of oil pipelines due to its nondestructive and efficient characteristics. However, motion-induced eddy currents (MIECs), which will cause distortion of the high-speed MFL signals, are generated in pipelines due to the relative motion with magnets. The distortion signals will reduce the accuracy of defect evaluation. In terms of the above issues, a double coil compensation method is proposed. First, the causes, distribution positions, and diffusion characteristics of MIECs are determined through the theoretical analysis to clarify the reasons for the distortion of high-speed MFL signals. Second, given the asymmetric distribution characteristics of MIECs, an asymmetric structure is proposed to capture MIECs at the defects and the magnetic poles, which cause distortion of high-speed MFL signals. Third, based on the double coil groups, an active–passive strategy is proposed to distinguish pipeline surface and back defects, which ensures the integrity of defect evaluation and enhances the reliability of pipeline repair. Finally, the compensation performance and distinguishing capacity of the proposed method are verified by simulated and experimental analysis. The results show that compensated signals approximate the static MFL signals and have satisfactory performances of defect size quantification. © 1963-2012 IEEE.

关键词： Signal distortion

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A dynamic utopia point updating strategy for multi-objective optimization

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ISA Transactions 2025年

作者： Niu, Yue-Yan Li, Xiao-Jian College of Information Science and Engineering Northeastern University Shenyang110819 China State Key Laboratory of Synthetical Automation for Process Industries Northeastern University Shenyang110819 China

Multi-objective optimization problems widely exist in engineering practice, which are usually solved by repeatedly searching Pareto fronts. However, the search process faces the challenges of heavy computational burden and local optimality. To overcome these difficulties, a novel utopia optimization method is developed in the paper, where the multi-objective problems are converted into single-objective ones without repeatedly searching, and then the computational burden is reduced. In particular, different from the classical utopia optimization, where the utopia point is always fixed during the whole optimization process, a dynamical updating strategy is proposed by comparing the current optimization solution and the original utopia point, and the local optimality problem is also solved. Moreover, an improved particle swarm optimization method with the Logistic map and adaptive weights is developed to further enhance the computing ability of the optimization solution. Finally, three examples are taken for simulations, and the results indicate that the relative errors between the global optimums and the optimal values are respectively reduced by 1.45, 1.06, and 0.14, compared with the existing approaches. © 2025 International Society of automation

关键词： Multiobjective optimization

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Interval Observer-Based Secure Estimation for T-S Fuzzy Systems Under Stealthy Attacks

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IEEE Transactions on Fuzzy Systems 2025年

作者： Li, Zhi-Hui Yang, Guang-Hong Northeastern University College of Information Science and Engineering Shenyang110819 China Northeastern University State Key Laboratory of Synthetical Automation for Process Industries Shenyang110819 China

This paper focuses on the interval state estimation for T-S fuzzy systems under stealthy sensor attacks, where the premise variables are unmeasurable. To deal with the stealthy attack, an upper and lower bounds estimation method for the attack is proposed, where the nominal and auxiliary matrices are introduced to overcome the difficulty of ensuring the error system nonnegativity induced by fuzzy rules. Then, based on the bounds, an attack-resistant interval observer is constructed to achieve secure state estimation, and the estimation accuracy is improved using the H∞ technique. Compared with the existing interval observer for T-S fuzzy systems, the designed interval observer has better resilience performance when the system is under stealthy attacks. Finally, simulation examples are provided to illustrate the effectiveness of the proposed results. © 1993-2012 IEEE.

关键词： Interval observer stealthy attacks t-s fuzzy systems unmeasurable premise variables

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