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arXiv 2024年

作者： Yue, Peng Jin, Yaochu Dai, Xuewu Feng, Zhenhua Cui, Dongliang The State Key Laboratory of Synthetical Automation for Process Industries Northeastern University Shenyang110819 China The Department of Computer Science University of Surrey GuildfordGU2 7XH United Kingdom Northumbria University Newcastle upon TyneNE1 8ST United Kingdom Northeastern University Shenyang110819 China The School of Computer Science and Electronic Engineering University of Surrey GuildfordGU2 7XH United Kingdom

Train timetable rescheduling (TTR) aims to promptly restore the original operation of trains after unexpected disturbances or disruptions. Currently, this work is still done manually by train dispatchers, which is challenging to maintain performance under various problem instances. To mitigate this issue, this study proposes a reinforcement learning-based approach to TTR, which makes the following contributions compared to existing work. First, we design a simple directed graph to represent the TTR problem, enabling the automatic extraction of informative states through graph neural networks. Second, we reformulate the construction process of TTR’s solution, not only decoupling the decision model from the problem size but also ensuring the generated scheme’s feasibility. Third, we design a learning curriculum for our model to handle the scenarios with different levels of delay. Finally, a simple local search method is proposed to assist the learned decision model, which can significantly improve solution quality with little additional computation cost, further enhancing the practical value of our method. Extensive experimental results demonstrate the effectiveness of our method. The learned decision model can achieve better performance for various problems with varying degrees of train delay and different scales when compared to handcrafted rules and state-of-the-art solvers. Copyright © 2024, The Authors. All rights reserved.

关键词： Reinforcement learning

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Corrigendum to 'Integrated hybrid optical fiber Mach-Zehnder interferometers for simultaneous measurement of seawater temperature and salinity' [Sens. Actuat. A Phys., Volume 380, (16 December 2024), 116065]

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Sensors and Actuators A: Physical 2025年 381卷

作者： Jincheng Zhao Ruijie Liu Mingyue Wang Jian Zhao Ya-nan Zhang Yong Zhao College of Information Science and Engineering Northeastern University Shenyang 110819 China State Key Laboratory of Synthetical Automation for Process Industries Shenyang 110819 China Hebei Key Laboratory of Micro-Nano Precision Optical Sensing and Measurement Technology Qinhuangdao 066004 China

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Enhancing Force Sensing Capabilities in Exoskeleton Interfaces Using Compliant Actuator-Sensor Units - A User Study

Enhancing Force Sensing Capabilities in Exoskeleton Interfac...

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IEEE/RAS-EMBS International Conference on Biomedical Robotics and Biomechatronics (BioRob)

作者： Hosam Alagi Nikola Fischer Kai Behrends Iris Ftirst-Walter Jürgen Becker Michael Beigl Franziska Mathis-Ullrich Björn Hein Intelligent Process Automation and Robotics Laboratory (IPR) Institute for Anthropomatics and Robotics (IAR) Karlsruhe Institute of Technology (KIT) Karlsruhe Germany Institute of Telematics (TM) - Pervasive Computing Systems (TECO) at Karlsruhe Institute of Technology (KIT) Karlsruhe Germany Institut fuer Technik der Informationsverarbeitung (ITIV) at Karlsruhe Institute of Technology (KIT) Karlsruhe Germany Department Artificial Intelligence in Biomedical Engineering (AIBE) Friedrich-Alexander University Erlangen-Nürnberg (FAU) Erlangen Germany Karlsruhe University of Applied Sciences Karlsruhe Germany

ISBN: (数字)9798350386523

ISBN: (纸本)9798350386530

Reliable interaction force sensing between an exoskeleton and the human body is crucial for personalized support and efficient control. Poor donning and disturbances during movement lead to lower force measurement quality and thus to unfavorable use. In this work, we present an active smart human-robot interface by utilizing compliant actuator-sensor units (CASUs) that can be worn over clothing. These units combine capacitive force sensing and actuation using Shape-Memory Alloy (SMA) to actively compensate disturbances and improve force measurement by tightening the interface and reestablishing optimal contact. We present a pilot user study with five subjects, investigating the performance of an exoskele-ton interface featuring three integrated CASUs to compensate for non-ideal donning configurations and displacements during daily activities of walking, sitting down, and climbing the stairs. The results for a passive interface show a decrease in holding forces and force signal quality during activities. Our active interface, on the other hand, effectively compensates for disturbances, restoring high signal quality by the mean of peak-to-peak value up to 300% which leads to more distinct signals.

关键词： Legged locomotion Force measurement Cooling Force Exoskeletons Metals Stairs Robot sensing systems Sensors Reliability

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Corrosion Resistance Enhancement of Electrodeposition Ni-P Coating by Incorporation of Ti3c2tx/Mos2 Particles with Sandwich-Like Hierarchical Structure

SSRN

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SSRN 2022年

作者： Du, Yingchao Zhang, Xiaomeng Han, Peiwei School of Electrical and Inforrnation Automation Qufu Normal University Shandong Province Rizhao276826 China State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences PO Box 353 Beijing100190 China Innovation Academy for Green Manufacture Chinese Academy of Science Beijing100190 China

In this work, Ti3C2Tx/MoS2 particles with sandwich-like hierarchical structure are incorporated into the Ni-P coating by the simple electrodeposition. The addition of Ti3C2Tx/MoS2 particles can make the coating surface with much nodositas and layered "cauliflower" structure possessing the wettability of hydrophobicity. Then, the corrosion resistance increases much by the incorporation of Ti3C2Tx/MoS2 particles and the resistance of Ni-P-Ti3C2Tx/MoS2 composite coating first decreases and then increases with the prolonging immersion time. The corrosion mechanism of the Ni-P-Ti3C2Tx/MoS2 composite coating is analyzed and the role of Ti3C2Tx/MoS2 particles in Ni-P coating is discussed. © 2022, The Authors. All rights reserved.

关键词： Corrosion resistance

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Nonlinear unmanned aerial vehicle formation control via composite Laplacian quadratics

Advanced Control for Applications: Engineering and Industria...

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Advanced Control for Applications: engineering and Industrial Systems 2020年第2期2卷

作者： Jing, Peng Chen, Fei State Key Laboratory of Synthetical Automation for Process Industries Northeastern University China School of Control Engineering Northeastern University at Qinhuangdao China

This article studies a leader-following formation control problem, in which the agent model is governed by continuous-time nonlinear differential equations. We are interested in designing a distributed control algorithm which is capable of handling the strong nonlinearities induced by the unmanned aerial vehicle model. Our primary objective is to investigate the convergence of the corresponding closed-loop system, and to understand how the nonlinear dynamics and the network topologies may impose intrinsic barriers on formation control. The results show that an exponential convergence is guaranteed under the proposed algorithm via the composite Laplacian quadratics function as long as the network topology has a directed spanning tree. © 2020 John Wiley & Sons, Ltd.

关键词： Network topology

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$H_\infty$ Reliable Bumpless Transfer Control for Switched Systems With State and Rate Constraints

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IEEE Transactions on Systems, Man, and Cybernetics: Systems 2020年第10期50卷 3925-3935页

作者： Ying Zhao Jun Zhao College of Information Science and Engineering Northeastern University Shenyang China State Key Laboratory of Synthetical Automation for Process Industries Northeastern University Shenyang China

This paper concentrates on the issue of H ∞ reliable bumpless transfer control for a category of switched systems (SSs) with state and rate constraints. The H ∞ reliable bumpless transfer control problem refers to designing a collection of reliable controllers and a switching rule to ensure the SSs to satisfy the bumpless transfer performance and H ∞ reliable property. First, a concept of the bumpless transfer performance for a system in this category with possible actuator faults is introduced. Then, by a multiple Lyapunov functions approach, a switching rule and a set of reliable controllers are co-designed to assess the disturbance tolerance capability with bumpless transfer performance and to solve the H ∞ reliable bumpless transfer control problem of the system. Second, a criterion guaranteeing the bumpless transfer performance and H ∞ reliable property of the system is established. The criterion allows each subsystem not to possess both the bumpless transfer performance and H ∞ reliable property. Further, an algorithm is proposed to estimate the attraction domain of the system without disturbances. Finally, the effectiveness of the presented control scheme is verified by an example of controlling a turbofan model.

关键词： Closed loop systems Reliability Switches Actuators Transient analysis Adaptive control

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Classification on Point-cloud of Shoe-last Curvature using Weight-updated Boosting based Ensemble Learning

Classification on Point-cloud of Shoe-last Curvature using W...

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IEEE Joint International Information Technology and Artificial Intelligence Conference (ITAIC)

作者： Zairan Li Dan Wang Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University PR China

ISBN: (数字)9781728152448

ISBN: (纸本)9781728152455

Optimizing the curvature shape of shoe last is an important research content and a promising direction in current shoe-last design. The emergence of plantar pressure imaging method provided a new technical mean for shoe-last design. The point-cloud dataset was acquired from the plantar pressure experiments which may be used for generating comfort shoe-last curvature, and the key zones on last curvature may be classified and has potential benefit to the designers to produce comfort shoe. In this paper ensemble learning technologies are applied for classifying those points through the proposed weights-updated algorithms. The proposed weights-updated algorithm with boosting operation performed high effectiveness by comparing to k-NN, random forest (RF) and Bayers (NB) in classification accuracy. The proposed boosting based ensemble learning method will be potential applied in interactive design of industry and be beneficial to produce comfort shoes.

关键词： Training Machine learning algorithms Footwear Boosting Classification algorithms Statistics Unsupervised learning

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Adapting a reinforcement learning method for the distributed blocking hybrid flow shop scheduling problem

Adapting a reinforcement learning method for the distributed...

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Artificial Intelligence Technology (ACAIT), Asian Conference on

作者： Haoxiang Qin Yuting Wang Yuyan Han Qingda Chen Junqing Li School of Computer Science Liaocheng University Liaocheng China State Key Laboratory of Synthetical Automation for Process Industries Northeastern University Shenyang China School of information science and Engineering Shandong Normal University Jinan China

ISBN: (纸本)9781665426312

With the continuous emission of energy in the past years, the environmental problems are becoming more and more serious. For example, in manufacturing, the energy efficient scheduling problem has become particularly prominent, and attracted much attention of the researchers. As a common scheduling problem in the real world, the research on distributed blocking hybrid flow shop (DBHFSP) is very few. In this paper, we will carry out a study of the problem. Because of its NP-hard character, therefore, we use the intelligent optimization algorithm to solve the problem. we firstly introduce the MILP model of the DBHFSP, then, the Q-learning method combined with the IG algorithm framework (IGQ) is proposed to solve this problem. In the experimental part, through the experiment results and comparison with other algorithms in the recent literatures, the proposed algorithm shows the excellent performance in the simulation experiment with the objective of minimizing the energy consumption.

关键词： Energy consumption Adaptation models Q-learning Job shop scheduling Uncertainty Heuristic algorithms Dynamic scheduling

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Passive mechanical realizations of bicubic impedances with no more than five elements for inerter-based control design

arXiv

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arXiv 2021年

作者： Wang, Kai Chen, Michael Z.Q. Key Laboratory of Advanced Process Control for Light Industry Ministry of Education School of Internet of Things Engineering Jiangnan University Wuxi214122 China School of Automation Nanjing University of Science and Technology Nanjing210094 China

This paper mainly investigates the passive realization problems of bicubic (third-order) impedances as damper-spring-inerter networks consisting of no more than five elements. First, the special case where a bicubic impedance contains a pole or a zero on the imaginary axis or at infinity is discussed. Then, assuming that there is no pole or zero on the imaginary axis or at infinity, the realizations of bicubic impedances as five-element networks are investigated. Necessary and sufficient conditions for the realizability as five-element series-parallel networks and as five-element non-series-parallel networks are derived, respectively, where 22 series-parallel configurations and 11 non-series-parallel configurations are presented to cover the conditions. Finally, two numerical examples together with positive-real controller designs for a quarter-car suspension system are presented for illustrations. The results of this paper can contribute to the synthesis of low-complexity passive mechanical (or electrical) networks, which are motivated by the synthesis and design of inerter-based vibration control systems. Copyright © 2021, The Authors. All rights reserved.

关键词： Poles

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Preface

Lecture Notes in Control and Information Sciences

引用

Lecture Notes in Control and Information Sciences 2023年 492卷 v-vi页

作者： Luan, Xiaoli He, Shuping Liu, Fei Key Laboratory of Advanced Process Control for Light Industry [Ministry of Education Institute of Automation Jiangnan University Jiangsu Wuxi China Key Laboratory of Intelligent Computing and Signal Processing [Ministry of Education School of Electrical Engineering and Automation Anhui University Anhui Hefei China

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