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The Investigation of Data Voting Algorithm for Train Air-Braking System Based on Multi-Classification SVM and ANFIS

Chinese Journal of Electronics 2024年第1期33卷 274-281页

作者： Juhan WANG Ying GAO Yuan CAO Tao TANG School of Electronics and Information Engineering Beijing Jiaotong University Graduate Department China Academy of Railway Science National Engineering Research Center of Rail Transportation Operation and Control System Beijing Jiaotong University

The pressure data of the train air braking system is of great significance to accurately evaluate its operation state. In order to overcome the influence of sensor fault on the pressure data of train air braking system, it is necessary to design a set of sensor fault-tolerant voting mechanism to ensure that in the case of a pressure sensor fault, the system can accurately identify and locate the position of the faulty sensor, and estimate the fault data according to other normal data. A fault-tolerant mechanism based on multi-classification support vector machine(SVM) and adaptive network-based fuzzy inference system(ANFIS) is introduced. Multi-classification SVM is used to identify and locate the system fault state, and ANFIS is used to estimate the real data of the fault sensor. After estimation, the system will compare the real data of the fault sensor with the ANFIS estimated data. If it is similar,the system will recognize that there is a false alarm and record it. Then the paper tests the whole mechanism based on the real data. The test shows that the system can identify the fault samples and reduce the occurrence of false alarms.

关键词： Multi-classification support vector machine Adaptive network-based fuzzy inference system Train air braking system Fault-tolerant voting Multi-sensors

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Incremental Reinforcement Learning via Performance Evaluation and Policy Perturbation

IEEE Transactions on Artificial Intelligence

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IEEE Transactions on Artificial Intelligence 2024年第5期5卷 2253-2263页

作者： Deng, Guizhou Fu, Huiqiao Wang, Xinpeng Liu, Canghai Tang, Kaiqiang Chen, Chunlin Southwest University of Science and Technology Mechanical Engineering School of Manufacturing Science and Engineering Mianyang621000 China Nanjing University School of Management and Engineering Nanjing210093 China Nanjing University Department of Control and Systems Engineering School of Management and Engineering Nanjing210093 China

Rapid adaptation to the environment is the long-term task of reinforcement learning. However, reinforcement learning faces great challenges in dynamic environments, especially with continuous state-action spaces. In this article, we propose a systematic incremental reinforcement learning method via performance evaluation and policy perturbation (IRL-PEPP) to improve the adaptability of reinforcement learning algorithms in dynamic environments with continuous state-action spaces, which mainly includes three parts, i.e., performance evaluation, policy perturbation, and importance weighting. First, in performance evaluation, we apply the learned optimal policy to sample a few episodes in the original environment and use these samples to evaluate the policy applicability in the new environment. Then, in policy perturbation, the policy is perturbed according to the policy applicability to balance the tradeoff between exploration and exploitation in the new environment. Finally, importance weighting is applied to weight the information to speed up the adjustment process of the policy. Experimental results demonstrate the feasibility and efficiency of the proposed IRL-PEPP method for continuous control tasks in comparison with the existing state-of-the-art methods. © 2023 IEEE.

关键词： Reinforcement learning

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In-situ Observation of Inclusion Formation Behaviors during Solidification Process Using Model Alloy

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Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan 2025年第3期111卷 85-94页

作者： Kawanishi, Sakiko Tsukahara, Yuki Terashima, Shingo Nakao, Haruto Sukenaga, Sohei Shibata, Hiroyuki Department of Energy Science and Technology Graduate School of Energy Science Kyoto University Japan Department of Metallurgy Graduate School of Engineering Tohoku University Japan Institute of Multidisciplinary Research for Advanced Materials Tohoku University Japan

The formation of secondary inclusions during the solidification process of molten steel is a complex phenomenon triggered by microsegregation. controlling the dispersion of secondary inclusions in the solidified steel is an important issue that greatly affects the properties of the steel;however, the distribution of inclusions after solidification does not always coincide with the locations of inclusion formation. Therefore, it is still difficult to estimate when, where, and at what supersaturation level inclusions crystallize in the liquid phase, and it is desirable to clarify their formation behavior to control the dispersion of inclusions. In this study, we investigated the formation process of inclusion using a ternary model material of succinonitrile-water-lumogen yellow by in-situ observation, where the formation of oversaturated lumogen yellow can be regarded as the inclusion formation. It was confirmed that the frequency of inclusion formation increased significantly when the solution was held at lower temperatures, i.e., when a large supersaturation ratio was given. The results of the formation frequency indicated that the formation of inclusions occurred in the liquid phase according to the classical nucleation theory. © 2025 The Iron and Steel Institute of Japan.

关键词： Dispersions

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Molecules with a TEMPO-based head group as high-performance organic friction modifiers

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Friction 2023年第2期11卷 316-332页

作者： Jinchi HOU Masaki TSUKAMOTO Seanghai HOR Xingyu CHEN Juntao YANG Hedong ZHANG Nobuaki KOGA Koji YASUDA Kenji FUKUZAWA Shintaro ITOH Naoki AZUMA Department of Complex Systems Science Graduate School of InformaticsNagoya UniversityNagoya 464-8601Japan Institute of Materials and Systems for Sustainability Nagoya UniversityNagoya 464-8601Japan Department of Micro-Nano Systems Engineering Graduate School of EngineeringNagoya UniversityNagoya 464-8603Japan

High-performance organic friction modifiers(OFMs)added to lubricating oils are crucial for reducing energy loss and carbon *** establish a new class of OFMs,we measured the friction and wear properties of N-(2,2,6,6-tetramethyl-1-oxyl-4-piperidinyl)dodecaneamide referred to as *** effect of its head group chemistry,which is characterized by a rigid six-membered ring sandwiched by an amide group and a terminal free oxygen radical,was also investigated with both experiments and quantum mechanical(QM)*** measurement results show that C12Amide-TEMPO outperforms the conventional OFMs of glyceryl monooleate(GMO)and stearic acid,particularly for load-carrying capacity,wear reduction,and stability of friction over *** friction and wear reduction effect of C12Amide-TEMPO is also greatly superior to those of C12Ester-TEMPO and C12Amino-TEMPO,in which ester and amino groups replace the amide group,highlighting the critical role of the amide *** QM calculation results suggest that,in contrast to C12Ester-TEMPO,C12Amino-TEMPO,and the conventional OFMs of GMO and stearic acid,C12Amide-TEMPO can form effective boundary films on iron oxide surfaces with a unique double-layer structure:a strong surface adsorption layer owing to the chemical interactions of the amide oxygen and free radical with iron oxide surfaces,and an upper layer owing to the interlayer hydrogen-bonding between the amide hydrogen and free radical or between the amide hydrogen and ***,the intralayer hydrogen-bonding in each of the two layers is also *** suggest that in addition to strong surface adsorption,the interlayer and intralayer hydrogen-bonding also increases the strength of the boundary films by enhancing the cohesion strength,thereby resulting in the high tribological performance of *** findings in this study are expected to provide new hints for the optimal molecular design of OFMs.

关键词： organic friction modifiers(OFMs) TEMPO friction and wear surface adsorption molecular reactivity boundary lubrication

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A 300-GHz-Band 36-Gb/s Scalable 2-D Phased-Array CMOS Double Superheterodyne Receiver

IEEE Solid-State Circuits Letters

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IEEE Solid-State Circuits Letters 2025年 8卷 133-136页

作者： Tanaka, Satoshi Hara, Shinsuke Takano, Kyoya Kasamatsu, Akifumi Sugimoto, Yoshiki Sakakibara, Kunio Kubo, Shunichi Yoshida, Takeshi Amakawa, Shuhei Fujishima, Minoru Hiroshima University Graduate School of Advanced Science and Engineering Higashi-Hiroshima7398530 Japan Advanced ICT Research Institute National Institute of Information and Communications Technology Koganei184-8795 Japan Hiroshima University Graduate School of Advanced Science and Engineering Higashi-Hiroshima739-8530 Japan Tokyo University of Science Faculty of Science and Technology Department of Electrical Engineering Noda278-8510 Japan Nagoya Institute of Technology Graduate School of Engineering Nagoya Japan THine Electronics Inc. Development Department Chiyoda101-0053 Japan

This letter presents a near-λ/2-antenna-pitch 2-D phased-array CMOS receiver to address the challenge of implementing sub-THzbeamforming with the narrow λ/2 (≈ 555 μm at 270 GHz) antennapitch. A double superheterodyne architecture is adopted to reduce thearea occupied by the 2-D RX array circuits by locating the E- and H-plane phase control circuits outside the array. Additionally, interpolatedfeeding is employed to enlarge the area available for the RX circuits byenabling an n-by-n array of RX elements to feed a near-λ/2-pitch (2n –1)-by-(2n – 1) antenna array composed of main and auxiliary antennas.A 40-nm CMOS prototype with 2×2 RX elements feeding 3×3 antennaelements demonstrate beam scanning ranges of approximately ±20◦ and±30◦in the E- and H-planes, respectively, and achieves 36-Gb/s QPSKsignal transmission over a distance of 5 cm. © 2018 IEEE.

关键词： Antenna phased arrays

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Predictive Vehicle control at Intersections with Look-Ahead Driving Approach

Predictive Vehicle Control at Intersections with Look-Ahead ...

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2025 SICE International Symposium on control systems, SICE ISCS 2025

作者： Magzhan, Atykhan Hossain, Md Delowar Bakibillah, A.S.M. Kamal, Md Abdus Samad Yamada, Kou Graduate School of Science and Technology Gunma University Kiryu Japan Institute of Science Tokyo Department of Systems and Control Engineering Tokyo Japan

ISBN: (纸本)9784907764852

This paper presents a look-ahead vehicle control scheme for efficient traffic management at signalized intersections. The proposed scheme predicts future driving states with a look-ahead approach as an extended adaptive cruise control (ACC) model. It maintains car-following behavior similar to human driving while predicting future states of traffic flow to minimize intersection clearing time and aggressive braking independently, similar to model predictive control (MPC) approaches. In contrast to MPC models that are computationally demanding and have limited practical applications due to real-time constraints, the proposed scheme uses a modified Intelligent Driver Model (IDM) with predictive adjustments. The efficiency of the control scheme is evaluated through simulations with multiple vehicles in intersection traffic scenarios, focusing on maintaining safe time headway within a traffic flow and ensuring efficient flows with higher intersection throughput. Comparative results indicate improvements in intersection clearance, human-like vehicle headway management, and enhanced traffic flow performance. © 2025 The Society of Instrument and control Engineers.

关键词： Adaptive cruise control

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A zeroth-order algorithm for distributed optimization with stochastic stripe observations

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science China(Information sciences) 2023年第9期66卷 297-298页

作者： Yinghui WANG Xianlin ZENG Wenxiao ZHAO Yiguang HONG School of Automation and Electrical Engineering University of Science and Technology Beijing Key Laboratory of Intelligent Control and Decision of Complex Systems School of Automation Beijing Institute of Technology Key Laboratory of Systems and Control Academy of Mathematics and Systems Science Chinese Academy of Sciences Department of Control Science and Engineering Tongji University

Recent years have seen a rising interest in distributed optimization problems because of their widespread applications in power grids, multi-robot control, and regression *** the last few decades, many distributed algorithms have been developed for tackling distributed optimization problems. In these algorithms, agents over the network only have access to their own local functions and exchange information with their neighbors.

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Analysis of the performance of robotic assembly systems considering the usage of tools or jigs for the task-board task in the WRS 2018

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advanced Robotics 2023年第20期37卷 1329-1346页

作者： Dobashi, Hiroki Ogawa, Koki Shibata, Mizuho Uemura, Wataru Yokokohji, Yasuyoshi Faculty of Systems Engineering Wakayama University Wakayama Japan Graduate School of Systems Engineering Wakayama University Wakayama Japan Department of Robotics Faculty of Engineering Kindai University Higashi-Hiroshima Japan Electronics Information and Communication Engineering Course Faculty of Advanced Science and Technology Ryukoku University Otsu Japan Department of Mechanical Engineering Graduate School of Engineering Kobe University Kobe Japan

A task-board task is a task in which robots perform a set of fundamental assembly operations related to the assembly of a specific product such as inserting a part into another part, tightening bolts and nuts, attaching flexible parts, etc. In the task-board task competition in the industrial robotics category of the World Robot Summit (WRS) 2018, 15 teams from around the world performed the task. In our previous work, we observed recorded videos of the competition frame by frame and manually investigated the performance of robotic systems of the top four teams, focusing only on whether robots contact target parts. In this paper, we introduce frame sets to represent mainly contact states between robots, tools, or jigs and target parts to be handled for such a frame-by-frame analysis of the recorded videos, and based on the frame sets, we analyze the performance of robotic assembly systems of other teams as well as the top four teams in the task-board task competition in the WRS 2018, considering the usage of tools or jigs. © 2023 Informa UK Limited, trading as Taylor & Francis Group and The Robotics Society of Japan.

关键词： Robotic assembly

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Three-phase AC Power Routing and Its Field Demonstration 50

Three-phase AC Power Routing and Its Field Demonstration

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50th Annual Conference of the IEEE Industrial Electronics Society, IECON 2024

作者： Takahashi, Ryo Nishihara, Daichi Hikihara, Takashi Department of Mechanical and Electrical Systems Engineering Kyoto University of Advanced Science Kyoto Japan Graduate School of Engineering Kyoto University Kyoto Japan

ISBN: (纸本)9781665464543

In this paper, the feasibility of three-phase AC power routing is shown with a power router designed for three-phase AC system. The feasibility of three-phase power routing is clarified based on not only the laboratory experiments but also field demonstration using the prototype of the SiC three-phase power router and self-owned power line along railway’s track. The demonstration shows that the circuit switching for the power routing causes no impact to the communication for railway’s control. © 2024 IEEE.

关键词： Demonstrations

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Speed Harmonic based Saturation Free Inductance Modeling and Estimation of Interior PMSM Using Measurements Under One Load Condition

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CES Transactions on Electrical Machines and systems 2025年第1期9卷 91-99页

作者： Guodong Feng Yuting Lu Zhe Tong Beichen Ding Guishan Yan Chunyan Lai the School of Intelligent Systems Engineering Sun Yat-sen UniversityShenzhenChina the School of Advanced Manufacturing Sun Yat-sen University the Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) China the Department of Electrical and Computer Engineering Concordia UniversityQCCanada

For permanent magnet synchronous machines(PMSMs),accurate inductance is critical for control design and condition *** to magnetic saturation,existing methods require nonlinear saturation model and measurements from multiple load/current conditions,and the estimation is relying on the accuracy of saturation model and other machine parameters in the *** harmonic produced by harmonic currents is inductance-dependent,and thus this paper explores the use of magnitude and phase angle of the speed harmonic for accurate inductance *** estimation models are built based on either the magnitude or phase angle,and the inductances can be from d-axis voltage and the magnitude or phase angle,in which the filter influence in harmonic extraction is considered to ensure the estimation *** inductances can be estimated from the measurements under one load condition,which is free of saturation ***,the inductance estimation is robust to the change of other machine *** proposed approach can effectively improve estimation accuracy especially under the condition with low current *** and comparisons are conducted on a test PMSM to validate the proposed approach.

关键词： PMSM Inductance estimation Speed harmonic High frequency signal injection

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