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SSRN 2024年

作者： Kong, Wenting Fu, Shaohai Pan, Yunlu Jiangsu Engineering Research Center for Digital Textile Inkjet Printing Key Laboratory of Eco-Textile Ministry of Education Jiangnan University 1800 Lihu Rd Wuxi214122 China Key Laboratory of Micro-Systems and Micro-Structures Manufacturing Ministry of Education School of Mechatronics Engineering Harbin Institute of Technology Xidazhi 92 Harbin 150001 China

Smart membranes with rapidly adjustable superwettability can adapt to different needs and address more complex situations, which provides a new idea for dealing with the growth of oily domestic wastewater and leakage of industrial oils issues. Herein, a superhydrophobic coating with adjustable wettability and robust durability has been fabricated on the cotton fabrics. The superhydrophobic fabric can rapidly transfer to SHI/UWSOB based on the "wetting-displacing" process and recover original wettability after drying. Moreover, the underwater oil contact angle could be adjusted by controlling the ratio of the TiO2 particles and PVDF-HFP, and the coating thickness. Then, an underwater superoleophobic/superoleophilic patterned cotton fabric was fabricated to imitate the Stenocara beetle through the combination of different masks and spraying methods. The oil droplets in the emulsion will be collected by these patterns and float above the water phase to separate the emulsion. The influence of the wettability pattern size on the efficiency and flux of separation also has been explored. The coated fabric can be applied to separate multiple types of oil-water mixtures with a separation efficiency of over 99%. © 2024, The Authors. All rights reserved.

关键词： Wetting

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基于摩擦伏特效应的超滑表征技术

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Science Bulletin 2024年第9期69卷 1197-1201页

作者：王昭政高凯冯源曹杰宫礼坤范贝贝张毅解国新张弛 CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 101400China State Key Laboratory of Tribology in Advanced Equipment Tsinghua UniversityBeijing 100084China School of Nanoscience and Engineering University of Chinese Academy of SciencesBeijing 100049China School of Electrical&Electronic Engineering Nanyang Technological UniversitySingapore 639798Singapore Center on Nanoenergy Research School of Physical Science and TechnologyGuangxi UniversityNanning 530004China Institute of Intelligent Flexible Mechatronics Jiangsu UniversityZhenjiang 212013China Institute of New Materials and Advanced Manufacturing Beijing Academy of Science and TechnologyBeijing 100084China

Friction occurs in our daily lives, and statistics have shown that it consumes approximately 1/3 of the primary energy. In addition,mechanical interface friction significantly impacts the efficiency,noise, accuracy, corrosion, reliability, and operational lifespans of equipment. Several studies have revealed various methods for reducing the coefficient of friction (COF) to the superlubricity state(COF <0.01) through efficient lubrication technology.

关键词： friction corrosion energy.

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Age-Based Sensitivity Analysis on Cardiac Hemodynamics using Lumped-Parameter Modelling

Age-Based Sensitivity Analysis on Cardiac Hemodynamics using...

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IEEE EMBS Conference on Biomedical engineering and Sciences (IECBES)

作者： Siti Munirah Muhammad Ali Wahbi El-Bouri Mohd Jamil Mohamed Mokhtarudin Faculty of Manufacturing and Mechatronics Engineering Technology Universiti Malaysia Pahang Malaysia Liverpool Centre for Cardiovascular Science University of Liverpool and Liverpool Heart & Chest Hospital United Kingdom

Age is a major risk for heart failure, which is associated with the reduction in ventricular compliance, increase in arterial stiffening, and increase in systemic vascular resistance. In this study, a lumped-parameter model is used to investigate the effect of aging on the possibility of heart failure occurrence. Model parameters including the systemic and pulmonary arterial compliance and resistance, and the left ventricular elastance are calculated for different ages using a ratio-based method. These parameters are then used in the lumped-parameter model. Our findings show that as age increases, there is a leftward and a rightward shift in the left ventricle and right ventricle pressure-volume loops, respectively. For the left ventricle, there is a decrease in stroke volume and an increase in ventricular pressure as the age increases. This correlates with the occurrence of arterial hypertension in the older population. Meanwhile, the right ventricular pressure is maintained as the population gets older, despite the increase in the stroke volume. This is possibly due to the shift in intraventricular septum that causes an enlargement of the right ventricle as the age increases. This study provides understanding on the effect of age on the occurrence of heart *** study demonstrates the relationship of aging with cardiac hemodynamics, which provides the potential risk of heart failure occurrence. Although there are many risk factors that can cause heart failure, aging has been strongly associated with its occurrence. Understanding how age affects heart failure can help to differentiate them from other effects such as dietary, gender, and early cardiovascular diseases including arrhythmia and myocardial infarction.

关键词： Resistance Analytical models Sensitivity analysis Sociology Aging Myocardium Hemodynamics

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Correction to: On the use of adjoint gradients for time-optimal control problems regarding a discrete control parameterization

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Multibody System Dynamics 2023年第3期59卷 335-336页

作者： Lichtenecker, Daniel Rixen, Daniel Eichmeir, Philipp Nachbagauer, Karin TUM School of Engineering and Design Department of Mechanical Engineering Chair of Applied Mechanics Munich Institute of Robotics and Machine Intelligence (MIRMI) Technical University of Munich Munich Germany Institute of Mechanics and Mechatronics Vienna University of Technology Wien Austria Faculty of Engineering and Environmental Sciences University of Applied Sciences Upper Austria Wels Austria Institute for Advanced Study Technical University of Munich Garching Germany

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Safety-Optimized Fast Charging of Lithium-ion Battery Based on Distributional SAC-Conservative Augmented Lagrangian SDRL Algorithm

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IEEE Transactions on Vehicular technology 2025年

作者： Chen, Liping Tao, Yuxin Lopes, Antonio M. Chow, Mo-Yuen Chen, YangQuan Hefei University of Technology School of Electrical Engineering and Automation Hefei230009 China University of Porto LAETA/INEGI Faculty of Engineering Rua Dr. Roberto Frias Porto4200-465 Portugal Shanghai Jiao Tong University University of Michigan Shanghai Jiao Tong University Joint Institute Shanghai200240 China University of California Lab of Mechatronics Embedded Systems and Automation MercedCA95343 United States

The widespread utilization of electric vehicles depends on the advancement and optimization of fast battery charging technology. To tackle the dual challenges of attaining rapid charging while guaranteeing safety, a novel safety-enhanced fast charging strategy for lithium-ion batteries (LIBs) is presented, utilizing a thermal and health-aware safe deep reinforcement learning (SDRL) approach. Specifically, this work introduces an innovative approach by employing distributional reinforcement learning in LIBs fast charging control, simultaneously optimizing safety constraint issues. The proposed distributional soft actor critic-conservative augmented Lagrangian (DSAC-CAL) algorithm mitigates the overestimation of the reward value function while avoiding the underestimation of the cost value function. Both simulation and real-world charging experiments are conducted to validate the strategy's effectiveness. Compared to advanced deep deterministic policy gradient-based and soft actor-critic-based strategies, the proposed method exhibits superior optimality and stability, confirming its significant performance advantages. Furthermore, in contrast to model predictive control-based charging strategies, it offers superior real-time adaptability and proves more efficient in practical charging scenarios. Software code developed in this research is available at https://***/yxTao7/DSAC-CAL. © 1967-2012 IEEE.

关键词： Fast charging Lithium-ion battery Safe deep reinforcement learning Thermal safety

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Real Life Monitoring of Conveyor Line Speed Using IoT and Raspberry Pi

Real Life Monitoring of Conveyor Line Speed Using IoT and Ra...

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2021 International Conference on Intelligent technology, System and Service for Internet of Everything, ITSS-IoE 2021

作者： Al-Shahethi, Mohammed Gamal Muneer, Amgad Ghaleb, Ebrahim A. A Darshi, Sam Almohammedi, Akram A. Asia Pacific University Of Technology Innovation School Of Engineering Malaysia Mechatronics Engineering Sana'a University Sana'a Yemen Universiti Teknologi PETRONAS Department Of Computing And Information Sciences Perak Malaysia Indian Institute Of Technology Ropar Department Of Electrical Engineering Punjab India South Ural State University Automobile Transportation Department Chelyabinsk Russia Mechatronic Engineering Department Karabük University Karabük Turkey

ISBN: (纸本)9781665433051

Manual monitoring is time-consuming and frustrates the industry with high costs and delays in the process. This study presented a remote monitoring system for a direct current (DC) motor based on Internet of Things (IoT) for safe and economic data communication in industrial fields. A single sensor monitors the DC motor speed and sends it to the Raspberry Pi microcontroller, which sends it to the cloud database for remote monitoring. The system also presents the manual control methods to adjust the motor speed using a simple potentiometer. Therefore, the proposed system has three functions: measuring, monitoring, and controlling. Measuring is based on an optoisolator sensor and an Arduino Mega microcontroller. Controlling is based on the Potentiometer, Arduino Uno, and a motor drive circuit. Monitoring is based on Raspberry Pi and ThingSpeak platform. Firstly, the speed sensor HC-020K senses the speed Data. Secondly, Arduino Mega extracts the HC-020K sensor's data as a suitable revolution per minute and sends it to Raspberry Pi. Thirdly, Raspberry Pi sends the data to ThingSpeak's Server. Lastly, based on the experiments performed, the system has proved to be very useful and reliable. © 2021 IEEE.

关键词： Microcontrollers

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A Novel Robotic System Enabling Multiple Bilateral Upper Limb Rehabilitation Training via an Admittance Controller and Force Field

TechRxiv

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TechRxiv 2023年

作者： Jiao, Ran Liu, Wenjie Rashad, Ramy Li, Jianfeng Dong, Mingjie Stramigioli, Stefano Beijing Key Laboratory of Advanced Manufacturing Technology Faculty of Materials and Manufacturing Beijing University of Technology Beijing100124 China The Robotics and Mechatronics Group Faculty of Electrical Engineering Mathematics and Computer Science University of Twente Enschede7545VL Netherlands ITMO University Saint Petersburg Russia

Patients with hemiplegia are usually restricted to performing general bilateral activities of daily life (gbADLs). Bilateral training has been verified to contribute to the rehabilitation of physical functions. Although robotic systems are gradually being employed in the field of rehabilitation, few studies have performed simulations with regards to gbADLs for training. Therefore, a novel end-effector bilateral rehabilitation robotic system (EBReCS) for the upper limb is developed in this article for the task rendering of gbADLs, in which the gbADL-corresponding workspace is obtained via modularly designed bilateral parallelogram mechanisms, and interaction rendering of multiple bimanual modes (uncoupled, trans-soft-coupled, trans-semi-coupled, and rotation-coupled) is achieved by implementing the admittance model, the inner force field between robotic end-effectors, and the outer force field distributed around. Experiments of the proposed four rehabilitation training modes were carried out on the healthy subject, with the results showing a feasible method of the EBReCS in the simulation of multiple bimanual coordinated rehabilitation training tasks. In the future, the constructed EBReCS is expected to be clinically tested and exploited for home rehabilitation as a coordinated training device. © 2023, CC BY.

关键词： End effectors

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Mutual Impacts of Different Dead-times and Control Sample Times on SiC Inverter Loss in Experimental Motor Drive at High Carrier Frequencies

Mutual Impacts of Different Dead-times and Control Sample Ti...

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International Conference on Communications and Electronics, ICCE

作者： Nguyen Gia Minh Thao Van-Long Pham Kutsukake Asuka Keisuke Fujisaki Ton Duc Do Department of Mechanical Electrical and Electronic Engineering Interdisciplinary Faculty of Science and Engineering Shimane University Matsue Japan Department of Automation School of Electrical and Electronic Engineering Hanoi University of Science and Technology Hanoi Vietnam Next Generation Tatara Co-Creation Centre Shimane University Matsue Japan Electromagnetic Energy System Laboratory Toyota Technological Institute Nagoya Japan Department of Robotics and Mechatronics School of Engineering and Digital Sciences Nazarbayev University Astana Kazakhstan

ISBN: (数字)9798350379792

ISBN: (纸本)9798350379808

At high pulse-width modulation (PWM) carrier frequencies up to 200 kHz using silicon carbide (SiC) devices, the individual and mutual impacts of the sample time and dead-time on the SiC inverter loss in a motor drive system may become significantly. Thus, these issues under load condition are experimentally investigated and analyzed in the present study, where the dead-time is from 250 to 1000 ns and the control sample time is from 100 to 1000 μs. Furthermore, the measured results with the SiC metal–oxide-semiconductor field-effect transistor (MOSFET) inverter are briefly compared to that with the silicon (Si) insulated-gate bipolar transistor (IGBT) inverter for reference. Moreover, the total harmonics distortion (THD) of the measured voltage and current of the considered interior permanent magnet synchronous motor (IPMSM) is provided to explain the results. Finally, insights with theoretical analysis are shown as complementary explanations of the experimental findings. The outcome of this research can be treated as a reference in choosing the suitable value of the control sample time for IPMSM drive systems using SiC-MOSFET inverters.

关键词： Semiconductor device measurement Time-frequency analysis Motor drives Voltage measurement Magnetic field measurement Silicon carbide Current measurement

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Exploring Fuzzy Signatures in Sensor Fusion: A Comparative Study with the Complementary Filter

Exploring Fuzzy Signatures in Sensor Fusion: A Comparative S...

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International Symposium on Computational Intelligence and Informatics

作者： Ahmet Mehmet Karadeniz Áron Ballagi László T. Kóczy Doctoral School of Multidisciplinary Engineering Sciences Széchenyi István University Györ Hungary Department of Automation and Mechatronics Széchenyi István University Györ Hungary Department of Information Technology Széchenyi István University Györ Hungary

ISBN: (数字)9798350353433

ISBN: (纸本)9798350353440

Sensing has become a pivotal element in the development of autonomous systems with the advancement of the technology. These systems operate on a sense-think-act cycle to execute tasks, necessitating the integration of multiple sensors. The challenge of synthesizing meaningful information from diverse data sources escalates with the complexity of the data. This study tackles the issue of sensor data complexity by investigating the potential of Fuzzy Signatures, which are promising in handling complex data due to their hierarchical structures. The main goal is to present a concept for sensor fusion based on Fuzzy Signatures, which may facilitate their use in autonomous system tasks. To demonstrate this concept, accelerometer and gyroscope data are utilized, with results compared to those from a Complementary Filter providing insight into the sensor fusion capabilities of Fuzzy Signatures. The study also underscores the importance of aggregation operators in Fuzzy Signatures, focusing on the Max and WRAO (weighted relevance aggregation operator) aggregation operators. The potential to employ various aggregation operators or to develop new ones for specific applications is highlighted. The findings indicate that Fuzzy Signatures could be an effective solution for sensor fusion challenges, offering prospects for enhancement and broader application in autonomous systems.

关键词： Autonomous systems Soft sensors Focusing Sensor fusion Sensor systems Complexity theory Gyroscopes Informatics Intelligent sensors Computational intelligence

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Improved Method of Multi-objective Particle Swarm Algorithm Learning Factor Based on Fitness Change

Improved Method of Multi-objective Particle Swarm Algorithm ...

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Artificial Intelligence and Computer engineering (ICAICE), International Conference on

作者： Jingchen Xie Guoxin Luo Hanlin Yin Chenyao Li Jiayang Pu Xueli Zhang Suyu Wang Unit: China University of Mining and Technology (Beijing) School of Mechatronics and Information Engineering Beijing China

ISBN: (纸本)9781665421874

Aiming at the problem that the inertial component of particles could not guide the particle to the right direction when the fitness became poor, a multi-objective particle swarm algorithm learning factor improvement method based on the fitness change was proposed. The large learning factor improved the multi-objective particle swarm algorithm. In the simulation experiment, the improved algorithm PSO-AIC1C2 and the PSO-S, PSO-AIC1 and PSO-AIC2 with c 1 and c 2 obtained by splitting this algorithm were fixed with c 1 and c 2 changed separately, and then compared with other PSO improvements. The algorithms MOPSO, SMPSO, and dMOPSO are compared. Experiments showed that increasing c 1 could improve the performance of the algorithm, and increasing c 2 would cause the convergence of the algorithm to deteriorate. In most test functions, PSO-AIC1C2 had obvious advantages in convergence and distribution indicators. The improved method proposed had certain guiding significance for the study of learning factors of particle swarm optimization in the future.

关键词： Learning (artificial intelligence) Particle swarm optimization Convergence

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