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22nd International Conference on Electronics Packaging, ICEP 2023

作者： Jhu, W.Y. Cheng, H.C. Feng Chia University Department of Aerospace and Systems Engineering Taichung Taiwan Feng Chia University Ph.D Program of Mechanical and Aeronautical Engineering Taichung Taiwan

ISBN: (纸本)9784991191152

This study aims to give an accurate estimate of the effective thermal-mechanical properties of a coreless circuit substrate for advanced IC packages. To achieve the goal, a subdomain-based effective method is proposed, incorporating a sub-domain three-dimensional (3D) copper trace mapping and modeling (TMM) method, a volume-averaging rule of mixture (ROM) technique and finite element modeling. Furthermore, the proposed effective method is combined with an FEA-based process simulation framework to investigate the process-induced warpage of a flip-chip chip scale package during fabrication. At last, parametric analysis is performed to identify the crucial factors influencing the process-induced warpage of the package. © 2023 Japan Institute of Electronics Packaging.

关键词： Substrates

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Influence of ZnO Nanoparticle Dispersed Baheda Oil Biodiesel Blend in Variable Compression Ratio Diesel Engine: Vibration and Noise Assessment

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Journal of The Institution of Engineers (India): Series C 2021年第4期102卷 941-949页

作者： Sanatha, Kaki Bhatti, Sukhvinder Kaur Jaikumar, Sagari Engineering and Technology Program Rushikonda Visakhapatnam India Department of Mechanical Engineering Andhra University Visakhapatnam India Department of Mechanical Engineering GITAM Institute of Technology Visakhapatnam India

The present study is intended for the vibration and noise analysis of variable compression ratio diesel engine operating with zinc oxide (ZnO) nanoparticle dispersed with Baheda oil biodiesel blend (BOME20). The ZnO nanoparticles were taken at the following proportions of 50 ppm, 75 ppm, and 100 ppm. Further, the QPAN dispersant was added to nanoparticles at 1:1 ratio. The compression ratio was altered from 16.5 to 19.5 by keeping the speed constant at 1500 rpm. The vibration (velocity) and noise characteristics were stated in terms of RMS values. The RMS velocity together with RMS noise was seen lower for B20 than diesel fuel. Further, the dispersion of nanoparticles has depicted a significant reduction in vibration and noise. The least RMS velocity and RMS noise was attained with BOME20 + 75 ppm ZnO + 75 ppm DSP compared to other fuels. But the compression ratio enhancement has shown a gradual increase in vibration and noise. At a compression ratio of 16.5, the lower intensity of vibration and noise of BOME20 + 75 ppm ZnO + 75 ppm DSP were 0.0792 m/sec and 55.2 dB, respectively. © 2021, The Institution of Engineers (India).

关键词： Biodiesel

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An Intelligent Controller for an Assisted Electric Wheelchair based on Interval Type-2 Fuzzy Logic

An Intelligent Controller for an Assisted Electric Wheelchai...

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2023 Advances in Science and engineering Technology International Conferences, ASET 2023

作者： Al-Bashayreh, Qutaiba A. H. Kiftaro, Ammar Alsheikh, Mahmoud Jaradat, Mohammad A. American University of Sharjah Mechatronics Engineering Gradute Program Sharjah United Arab Emirates American University of Sharjah Mechanical Engineering Department Sharjah United Arab Emirates

ISBN: (纸本)9781665454742

This paper proposes an intelligent controller design for an assisted electric wheelchair using interval type-2 fuzzy logic controller. The controller design has been structured using cascaded fuzzy inference system with feedback loop to avoid obstacles. In addition, to control the dynamics of the wheelchair, a speed fuzzy inference system has been added to the proposed controller. The controller is designed so that the user input is firstly obtained from the wheelchair joystick. The surrounding obstacles, thereafter, are detected using the input of three sensors attached to the wheelchair. At each time step, and until reaching the target point, the performed controller output generates both the motion angle and the wheelchair speed commands. The performance of the controller is tested by simulating the wheelchair travelling in different navigation scenarios. The simulation results confirm the effectiveness of the presented controller. © 2023 IEEE.

关键词： Wheelchairs

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Development of Two-DOF Simultaneous Gravity Compensator for Mobile Manipulator

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IEEE robotics and Automation Letters 2025年第7期10卷 7118-7125页

作者： Soo Yeon Choi Hyunyong Lee Ji Man Park Hansol Kang Seong Won Nam Bum Su Yi Yeong Woo Son Jae Young Oh Jun Ha Song Bo Geun Kim Dae Geun Song Hyouk Ryeol Choi Department of Mechanical Engineering Sungkyunkwan University Suwon Republic of Korea AIDIN ROBOTICS Inc. Anyang South Korea Department of Intelligent Robotics Sungkyunkwan University Suwon Republic of Korea

A manipulator mounted on a mobility platform requires a design that simultaneously meets the demands for lightweight, compactness, and energy efficiency. A gravity compensator is an effective solution that mechanically offsets the gravity torque caused by the weight of the manipulator links, enabling the use of low-capacity motors while maintaining performance comparable to conventional systems. However, existing gravity compensators face notable challenges in terms of spatial efficiency and durability. To address these challenges, this study developed the two-DOF simultaneous gravity compensator based on a spring and slider-crank mechanism to compensate for the gravity torque generated by two consecutive pitch joints. Experimental results demonstrated a high torque compensation rate of 71.58% and a power reduction rate of 32.23% across the full range of motion of the two joints, further confirming consistency with theoretical predictions.

关键词： Gravity Torque Manipulators Springs Actuators Joining processes Energy efficiency Wires Visualization Training

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Hazmat Cooling Vest Temperature Using Heat Pipe and Thermoelectric 3rd

Hazmat Cooling Vest Temperature Using Heat Pipe and Thermoel...

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3rd International Conference on Experimental and Computational Mechanics in engineering, ICECME 2021

作者： Septiadi, Wayan Nata Dwipayana, Anak Agung Gde Agung Krisnanta Marianti, Komang Manik Nugraha, I Ketut Arya Aditya Shantika, I Made Pujanu Ary Ananta, I Gede Riski Suarsana, I Komang Wahyu Fatmawati, Ni Nengah Dwi Sulistiowati, Ni Made Dian Putra, Nandy Department of Mechanical Engineering Udayana University Badung-Bali Indonesia Bachelors Program in Mechanical Engineering Udayana University Bali Indonesia Department of Microbiology Faculty of Medicine Udayana University Bali Indonesia Mental Health Nursing Department Faculty of Medicine Udayana University Bali Indonesia Department of Mechanical Engineering Universitas Indonesia Kampus Baru UI-Depok Indonesia

ISBN: (纸本)9789811936289

Corona Virus (COVID-19) is a virus that is endemic almost all over the world, including Indonesia. COVID-19 was first confirmed by the World Health Organization (WHO) on December 31, 2019, in Wuhan City, Hubei Province, China, and then rapidly expanded outside of China. To suppress the Covid-19 case, medical volunteers are needed as the main actors in efforts to handle Covid-19 patients. This makes health care facilities also need to focus on the principles of health worker safety, not only focus on the principles of patient safety. This also makes health care facilities also need to focus on the principles of health worker safety, not only focus on the principles of patient safety. The use of hazmat clothes is one of the efforts to protect health workers when in contact with Covid-19 patients. Hazmat clothes are technically referred to as "encapsulated waterproof protective clothing" which is PPE that must be used for officers from the risk of contracting the Covid-19 virus through airborne droplets and contact with patients and patient body fluids. Although hazmat clothing is an important PPE for health workers to stay protected, the use of hazmat clothing for a long time often makes medical personnel feel uncomfortable when providing services. Based on the problems above, the researchers conducted a study on the heat pipe - thermoelectric hazmat suit cooling vest. This technology can absorb more heat than other methods by simply applying the principle of capillarity to the wicks on the pipe walls. schematic of testing a cooling vest on a hazmat suit. The loading on the thermoelectric is given through the DC - Power supply. The temperature data read by the sensor will be detected by the computer system using the NI 9123 and C-DAQ 9174 modules. The test results can be viewed using the NI LabView 2017 software. The temperature used in this experiment is the result of tests carried out for 30 min. Based on the tests that have been carried out, the heat pipe-based the

关键词： Cooling

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Quantitative Progress Evaluation of Post-stroke Patients Using a Novel Bimanual Cable-driven Robot

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Journal of Bionic engineering 2021年第6期18卷 1331-1343页

作者： Thiago Alves Rogério Sales Gonçalves Giuseppe Carbone Laboratory of Automation and Robotics School of Mechanical EngineeringFederal University of UberlândiaUberlândia38400-902Brazil Department of Mechanical Energy and Management EngineeringUniversity of Calabria87036RendeItaly

Rehabilitation is the most effective way to reduce motor impairments in post-stroke *** process demands several hours with a specialized *** resources and personnel shortages,the literature reports a high interest in robotic assisted rehabilitation ***,cable-driven robotic architectures are attracting significant research interest for post-stroke ***,the existing cable-driven robots are mostly unilateral devices allowing the rehabilitation only of the most affected *** leaves unaddressed the rehabilitation of bimanual activities,which are predominant within the common Activities of Daily Living(ADL).Thus,this paper presents a specific novel design to achieve bimanual rehabilitation tasks that has been named as BiCAR ***,this paper provides a full insight on the BiCAR system as well as on its dedicated developed software *** particular,BiEval software has been developed as based on a serious game strategy and a virtual reality environment to track the patient exercising duration,motion ranges,speeds,and forces over time for achieving a quantitative assessment of the rehabilitation ***,the paper presents the BiCAR/BiEval capabilities by referring to a pilot Randomized Controlled Trial(RCT).The clinical trials have been used to validate the BiCAR/BiEval in terms of engineering feasibility and user acceptance to achieve an innovative cost-oriented integrated hardware/software device for the bimanual assistive rehabilitation of post-stroke patients.

关键词： Cable-driven robots Low cost Stroke rehabilitation Bimanual Progress tracking Serious games

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Heading Angle Estimation Using Intelligent Fusion for Autonomous Vehicles

Heading Angle Estimation Using Intelligent Fusion for Autono...

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2023 Advances in Science and engineering Technology International Conferences, ASET 2023

作者： Barakat, Ali A. Jardat, Mohammad A. Elsergany, Ahmed M. Sherif, Nidal A. American University of Sharjah Mechanical Engineering Department Sharjah United Arab Emirates American University of Sharjah Mechatronics Engineering Graduate Program Sharjah United Arab Emirates

ISBN: (纸本)9781665454742

Low-cost navigation systems for ground vehicles often rely on the fusion with Global Positioning System (GPS) for improved state estimation. In this study a low-cost gyroscope is fused with a GPS for improved vehicle heading angle estimation using several Artificial Intelligence (AI) based architectures that include Shallow Neural Networks (SNN), Multi-Layer Neural Networks (MLNN), and Adaptive Neuro- Fuzzy Inference Systems (ANFIS). The primary goal behind using AI based sensor fusion is to obtain a highly accurate vehicle heading estimation suitable for autonomous navigation applications. When available, the GPS signal is used to correct the vehicle's heading angle. The neural networks and ANFIS methods both use the difference between the GPS signal and the heading angle from the integrated gyroscope as inputs. The performance achieved is shown and analyzed. According to the results obtained, the MLNN provides the most accurate heading estimates. © 2023 IEEE.

关键词： Global positioning system

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Raise Damping in Electro-Hydraulic Systems with Observed Pressure

Raise Damping in Electro-Hydraulic Systems with Observed Pre...

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Mechatronics and robotics engineering (ICMRE), International Conference on

作者： Xieli Zhang Damiano Padovani Department of Mechanical Engineering (Robotics) Guangdong Technion-Israel Institute of Technology Shantou China

ISBN: (数字)9798331509293

ISBN: (纸本)9798331509309

The growing interest in energy efficiency points the research for hydraulic systems to electro-hydraulic drives, specifically hydraulic actuators directly coupled to pumps driven by electric motors. This design eliminates functional energy dissipations and enables energy recovery but leads to inherently low damping. The consequence is that harmful payload oscillations deteriorate the position control's accuracy of the actuator. Therefore, raising the drive damping via pressure feedback is crucial and requires knowledge of the pressure in both actuator chambers. This paper investigates using pressure observation to that end (i.e., a virtual pressure sensor implemented via software replaces two physical pressure transducers). High-passed pressure feedback is introduced using a model-based design for setting up closed-loop position control. This approach is simulated numerically on a heavy-duty robotic manipulator. The results confirm that the payload oscillations are significantly reduced without affecting position tracking.

关键词： Damping Transducers Soft sensors Position control Observers Robot sensing systems Manipulators Sensor systems Oscillators Payloads

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Studies of exposure UV light, soil Burial, and storage ability effect on characteristics of biocomposite films

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Materials Today: Proceedings 2023年 87卷 218-224页

作者： Fitriani F. Aprilia S. Arahman N. Bilad M.R. Djuned F. Fathanah U. Meilina H. Amin A. Doctoral Program School of Engineering Post Graduate Program Universitas Syiah Kuala Banda Aceh 23111 Indonesia Department of Chemical Engineering Engineering Faculty Universitas Syiah Kuala Banda Aceh 23111 Indonesia Faculty of Intergrated Technologies Universiti Brunei Darussalam Bandar Seri Begawan BE1410 Brunei Darussalam Mechanical Engineering Department Engineering Faculty University of Abulyatama Lampoh Keude-Aceh Besar Indonesia

UV exposure, soil burial, and storage ability tests were carried out on biocomposite films with different concentrations of nanocrystal cellulose to study their biodegradability and morphological properties compared to neat whey protein films. The addition of nanocrystal cellulose as a natural filler to the whey protein based film can change a variety of properties such as strength, shelf life, biodegradability, and resistance to environmental conditions that are required in food packaging. The degradation films were assessed by UV exposure and soil burial tests. On the other hand, packaging ability is analyzed through storage tests under controlled conditions. After the analysis, changes in physical, chemical, and morphological properties were observed in the biocomposite film. From these results, we can conclude that the whey protein film with the addition of 3% nanocrystal cellulose would be a more favorable choice because of its better properties and suitability for the proposed biodegradable food packaging application. © 2023

关键词： Biocomposite films Biodegradability Nanocrystal cellulose Storage ability Whey protein isolate

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Nano-Ceramic Coating's Critical Contribution to Protect Centrifugal Pump Under Difficult Operating Conditions

Nano-Ceramic Coating's Critical Contribution to Protect Cent...

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2024 Advances in Science and engineering Technology International Conferences, ASET 2024

作者： Albtoush, Ahmed Almajali, Mohammed Almomani, Hesham Almahadin, Aziz Mutah University Mechanical Engineering Department Karak Jordan Rabdan Academy Defence and Security Program Abu Dhabi United Arab Emirates Hashmite University Industrial Engineering Department Zarqa Jordan Higher Colleges of Technology Faculty of Engineering Technology & Science Dubai United Arab Emirates

ISBN: (纸本)9798350344134

This work is done to investigate and assess the beneficial role and added value of employing a thin layer of nano-ceramic coating to protect the components of a centrifugal pump. A case study is considered, representing a centrifugal pump operating in the Arab Potash Company (APC). The ANSYS software package was used which implements numerical finite element analysis (FEA), 3D modeling, and mathematical simulations. Variables, including Von Mises stresses, deformations, and strains, were investigated associated with a number of situations related to the operation of corrosive potash salt and coating layer. Based on the numerical analysis, the research results revealed that employing a thin layer of ceramic coating protective layer could minimize the dynamic Von Mises strength's impact on the centrifugal pump's impeller and casing by 35.55%. Furthermore, it was found that utilizing a protective layer of thin-nano ceramic could alleviate the total deformations of the centrifugal pump's impeller and casing by 67.01%. It was found that using a protective layer of the thin nano-ceramic could mitigate the equivalent elastic strain on the centrifugal pump's impeller and casing by 90.14%. It was noted that maximum total deformations occur at the tip of the blades. Coating the centrifugal pump parts could improve its components' lifespan by reducing wear, corrosion, and abrasion rates. © 2024 IEEE.

关键词： Abrasion

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