FEM simulation optimization and slab method on rotating extrusion of thin-walled round tube under constant shear frictionChang, K H; Huang, B C; Teng, H Y; Tzou, G Y
doi: 10.1088/1742-6596/2631/1/012024pmid: N/A
This research considering constant shear friction is to explore the rotating extrusion of thin-walled round tube based on FEM simulation and slab method, and compares the results of both models to realize the variations and acceptance. The effective stress, the effective strain, the velocity field, the average thickness, the extrusion force, and the extrusion torque can be obtained from this study. It reveals the average thickness obtained from rotating extrusion is more uniform than that obtained from no rotating extrusion. The FEM optimization for extrusion force can be combined with Taguchi method, the L934 orthogonal table considers the four control factors which are outer diameter to thickness ratio, frictional factor, rotating angular velocity, half die angle, and three levels. The ranking of influence factors and the optimization combination can be obtained from FEM simulation optimization. Eventually the extrusion force between FEM simulation and slab method is compared under rotating angular velocity, 0.2 rad/s, the maximum error is 10.49 % and the minimum error is -0.29%; the average error is 4.16%, so the trend is in good agreement each other. Therefore, the both models can be verified.
Discussion on the relationship between the power generation of single-crystal solar panels and various influencing factorsTseng, Y M; Mao, Z J; Fan, J H; Yang, X Y
doi: 10.1088/1742-6596/2631/1/012001pmid: N/A
Solar panels absorb a large amount of light energy from sunlight and convert it into electrical energy for use. How to increase power and reduce energy loss in various aspects is also the focus of research and development to improve conversion efficiency of solar panels.Set up 3.6kW solar power generator by single-crystal material to produce the Direct Current (DC) power and it is converted into an Alternating current (AC) power through an inverter which meets the parallel conditions of AC power system and supplies loadings with the national power grid at the same time. Meanwhile, a simple monitoring system of solar power was established to rectify and record the data of solar power generation resources and related parameters by big data to analysis the settlement classification relationship. According to the power generation characteristics of the single-crystal solar panels of the power generation by sampling and related parameter data can be used to observe the relationship between solar power generation efficiency, density of illumination, temperature of panel and actual power generation. The power generation of single crystal solar cells is closely related to photos and temperatures and has a short delay effect by statistics theory and methods.
Prefacedoi: 10.1088/1742-6596/2631/1/011001pmid: N/A
The 1st International Conference on Precision Machinery and Manufacturing Technology 2015 (ICPMMT) was held at Howard Beach Resort, Kenting, Taiwan on May 22-24, 2015. The papers submitted to ICPMMT 2015 were recommended to KEM (EI Compendex) through the peer reviewing process. The 2nd ICPMMT 2017 was held at Howard Beach Resort, Kenting, Taiwan on May 19-21, 2017. And the 3rd ICPMMT 2018 has moved to Auckland, New Zealand on 4-8 February, 2018. After conference, all papers submitted to ICPMMT 2017 and 2018 were recommended to MATEC Web of Conferences, Open-access Journal in Materials science, Engineering and Chemistry (Google Scholar, CAS, EI Compendex, Inspec, DOAJ, Web of Science, Scopus). All papers through the peer reviewing process could be published in MATEC Web of Conferences. The 4th ICPMMT 2019 was back to Howard Beach Resort, Kenting, Taiwan on May 24-26, 2019. All papers through the peer reviewing process can be published Key Engineering Materials and IOP: Materials Science Engineering with EI Compendex. The 5th ICPMMT 2020 was taken place in Crowne Plaza, Auckland, New Zealand on February 3-7 2020. Some papers through the peer reviewing process have been published in Journal of Physics: Conference Series, and Solid State Phenomena with EI Compendex. The 6th ICPMMT 2021 was back to Howard Beach Resort, Kenting, Taiwan on May 21-23, 2021. The 7th ICPMMT 2022 because of COVID-19 still held in Howard Beach Resort, Kenting, Taiwan on May 20-22, 2022. Some full papers through the peer reviewing process were be published in Journal of Physics: Conference Series with EI Compendex.Since 2022 JPCS started to request all full papers to upload the Morressier submission system for the reviewing process. The similarity of all full papers should be checked to keep the papers quality well. The 8th ICPMMT 2023 due to COVID-19 still took place in Howard Beach Resort, Kenting, Taiwan on May 19-21 2023. All full papers accepted through very strict peer reviewing process can be recommended to Journal of Physics: Conference Series (JPCS) with EI Compendex Publication. However, the committee cannot guarantee all papers can be published in JPCS, because JPCS team will review again just depends on the paper quality, the scope, and the reviewers’ comments. Therefore, the full papers publication decided by JPCS team can be published in Journal of Physics: Conference Series with EI Compendex.List of Committee of ICPMMT 2023 are available in this pdf.
Peer Review Statementdoi: 10.1088/1742-6596/2631/1/011002pmid: N/A
All papers published in this volume have been reviewed through processes administered by the Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing.Type of peer review: Single AnonymousConference submission management system: MorressierNumber of submissions received: 58Number of submissions sent for review: 35Number of submissions accepted: 35Acceptance Rate (Submissions Accepted / Submissions Received × 100): 60.35Average number of reviews per paper: 3.00Total number of reviewers involved: 55Number of final published papers:25Contact person for queries:Name: Gow-Yi TzouEmail: [email protected]: University of Wollongong, Australia Chung Chou University of Science and Technology, Taiwan
FEM simulation on forming vacuum hexagon socket screws using tube workpieceTeng, H Y; Tzou, G Y; Lu, C; Huang, G M
doi: 10.1088/1742-6596/2631/1/012019pmid: N/A
This study proposes a new forming design concept to produce vacuum hexagon socket screws using tube workpiece, and uses the finite element simulation software DEFORM-3D to simulate the multi-pass forming process of vacuum hexagon socket screws. The simulated material is SUS-304 stainless steel, and the frictional conditions are assumed to be constant shear friction, the die is assumed to be a rigid body. In the past, the traditional vacuum hexagon socket screw manufacturing process used a multi-pass process to manufacture a standard screw using a solid workpiece (wire rod), and then drilling an air channel in the core of the screw. This process not only wastes time, but also needs to increase the processing cost. In this study, the time and cost of drilling the air channel can be reduced by forming the vacuum hexagon socket head screw through the hollow tube. The finite element simulation results confirm that this design is a feasible method. The pass schedule can be reduced from 6 stages to 3 stages, the maximum effective stress decreased by 28.13%, and the total forming force decreased by 57.66%. The research results can be provided to relevant industry as the reference.
Development of a cell counting system based on machine learningWu, R C; Chiu, W C; Kuo, F T; Xu, H W; Wu, T T; Liu, C H
doi: 10.1088/1742-6596/2631/1/012023pmid: N/A
Endothelial cells of the aorta are an excellent model system for studying inflammatory responses, angiogenesis, atherosclerosis, blood clotting, vascular contraction, and vasodilation. Cell counting is necessary when culturing human aortic endothelial cells (HAECs) in order to determine cell concentration and quantity, as well as to assess cell viability and proliferation. Here, a machine learning-based image recognition system was developed to create a cell counter. The system’s hardware includes a digital microscope, Raspberry Pi, and operating screen. Image capture, image processing, machine learning, and computer recognition are utilized in the processing techniques. The processing steps consist of training and testing stages. In the training stage, five HAECs images were selected as training samples while the remaining HAECs images were used as testing samples. Positive and negative samples were labeled using LabelImg and used to generate training images for the classifier program. The classifier program was trained using the built-in Adaboost and LBP models in Opencv to create a HAECs classifier. The system achieved a recognition rate of 95% for HAECs and 98% for colon cells in practical tests, demonstrating that this technology can be used as a tool for cell counting and can replace expensive and potentially inaccurate commercial cell counting software, making cell counting a more practical technique.
Grey prediction-based proportional-integral controller applied to solar energy systemsChang, E C; Wu, T T; Tsai, C Y; Chang, Y W; Wu, R C
doi: 10.1088/1742-6596/2631/1/012002pmid: N/A
Proportional-integral (PI) controller with simple architecture as well as convenient design makes it widely adopted in the control of solar energy systems. Due to partial shading as well as fault influence, the solar panels tend to be trapped at regional extremely values, attenuating the dynamic and steady-state response. For the sake of strengthening the system control effectiveness, this paper employs a grey prediction-based PI controller to attain a global maximization of the wattage pointed following in sun power plate, providing a pure sine waveform with lower percentage of total harmonic distortion, in addition to fast transience of the solar energy system output voltage. The PI performs tracking control and simultaneously the grey prediction uses a logistic grey model to accurately predict the system state as well as to adjust the PI control parameters for establishing robust system response. The results reveal that the output of the solar system can produce fast dynamics and high efficient steady-state performance, thereby supporting the theoretical validity.
Design and analysis of marine permanent magnet synchronous motor based on Motor-cadLin, W; Liu, Z S
doi: 10.1088/1742-6596/2631/1/012008pmid: N/A
In the marine electric propulsion system, the motor is an important part to ensure safe navigation, which should have the characteristics of low noise, low vibration, high performance protection level, etc. The permanent magnet synchronous motor (PMSM) has the advantages of rapid dynamic response, stable operation, strong overload capacity, high efficiency and small size, which is especially suitable for electric propulsion systems in marine environments. According to the performance requirements of marine motors and the permanent magnet synchronous motor structural characteristics, an electromagnetic design and simulation of a 120kW marine permanent magnet synchronous motor is completed in this paper. Meanwhile, the stator skewed slot is used to reduce the amplitude of harmonic distortion and the additional torque caused by tooth harmonic. At same time, the rotor structure with U-shaped magnetic steel groove is used to enhance the density of power and overload capacity of the motor, expand the scope of motor constant power operation effectively. A prototype with high efficiency, reliability and a small volume has been developed. According to the simulation results, the marine permanent magnet synchronous motor designed in this paper fully meets the design requirements.
Properties of 6061 aluminum alloy treated with laser alloyingYang, Y S; Bai, T; Wang, T; Xie, Y W; Chen, H L
doi: 10.1088/1742-6596/2631/1/012021pmid: N/A
In this study, a laser surface alloying method is used to alloy 1.8 mm thick 6061 aluminum alloy sheets with Ni alloy powder. The mechanical properties of the resulting alloy are investigated. The experimental results show that, following laser surface alloying, a crack-free zone can be generated but some fine porosity appears. The hardness and the wear properties of the laser alloying specimens are superior to those of the Al-matrix. A hardness of 539 HV is achieved, which is five times greater than that of the Al-matrix. As a result, the laser alloying specimens exhibit excellent wear properties and higher sliding wear distances and speeds compared to those of the Al-matrix, whereby the sliding distance is greater by up to eight times and the sliding speed is increased four-fold.
Optimum design and research of switched reluctance motor for electric vehicle based on Motor-CadXu, J Q; Liu, Z S
doi: 10.1088/1742-6596/2631/1/012009pmid: N/A
With the development of the economy and the deepening of the energy crisis, electric vehicle has now become the hotspot of the global automotive industry. Therefore, as the key part of electric vehicle, the design and research of drive motor has become the focus of attention of engineers and technicians. Because of its simple structure, easy maintenance, high output power, high output torque, wide speed range, and high efficiency, the switched reluctance motor (SRM) has been one of the first choice of electric vehicle driving motors. According to the performance requirements of electric vehicle driving motors, a 3-phase 24/16 pole with rated power of 30 kW switched reluctance motor (SRM) for electric vehicle has been designed in this paper by using Motor-Cad which can be used to optimize the parameters of motor to make the overall structure of the motor more reasonable. In order to reduce the torque ripple of switched reluctance motor, appropriate stator polar arc and rotor polar arc design are used in the motor. To realize the speed control of switched reluctance motor in a wide range, PWM control mode is adopted in this paper, which has fast motor response speed, high power factor and excellent dynamic and static performance. The simulation results show that the performance indexes of the switched reluctance motor meet the design requirements completely.