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International Symposium on Electronic Materials and Packaging

作者： Yan-Cheng Liu Hsien-Chie Cheng Zong-Da Wu Ph.D. Program of Mechanical and Aeronautical Engineering Feng Chia University Taichung Taiwan ROC Department of Aerospace and Systems Engineering Feng Chia University Taichung Taiwan ROC

ISBN: (纸本)9781538656433;9781538656426

Fan-out Wafer-level Packaging (FOWLP) technology has become one of the most rapid packaging technologies which can meet consumer demand for electronic devices. Since there are many advantages to FOWLP, several important issues remain to be addressed, including yield, reliability, thermal performance, die shift, and warpage. Therefore, the main reasons that cause the yield problem of the FOWLP are the mismatch of temperature loading and coefficient of thermal expansion(CTE) among the components of the package, and the other reason is the chemical shrinkage of liquid type epoxy molding compound during the cure process. In this study, the main goal is to assess the process-induced warpage of FOWLP during the fabrication process. To predict the amount of warpage precisely, a process-dependent simulation model which includes the cure-induced shrinkage of the liquid type of molding compound obtained by measurement is proposed. To confirm the validity of the simulation model, the simulation results are compared to the online warpage measurement data. Finally, the influence of the material properties of molding compound parameters on the process-induced warpage is discussed.

关键词： Compounds Semiconductor device modeling Fabrication Packaging Solid modeling Wafer scale integration

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Tree of life – intelligent environment system station design

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IOP Conference Series: Materials Science and engineering 2019年第1期658卷

作者： Po-Chuan Chen Jiunn Fang Program of Mechanical and Aeronautical Engineering Feng Chia University Taichung City Taiwan Department of Aerospace and Engineering Feng Chia University Taichung City Taiwan

The three elements essential for life are sunshine, air, and water. This is an undeniable fact, but with advancements in technology, amenities such as electricity, smart phones, and the internet have become the urban versions of these essential elements for life. Most people living in cities desire constant connectivity. This connectivity requires significant electricity and access to a high-speed internet connection. The purpose of this research is to design a wind turbine system modelled after the shape of a tree with the blades built inside the tree. The power generated by the tree will be stored in a power bank located inside a station adjacent to the tree and will be available to the public. Additionally, there will be WLAN antennas built inside the tree branches to provide wireless internet signals. Finally, the electricity produced will be green energy, which will help us achieve the goal of eco-friendly but intelligent life.

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Study of CAE predictive analytics on structure design, molding and improved strength of plastic injection molded parts

Study of CAE predictive analytics on structure design, moldi...

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2017 IEEE International Conference on Applied System Innovation, ICASI 2017

作者： Peng, Hsin-Shu Huang, Po-Wei Liew, Kai-Fu Chien, Pai-Cheng Su, Wei-Jie Dept. of Mechanical and Computer-Aided Engineering Feng Chia University Taichung Taiwan Dept. of Ph.D Program of Mechanical and Aeronautical Engineering Feng Chia University Taichung Taiwan

ISBN: (纸本)9781509048977

In recent years, due to the raising of green manufacturing and environmental consciousness, the industrial equipment and molded product request toward energy saving, reducing cycle time and secondary process procedure. With high strength, high stiffness, high design possibility, better fatigue life and better corrosion resistance capability, PA66 polymer composite materials are gaining more and more attention in functional products. In this study, PA66 polymer composites material used in slide components molding to replace the original metal material. The results indicated that PA66 polymer composites add 2%wt MoS2 result higher tensile strength and flexural strength than the original polymer material. The value of increased strength of tensile strength is 8% and flexural strength is 27%. In addition, the CAE simulated results are successful to predictive molding characteristics and improve structural strength of molded parts. © 2017 IEEE.

关键词： Tensile strength

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Optimization Design of Wind Turbine Tunnel Based On Fluid Analysis Results

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IOP Conference Series: Materials Science and engineering 2019年第1期644卷

作者： Po-Chuan Chen Jiunn Fang Ph.D. Program of Mechanical and Aeronautical Engineering Feng Chia University No.100 Rd Wenhua Taichung Taiwan Department of Aerospace and Engineering Feng Chia University No.100 Rd Wenhua Taichung Taiwan

At present, the problem of wind turbines affecting flying organisms has been highly valued. Wind turbines will not only attack flying creatures through rotating blades, but also the flying organisms will affect the habitat of ground creatures because of the reduction of flying height. In this study, a fan with protection function is designed by designing a wind turbine system with a wind tunnel design that can be smoothly adopted by birds. Because the blade is not in direct contact with the wind, it is introduced into the blade through the wind tunnel. Therefore, in the design of the wind tunnel, not only the wind speed of the introduction is not weakened, but also the wind speed can be fastened through the structural angle. Therefore, the blades can be rotated as scheduled to achieve the purpose of wind power generation. In the design of the wind tunnel, the study conducted the wind speed test of the structure through continuous fluid analysis. In the results obtained, correct all structures that may affect wind speed and re-analyze to ensure that the wind speed can successfully to achieve the goal. At the same time, the maximum wind speed obtained will be used to test the torque and power generation by the formula to see if the design is able to reach the goal of power generating.

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Stock prices forecasting based on wavelet neural networks with PSO 5

Stock prices forecasting based on wavelet neural networks wi...

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5th International Multi-Conference on engineering and Technology Innovation, IMETI 2016

作者： Wang, Kai-Cheng Yang, Chi-I Chang, Kuei-Fang Ph.D. Program in Mechanical and Aeronautical Engineering Feng-Chia University Taichung40724 Taiwan Department of Applied Mathematics Feng-Chia University Taichung40724 Taiwan

This research examines the forecasting performance of wavelet neural network (WNN) model using published stock data obtained from Financial Times Stock Exchange (FTSE) Taiwan Stock Exchange (TWSE) 50 index, also known as Taiwan Stock Exchange Capitalization Weighted Stock Index (TAIEX), hereinafter referred to as Taiwan 50. Our WNN model uses particle swarm optimization (PSO) to choose the appropriate initial network values for different companies. The findings come with two advantages. First, the network initial values are automatically selected instead of being a constant. Second, threshold and training data percentage become constant values, because PSO assists with self-adjustment. We can achieve a success rate over 73% without the necessity to manually adjust parameter or create another math model. © The Authors, published by EDP Sciences, 2017.

关键词： Particle swarm optimization (PSO)

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Design and Simulation of a Porous Rectangular Board-Foldable Trolley

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IOP Conference Series: Materials Science and engineering 2019年第1期644卷

作者： Yau-Ren Shiau Jiunn Fang Yu-Lan Chen Department of Industrial Engineering and Systems Management Feng Chia University Taichung 407 Taiwan Department of Aerospace and Systems Engineering Feng Chia University Taichung 407 Taiwan Ph.D. Program of Mechanical and Aeronautical Engineering Feng Chia University Taichung 407 Taiwan

To reduce the structural weight and volume and satisfy an optimal balance of performance constraints, a study using a porous rectangular foldable board and structurally improved trolley model was conducted, and motion simulations were performed to derive the static and transient structural properties. The simulations revealed that the fatigue lifetimes of both the main structure and the porous boards were in a high-standard-value range, whereas the transient analysis indicated that both the directional deformation and equivalent stress exhibited minimal local values. For porous boards simply supported only on two sides, the trolley had a much smaller collapsed volume than other types of trolley. The static analysis indicated that this trolley prototype had a good safety coefficient and long fatigue lifetime. The transient analysis showed that the porous area had a higher strength and bending load than the non-porous area. The overall transient response was close to that of a steady-state, showing a negligible effect on the ***.

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A study on static structural of non-rotor unmanned aerial vehicle 5

A study on static structural of non-rotor unmanned aerial ve...

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5th International Multi-Conference on engineering and Technology Innovation, IMETI 2016

作者： Chen, Yu-Lan Fang, Jiunn Shiau, Yau-Ren Hung, Wei-Chun Ph.D. Program of Mechanical and Aeronautical Engineering Feng Chia University Taichung407 Taiwan Department of Aerospace and Systems Engineering Feng Chia University Taichung407 Taiwan Department of Industrial Engineering and Systems Management Feng Chia University Taichung407 Taiwan

Multi-rotor unmanned aerial vehicles (UAVs) have become common in recent years, but non-rotor UAVs are still relatively rare. This study used an aerodynamic model to replace the multi-rotor design concept and examine load bearing capabilities, specifically for delivery of medical goods by non-rotor UAV. We use static structural simulations for static analysis and fatigue analysis to investigate the capabilities of different structural materials. The simulation results combined fatigue strength verifications, structural safety factor calculations, and finite element analyses to calculate parameters like total deformation, stress ratios, and strain magnitudes to analyze structural fatigue life. The analyses indicated that the factors of safety and fatigue lifetimes of two structural materials far exceeded standard values. They can be used to optimize designs that prevent plastic deformation and breakage. Time and money are saved in the research and development process by carrying out these calculations and static analyses of physical properties before prototypes are actually built. © The Authors, published by EDP Sciences, 2017.

关键词： Safety factor

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Physical and chemical properties of corn, cassava, and potato starchs

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IOP Conference Series: Earth and Environmental Science 2018年第1期160卷

作者： A H D Abdullah S Chalimah I Primadona M H G Hanantyo Research Unit for Clean Technology Indonesian Institute of Sciences Bandung Indonesia Program Study of Material Engineering Faculty of Mechanical and Aeronautical Engineering Institute Technology of Bandung Bandung Indonesia

Starch-based plastic is developed for petroleum-based plastic material replacement. Thus, basic knowledge of starch properties is important. This research aimed to evaluate the physical and thermal properties of various potential starch, i.e. corn, cassava, and potato starch. Granule size, thermal property, and functional group of starch were determined by optical microsopy, DSC, and FTIR, respectively. Our results demonstrated that the properties of starch (e.g. granule morphology and thermal property) varied according to its different sources. Potato starch has a bigger granule size and lower gelatinization temperature compare to corn and cassava starch. This implied that the granule size of starch affected gelatinization temperature. The larger the granule size, the more easily the starch to be gelatinized.

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Emulation of analog audio circuits on FPGA using wave digital filters 16

Emulation of analog audio circuits on FPGA using wave digita...

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2nd International Conference on Communication and Information Processing, ICCIP 2016

作者： Hernandez, Diego Hsieh, Yi Lin Huang, Jin Ph.D. Program in Mechanical and Aeronautical Engineering Feng Chia University Taichung Taiwan Basic Research Department Merry Electronics Taichung Taiwan Department of Mechanical and Computer-aided Engineering Feng Chia University Taichung Taiwan

ISBN: (纸本)9781450348195

This paper presents a Wave Digital Filter (WDF) emulation system suitable for audio applications implemented on a Field programmable Gate Array (FPGA). The WDF structures are programmed in the reconfigurable FPGA CompactRIO via LabVIEW. When the system runs in real-time, the circuit parameters are controlled and monitored via a graphical user interface on a host computer. A tone control and a three way crossover filter are presented as application examples. The WDF emulations are validated by measuring the signals from the FPGA I/O modules with a data acquisition system. Measurement results confirm the accuracy of the presented examples and the reliability of CompactRIO to perform WDF audio circuit emulations. © 2016 ACM.

关键词： Graphical user interfaces

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Development in the national polytechnic institute of Mexico of a thermal vacuum chamber for environmental testing of aerospace components 67

Development in the national polytechnic institute of Mexico ...

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67th International Astronautical Congress, IAC 2016

作者： Favela, Daniel Lara González, Alma Rosa García García, Héctor Díaz Nájera, Marcelino Paul Soto Anzurez, Jessica Yobana Mayo Hernández, Carlos Alejandro Villaseñor Peñaloza, Cristian Diego Ortega, Luis Becerril Ramos, Netsaualkoyotl Romualdo García, Kevin Fernando Vázquez Sanchez, José Francisco García Herrera, Damian Gomez Aeronautical Engineering Program Superior School of Mechanical and Electrical Engineering Campus Ticoman National Polytechnic Institute of Mexico 600 Ticoman Street San Jose Ticoman Gustavo A. Madero Mexico City07340 Mexico

With the foundation of the Mexican Space Agency it was generated a new impulse for the space projects in Mexico;starting several projects related with the development of micro, nano and pico satellites, bringing together universities, research centers and startups. As part of the evolution of these projects, should be performed environmental testing to confirm whether a satellite can function properly in orbit;however, it is not possible to perform in Mexico because there are no specialized facilities. In order to fill this gap in the Mexican space capabilities, the National Polytechnic Institute of Mexico created an Aerospace Integration and Testing Laboratory focused in the performance of mechanical The project to develop a thermal vacuum chamber was presented to the Mexican Space Agency and it was supported through the Sector Fund for Research, Technological Development and Innovation in Space Activities. The project focuses on the development (not purchase) of a thermal vacuum chamber using commercially available compounds, grouped in an architecture developed and controlled by algorithms programmed by the team. An important aspect is that the main workforce is formed by last semester students of the careers of aeronautical engineering, Automatic Control and Mechatronics. The entire project is developed under a system engineering approach, a methodology that is not yet widely used in Mexico and is divided into three segments: -Test Chamber: responsible for the design of the pressure vessel following the guidelines of the standard ASME BPVC section VIII division 2 and optimizing the design to the available manufacturing process. -Pressure Control: focused on the design of the array to decrease the internal pressure of the Test Chamber until a barometric pressure of 1×10-5 Torr, and his control system. -Thermal Control: responsible for developing a systemcapable of varying the internal temperature of the test chamber in a controlled manner within the range of 173

关键词： Environmental testing

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