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IIE Annual Conference and Expo 2014

作者： Aqlan, Faisal Lam, Sarah S. Ramakrishnan, Sreekanth Boldrin, Warren Industrial and System Engineering Program Department of Mechanical Civil and Environmental Engineering University of New Haven West HavenCT06516 United States Department Systems Science and Industrial Engineering State University of New York at Binghamton BinghamtonNY13902 United States IBM Corporation WalthamMA02451 United States IBM Corporation PoughkeepsieNY12601 United States

ISBN: (纸本)9780983762430

This paper presents a study that integrates lean manufacturing and ergonomic principles to redesign and improve the internal transportation process in a high-end server manufacturing environment. Transportation of electronic parts within the factories is an important issue. The current transportation carts present quality hazards to electronic parts and they were not designed to handle the right dimensions and quantities of the newly introduced products. Furthermore, the current flow of carts introduces waiting time for the carts in the assembly areas. Inefficient transportation not only increases the waiting times but also the transportation costs. The objective of this study is to improve the transportation process and redesign transportation carts that are currently used to transport parts between different areas in a high-end server manufacturing environment utilizing lean and ergonomic principles. A new lean-based flow of transportation carts is proposed to reduce the waiting time and transported distance by having separate carts for each area. The new design of the carts represents a Poke-Yoke that prevents the operators from stacking the cards. Ergonomic principles are also considered in the new design. The number of carts required is estimated based on historical demand, outcomes from containment actions, current processes, and inputs from the production-planning department. The new lean-based flow and design of carts have resulted in cost savings and cost avoidance.

关键词： Lean production

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Adaptive control of a tilt - roll rotor quadrotor UAV

Adaptive control of a tilt - roll rotor quadrotor UAV

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International Conference on Unmanned Aircraft systems (ICUAS)

作者： Fatih Şenkul Erdinç Altuğ System Dynamics and Control Graduate Program İstanbul Technical University İstanbul Turkey Department of Mechanical Engineering İstanbul Technical University İstanbul Turkey

In recent years quadrotor unmanned aerial vehicles are being used in various different studies. A regular quadrotor has fixed rotors. This inability to tilt its rotors lead to limited success in trajectory tracking due to controlling 6 DOF systems only with 4 input parameters. There are some studies on tilt rotor and tilt-roll rotor quadrotors that can compensate for versatile conditions. Some of these proposed quadrotors are able to hover and position hold at user defined desired angles unlike regular quadrotors. This study presents the design and control of a novel quadrotor system that can tilt its rotors independently so that it can adaptively update its rotor angles and speeds to compensate for more chaotic and realistic scenarios. After deriving the mathematical model, the designed control algorithms are explained by comparing with the latter studies' abilities. Proposed quadrotor with adaptive control is compared with regular and non-adaptive tilt-roll rotor type multicopters, in various simulations. The results show that the proposed design has clear advantages in certain situations, especially when environmental limitations and hardware inconsistencies and inefficiencies exist.

关键词： Unmanned aerial vehicles

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Cell Scaffolds: Expanded 3D Nanofiber Scaffolds: Cell Penetration, Neovascularization, and Host Response (Adv. Healthcare Mater. 23/2016)

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Advanced Healthcare Materials 2016年第23期5卷

作者： Jiang Jiang Zhuoran Li Hongjun Wang Yue Wang Mark A. Carlson Matthew J. Teusink Matthew R. MacEwan Linxia Gu Jingwei Xie Department of Surgery‐Transplant and Mary & Dick Holland Regenerative Medicine Program University of Nebraska Medical Center Omaha NE 68198 USA Department of Mechanical and Materials Engineering University of Nebraska‐Lincoln Lincoln NE 68588 USA Department of Surgery and Department of Genetics Cell Biology and Anatomy University of Nebraska Medical Center Omaha NE 68198 USA Department of Surgery VA Nebraska–Western Iowa Health Care System Omaha NE 68105 USA Department of Orthopedic Surgery and Rehabilitation University of Nebraska Medical Center Omaha NE 68198 USA Department of Neurosurgery Washington University School of Medicine Saint Louis MO 63110 USA

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Improving liver fibrosis diagnosis based on forward and backward second harmonic generation signals

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Applied Physics Letters 2015年第8期106卷

作者： Peng, Qiwen Zhuo, Shuangmu So, Peter T. C. Yu, Hanry Biosystems and Micromechanics IRG Singapore-MIT Alliance for Research and Technology 1 CREATE Way #04-13/14 Enterprise Wing Singapore138602 Singapore Institute of Laser and Optoelectronics Technology Fujian Normal University Fuzhou350007 China Computation and System Biology Program Singapore-MIT Alliance 4 Engineering Drive 3 E4-04-10 117576 Singapore Institute of Bioengineering and Nanotechnology A STAR The Nanos 31 Biopolis Way #04-01 Singapore138669 Singapore Department of Mechanical Engineering Massachusetts Institute of Technology CambridgeMA02139 United States Department of Biological Engineering Massachusetts Institute of Technology CambridgeMA02139 United States Department of Physiology Yong Loo Lin School of Medicine National University of Singapore Singapore117597 Singapore Mechanobiology Institute National University of Singapore Singapore117411 Singapore

The correlation of forward second harmonic generation (SHG) signal and backward SHG signal in different liver fibrosis stages was investigated. We found that three features, including the collagen percentage for forward SHG, the collagen percentage for backward SHG, and the average intensity ratio of two kinds of SHG signals, can quantitatively stage liver fibrosis in thioacetamide-induced rat model. We demonstrated that the combination of all three features by using a support vector machine classification algorithm can provide a more accurate prediction than each feature alone in fibrosis diagnosis. © 2015 AIP Publishing LLC.

关键词： Harmonic generation

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Cost optimization with solar and conventional energy production, energy storage, and real time pricing

Cost optimization with solar and conventional energy product...

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Innovative Smart Grid Technologies (ISGT)

作者： Ata Raziei Kevin P. Hallinan Robert J. Brecha Department of System and Engineering Management University of Dayton OH USA Department of Mechanical and Aerospace Engineering University of Dayton OH USA Department of Physics and Renewable and Clean Energy Program University of Dayton OH USA

Research is presented that investigates the potential for solar power generation with battery energy storage for reducing the effective cost of energy delivered to residential customers if real time pricing is present. A linear optimization approach is developed based upon a two-step process. In step one, given a specified solar array area and battery capacity, the optimal means to meet loads based upon grid power, solar power, and/or battery power is determined. This analysis considers an expected life-span of the solar panel. With these results established, in the next step, the capital costs for the solar arrays and batteries are considered for each point (solar area and battery capacity) in the design space. Ultimately, the results illuminate the most cost effective means to provide power to customers for the chosen system.

关键词： Batteries Solar energy Green products Communities

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Thermal characterisation of high-aspect-ratio nanoheaters using IR thermography

Thermal characterisation of high-aspect-ratio nanoheaters us...

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作者： Lee, Jun Hyung Cho, Young Hak Jang, Dong-Young Hong, Seok Kwan Kang, Jeong Jin Department of Mechanical System Design Engineering Seoul National University of Science and Technology 232 Gongneung-ro Nowon-gu Seoul139-743 Korea Republic of Program Seoul National University of Science and Technology 232 Gongneung-ro Nowon-gu Seoul139-743 Korea Republic of 397 Seokcheon-ro Ojeong-gu Bucheon-si Gyeonggi-do Korea Republic of

Recently, micro/nanoheater have been used and studied in various fields such as sensors. In particular, they have become important in biology and medicine. In this paper, we propose a novel measurement method which can indirectly measure the temperature distribution of a nanoheater's surface from side temperature measurements using infrared microscopes. Two different types of nanoheaters are fabricated and their thermal behaviours are analysed and characterised. They are fabricated in a top-down approach using silicon-on-insulator wafers and basic MEMS processes. Nanoheaters with a high-aspect-ratio are fabricated: a width of 200 nm, length of 100 μm and height of 30 μm. The nanoheater's surface is doped with boron by ion implantation for joule heating. Their thermal profile depending on their heat sink type was investigated. In conclusions, it is expected that a nanoheater with exact temperature control and thermally efficient structural design can be applied for bio-molecule manipulation. Copyright © 2014 Inderscience Enterprises Ltd.

关键词： Ion implantation

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Modeling and control of a novel tilt — Roll rotor quadrotor UAV

Modeling and control of a novel tilt — Roll rotor quadrotor...

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International Conference on Unmanned Aircraft systems (ICUAS)

作者： Fatih Şenkul Erdinç Altuğ System Dynamics and Control Graduate Program İstanbul Technical University Istanbul Turkey Department of Mechanical Engineering İstanbul Technical University Istanbul Turkey

The use of unmanned aerial vehicles (UAVs) for military, scientific, and civilian sectors are increasing drastically in recent years. The quadrotor platform has been used for many applications and research studies, as well. One of the limiting factors that prevents further implementation of the quadrotor system into applications, is the way quadrotor moves. It needs to tilt along the desired direction of motion. By doing this it can have necessary acceleration towards that direction. But tilting has the undesired effect of moving the onboard cameras' direction of view. This becomes an issue for surveillance and other vision based tasks. This study presents the design and control of a novel quadrotor system. Unlike previous study that uses regular quadrotor, this study proposes an alternative propulsion system formed by tilting rotors. This design eliminates the need of tilting the airframe, and it suggests superior performance with respect to regular quadrotor design. The mathematical model of the tiltable-rotor type quadrotor and designed control algorithms are explained. Various simulations are developed on MATLAB, in which the proposed quadrotor aerial vehicle has been successfully controlled. Comparison of the proposed system to regular quadrotor suggests better performance.

关键词： Rotors Aircraft Atmospheric modeling Acceleration Vehicles Mathematical model Equations

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Sensor Fault Detection and Isolation in the Quadrotor Vehicle Using Nonlinear Identity Observer Approach

Sensor Fault Detection and Isolation in the Quadrotor Vehicl...

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Conference on Control and Fault-Tolerant systems

作者： Younes Al Younes Hassan Noura Abdelhamid Rabhi Ahmed El Hajjaji Nedaa Al Hussien Mechanical Engineering Faculty at Higher Colleges of Technology Chairman of Electrical Engineering Department at United Arab Emirates University Information & System Lab - Control & Vehicle Group- at University of Picardie Electrical Engineering Program at United Arab Emirates University

ISBN: (纸本)9781479928569

The Fault Detection and Isolation (FDI) of a quadrotor vehicle, which is described by a nonlinear model, are tackled in this paper. The nonlinear identity observer is utilized to detect the various types of sensors faults, and the Generalized Observer Scheme (GOS) is used to isolate the faulty sensor. The robustness of the observer and its scheme is investigated through several simulation results to build the Decision- Making Unit (DMU) for the residuals. Various simulation results have validated the FDI method and shown the system performance towards different fault scenarios.

关键词： Quadrotor Vehicle Nonlinear Observer Observer Scheme Structured Residuals

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Pilot study of hydrogen-rich syngas production from ma bamboo (Dendrocalamus latiforus) by plasma reforming

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Taiwan Journal of Forest Science 2014年第4期29卷 239-249页

作者： Juan, Sun-Wen Wang, Chi-Sheng Huang, Jin-Cherng Wang, Ya-Nan Ting, Ching-Hua Shiah, Tsang-Chyi Liu, Su-Ling PhD Program of Agriculture Science National Chiayi Univ. 300 Syuefu Rd. Chiayi City60004 Taiwan Advanced Propulsion and Power System Research Center National Cheng Kung Univ. 2500 Jhongjheng S. Rd. Sec. 1 Gueiren Dist. Tainan71150 Taiwan Department of Wood Based Materials and Design National Chiayi Univ. 300 Syuefu Rd. Chiayi City60004 Taiwan School of Forestry and Resource Conservation National Taiwan Univ. 1 Roosevelt Rd. Sec. 4 Taipei10617 Taiwan Department of Mechanical and Energy Engineering National Chiayi Univ. 300 Syuefu Rd. Chiayi City60004 Taiwan Experimental Forest College of Bio-Resources and Agriculture National Taiwan Univ. 12 Chienshan Rd. Sec. 1 Chushan Township Nantou County55750 Taiwan

Major components of bamboo are solid hydrocarbons in the forms of cellulose, hemicellulose, lignins, and pentosan. The abundance of hydrocarbons indicates the potential of bamboo to be an excellent raw material to produce hydrogen. In this study, 1-yr-old ma bamboo (Dendrocalamus latiforus) was liquefed with polyethylene glycol and then treated with plasma steam reforming to produce hydrogen. Productivity levels of hydrogen at different bamboo concentrations and pyrolysis temperatures were experimentally and theoretically studied. The liquefaction and pyrolysis apparatuses were hence optimized. A maximum productivity occurred at a weight ratio of 1:10 of ma bamboo to water and a pyrolysis temperature of 800°C by plasma treatment.

关键词： Hydrogen production

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Three dimensional attitude estimation via the triad algorithm and a time-varying complementary filter

ASME 2012 5th Annual Dynamic Systems and Control Conference ...

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ASME 2012 5th Annual Dynamic systems and Control Conference Joint with the JSME 2012 11th Motion and Vibration Conference, DSCC 2012-MOVIC 2012 2012年 1卷 157-165页

作者： Wang, Yizhou Chang-Siu, Evan Brown, Matthew Tomizuka, Masayoshi Almajed, Mohammed I. Alsuwaidan, Badr N. Mechanical System Control Laboratory Department of Mechanical Engineering University of California Berkeley CA 94720-1740 United States National Satellite Technology Program King Abdulaziz City for Science and Technology Riyadh 11555 Saudi Arabia

ISBN: (纸本)9780791845295

An innovative implementation of attitude estimation in 3 degrees of freedom (3-DOF) combining the TRIAD algorithm [1] and a time-varying nonlinear complementary filter (TVCF) is derived. This work is inspired by the good performance of the TVCF in 1-DOF [2] developed for applications limited to small mobile platforms with low computational power. To demonstrate robust 3-DOF estimation, information from vector and rate-gyroscope measurements are fused. Simulation and experimental results demonstrate comparable performance to the extended Kalman filter (EKF) and improved performance over alternative methods such as sole gyroscope rate-integration and the TRIAD algorithm without the TVCF as a pre-filter. Copyright © 2012 by ASME.

关键词： Gyroscopes

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