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检索条件"机构=Graduate Program in Mechatronics Engineering"

共 155 条记录，以下是61-70 订阅

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Using Finite Element Analysis and Experimental Analysis on Vibration of a Piezoelectric Micro Pump

Using Finite Element Analysis and Experimental Analysis on V...

引用

2015 Workshop 8

作者： Bo-Wun Huang Jung-Ge Tseng Chien-Hua Chang Chen-Yuan Li Graduate Institute of Mechatronics Engineering Cheng Shiu University Medical Mechatronics Engineering Program Cheng Shiu University Department of Mechanical Engineering Chinese Culture University

Due to the rise of biological and MEMS technology in recent years, some micro flow system components have drawn attention and been developed by many investigators. The importance of micro-pumps manufactured is higher than the other part of micro flow system since it is the power source of the entire micro-flow system and responsible for driving working fluid in the microfluidic system. In actual operation, the instability and bad dynamic characteristics of the micro-pump will cause larger fluid flow mobility error, such as transport behavior and response procedures failure, etc., and even damage the microfluidic system. Therefore, to investigate the stability and dynamic characteristics of a micro pump is necessary. The Finite element analysis（FEA）, ANSYS Workbench, is employed to analyze the dynamic characteristics of this micro pump, and experiment is also considered in this study.

关键词： Component Micro Pump Finite Element Analysis Piezoelectric

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Hardware Implementation of a GMDH Controller for Mobile Robot Obstacle Following/Avoidance

Hardware Implementation of a GMDH Controller for Mobile Robo...

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IEEE Latin American Robotics Symposium, LARS

作者： M. A. Pastrana L. H. Oliveira M. S. Santana V. C. Oliveira Jose Mendoza-Peñaloza Daniel M. Muñoz Department of Mechanical Engineering Mechatronics Graduate Program Faculty of Gama Electronics Engineering Undergraduate Program University of Brasilia Brasilia DF Brazil

Proportional, integral, and derivative (PID) controllers have been widely adopted for industrial applications. However, these controllers are not very efficient for non-linear systems. Artificial neural networks (ANN) based on the Group Method of Data Handling (GMDH) have great potential to replace the PID controllers due to their polynomial structure, allowing complex non-linear systems to be controlled. This work presents a hardware architecture of a GMDH network applied to speed control of a mobile robot platform. The proposed GMDH controller was implemented using a 16-bit floating-point arithmetic representation and was mapped on a Zynq7020 device. A hardware-in-the-loop based on the Universal Direct Memory Access methodology was developed to validate the proposed circuits, allowing for performance comparisons between a classical PID and the GMDH controllers for different simulated scenarios.

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Implementation of a PID Controller using Online Tuning Applied to a Mobile Robot Obstacle Following/Avoidance

Implementation of a PID Controller using Online Tuning Appli...

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Argentine Conference on Electronics (CAE)

作者： M. A. Pastrana L. H. Oliveira D. A. Mendes Douglas. L. Silva Jose Mendoza-Peñaloza Daniel M. Muñoz Department of Mechanical Engineering Mechatronics Graduate Program Faculty of Gama Electronics Engineering Undergraduate Program University of Brasilia Brasilia DF Brazil

The implementation of a bioinspired PID-based controller with online tuning capabilities is developed for obstacle following/avoidance of a nonholonomic mobile robot. An innovative mixture of the conventional PID controller and particle swarm optimization (PSO), which has a strong capability of adaptation across unknown scenarios, reduced objective error, brings us a novel online tuning methodology that can derive optimal controller parameters for a given scenario. It is appropriate for a kind of plant without prior knowledge or established mobile robot model. Computer simulation for obstacle following/avoidance is carried out in four different scenarios using the CoppeliaSim software and the EVA mobile robot platform. The effectiveness of the proposed control algorithm is demonstrated trough the simulation experiment, which shows its superior performance in the training scenario, including an overshoot of 20.1 %, a settling time of 10 seconds, and a steady-state error of 0.76%.

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Evaluation of a 429 MHz Band Multiple Folded Planar Inverted-F Antenna Near the Human Body

Evaluation of a 429 MHz Band Multiple Folded Planar Inverted...

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IEEE Global Conference on Consumer Electronics (GCCE)

作者： Kanata Muto Katsuyuki Fujii Yasuyuki Okumura Graduate Program of Mechatronics Graduate School of Science and Engineering Nanzan University Nagoya Japan Nanzan University Nagoya Japan

ISBN: (数字)9781728198026

ISBN: (纸本)9781728198033

When mobile communication terminals are used, miniaturized antennas interact with the human body. For example, a planar inverted-F antenna, which is a typical small antenna, is the result of the application of various miniaturization techniques. In previous research, a multiple folded planer inverted-F antenna working at a 429 MHz band was proposed to be mounted on a housing. However, the evaluation of the performance of this equipment has not been established near the human body. Therefore, in this paper, its behavior is evaluated through simulation and measurement. The specific absorption rate is also evaluated through this simulation.

关键词： Impedance matching Mobile antennas Mobile communication Specific absorption rate Reflection coefficient Antennas Standards

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Robust control of active suspension to improve ride comfort with structural constraints

Robust control of active suspension to improve ride comfort ...

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International Workshop on Advanced Motion Control (AMC)

作者： Fumiaki Yamada Kohei Suzuki Tatsuo Toda Gan Chen Isao Takami Faculty of Science and Engineering Nanzan University Aichi Japan Graduate Program of Mechatronics Nanzan University

This paper proposes the robust H2 controller with constraints for the active suspension using the half car model. The purpose of this study is to improve the ride comfort with satisfying the structural constraints. According to International Organization for Standardization 2631, there exist the uncomfortable frequency bands of the human body. The uncomfortable frequency bands are 4–8[Hz] for the vertical acceleration and 0.63–0.8[Hz] for the pitch angular acceleration. In this paper, the acceleration in the specific frequency bands is suppressed by using frequency shaping. On the other hand, the active suspension has the structural constraints which are constraints on the vertical force of the wheel, the suspension stroke, and the control input. They are expressed as the time-domain constraints. In addition, the robust stability for the perturbation of the front and rear weights of the car body is guaranteed. The perturbation of the weights of the car body affects the pitch motion of the car body and the vertical force of the wheels. The robust stability for the perturbation is guaranteed by using the polytopic representation. The robust H2 controller is designed by solving a finite set of LMIs to achieve the purposes. The effectiveness of proposed controller is evaluated by simulations and experiments.

关键词： Suspensions Wheels Acceleration Force Robustness Mathematical model Robust stability

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Evaluation of the Electric Field Distribution during Bending for Wearable Two-Dimensional Communication Sheets in the 2.4-GHz Band

Evaluation of the Electric Field Distribution during Bending...

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IEEE Global Conference on Consumer Electronics (GCCE)

作者： Ibuki Uda Katsuyuki Fujii Yasuyuki Okumura Graduate Program of Mechatronics Graduate School of Science and Engineering Nanzan University Nagoya Japan Faculty of Science and Engineering Nanzan University Nagoya Japan

ISBN: (数字)9781728135755

ISBN: (纸本)9781728135762

A communication medium known as a wearable two-dimensional communication sheet that can locate multiple small devices on clothes is being researched. By wearing the sheet, the desired communication may not be achieved because the sheet is bent owing to human movement. Therefore, in this study, we employ the finite-difference time-domain (FDTD) method to evaluate the electric field distribution inside the sheet in the 2.4-GHz band by considering the bending angle of the sheet to be a parameter.

关键词： Electric fields Finite difference methods Time-domain analysis Insulators Sensors Surface waves

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Superposition of Next Generation PON to Existing PON's OOK Signals

Superposition of Next Generation PON to Existing PON's OOK S...

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IEEE Global Conference on Consumer Electronics (GCCE)

作者： Shoki Ogawa Yasuyuki Okumura Katsuyuki Fujii Graduate Program of Mechatronics Graduate school of Sience and Engineering Nanzan University Nagoya Japan Faculty of Science and Engineering Nanzan University Nagoya Japan

ISBN: (数字)9781728135755

ISBN: (纸本)9781728135762

Recent research into raising the speed and capacity of optical access networks has focused on converting RF (Radio Frequency) signals into optical signals. One approach to efficient transmission, combining wide spread OOK (ON-OFF Keying) systems with phase modulation, is being actively researched. However, studies to date have considered only the downlink. This paper focuses on the uplink of optical access networks and proposes a method for demodulating superimposed OOK and phase modulation signals.

关键词： Optical modulation Phase shift keying Passive optical networks Optical distortion Uplink

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Evaluation of TCM to Coexisting OOK and PSK in Optical Access

Evaluation of TCM to Coexisting OOK and PSK in Optical Acces...

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IEEE Global Conference on Consumer Electronics (GCCE)

作者： Yuki Kuno Yasuyuki Okumura Katsuyuki Fujii Graduate Program of Mechatronics Graduate school of Sience and Engineering Nanzan University Nagoya Japan Faculty of Science and Engineering Nanzan University Nagoya Japan

ISBN: (数字)9781728135755

ISBN: (纸本)9781728135762

Studies for enhancing network speed and capacity to handle the rapid increases in traffic are being conducted. Even in optical access, which is the backbone network, studies on next generation modulation schemes that utilize phase and amplitude, rather than modulation by conventional light intensity, are being conducted. However, it is difficult to update all the terminals at once, and there is a possibility that signals with old and new modulation schemes coexist on one optical fiber. Such situations are known to yield high error rates. Therefore, this study evaluates the effectiveness of TCM (Trellis Coded Modulation), which is an error correcting scheme.

关键词： Adaptive optics Error analysis Modulation Optical network units Passive optical networks Extinction ratio Optical fibers

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Improved quantum-inspired evolutionary algorithm with diversity information applied to economic dispatch problem with prohibited operating zones

Improved quantum-inspired evolutionary algorithm with divers...

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作者： Neto, Júlio Xavier Vianna De Andrade Bernert, Diego Luis Dos Santos Coelho, Leandro Pontifical Catholic University of Parana PUCPR Undergraduate Program at Mechatronics Engineering Imaculada Conceição 1155 Zip code 80215-901 Curitiba Parana Brazil Pontifical Catholic University of Parana PUCPR Industrial and Systems Engineering Graduate Program LAS/PPGEPS Imaculada Conceição 1155 80215-901 Curitiba Parana Brazil

The objective of the economic dispatch problem (EDP) of electric power generation, whose characteristics are complex and highly nonlinear, is to schedule the committed generating unit outputs so as to meet the required load demand at minimum operating cost while satisfying all unit and system equality and inequality constraints. Recently, as an alternative to the conventional mathematical approaches, modern meta-heuristic optimization techniques have been given much attention by many researchers due to their ability to find an almost global optimal solution in EDPs. Research on merging evolutionary computation and quantum computation has been started since late 1990. Inspired on the quantum computation, this paper presented an improved quantum-inspired evolutionary algorithm (IQEA) based on diversity information of population. A classical quantum-inspired evolutionary algorithm (QEA) and the IQEA were implemented and validated for a benchmark of EDP with 15 thermal generators with prohibited operating zones. From the results for the benchmark problem, it is observed that the proposed IQEA approach provides promising results when compared to various methods available in the literature. © 2010 Elsevier Ltd. All rights reserved.

关键词： Optimization

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Study on the Reduction of the Local Specific Absorption Rate of a 1.2-GHz- Band Transceiver with a Reflector

Study on the Reduction of the Local Specific Absorption Rate...

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IEEE Global Conference on Consumer Electronics (GCCE)

作者： Yu Kumita Katsuyuki Fujii Yasuyuki Okumura Graduate Program of Mechatronics Graduate School of Science and Engineering Nanzan University Nagoya Japan Faculty of Science and Engineering Nanzan University Nagoya Nagoya Japan

ISBN: (数字)9781728135755

ISBN: (纸本)9781728135762

Amateur radio stations, which use greater radiation power than smartphones, are expected to have a high specific absorption rate (SAR). However, few studies have explored the electromagnetic wave exposure in amateur stations. In this paper, we propose mounting a reflector on a 1.2-GHz-band monopole antenna that is mounted on a transceiver-simulating metallic case. Numerical analysis was performed through the finite-difference time-domain (FDTD) method using a simple brain-equivalent model and a numerical model of the human body. The results demonstrated that the SAR can be reduced through the proposed method without greatly altering the antenna characteristics.

关键词： Brain modeling Numerical models Transceivers Analytical models Reflector antennas Finite difference methods Antenna radiation patterns

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