KOSEN

Department of mechanical system engineering
National Institute of Technology, Okinawa College

National Institute of Technology

Development of the underwater robot forenvironmental research and protection in the
coastal sea area of Okinawa prefecture, Japan
Name

Fumiaki Takemura

StatusProfessor

E-mailtakemura@okinawa-ct.ac.jp

Affiliations

IEEE, The Robotics Society of Japan,
The Japan Society of Mechanical Engineers,
The Society of Instrument and Control Engineers

Keywords

Underwater robotics, Field robotics

Technical
Support Skills

・ Robotics
・ Mechatronics
・ Control engineering

Research Contents

Development of the underwater robot for environmental research and protection

We have been developing the underwater robot for coral reefs research and protection in the coastal sea
area of Okinawa, Japan.
1. Development of the underwater robot for crown-thorns starfish control
Crown-of-thorns starfish die by injecting the acetic acid. We succeeded to inject the acetic acid intocrown-of thorns starfish by Remotely Operated underwater Vehicle (ROV).
2. Image-based position measurement of underwater objects
Visual recognition of distant underwater objects is possible in the water with high transparency, forexample, in the coastal sea area of Okinawa, Japan. So, we have been researching the image-based
position measurement system of underwater objects using a low-cost maritime mobile robot with amonocular camera.

Fig. 1 Prototype of the developed underwater robot

Available Facilities and Equipment

Fig. 2 Position measurement of an underwater object

KOSEN

Dept. Mechanical Systems Engineering,Nat. Inst. Tech. (KOSEN), OKINAWA College

National Institute of Technology

A Microscopic Internal Structure Analysis
for Crystallographic Metals
Name

HIGA, Yoshikazu

StatusProfessor, Dr. Engng.

E-maily.higa@okinawa-ct.ac.jp

Affiliations

The Japan Society of Mechanical Engineers (JSME)The Society of Materials Science, Japan (JSMS)

Keywords

SEM/EBSD, AFM, Nano-Indentation, Visualization

Technical
Support Skills

・ Crystallographic Orientation Mapping by SEM/EBSD Technique・ An Estimation of Material Characteristic using AFM & Nano-Indentation
・ An Observation of Internal Structure and a 3D-Structural Analysis using μCT

Research Contents

Visualization of 3D Crystallographic Defects using SEM/EBSD technique

Crystallographic grains and defects play an important role in many fundamental processes, such as grain
growth and recrystallization, damage, and plastic deformation. Due to the importance of these processes, there
is considerable interest in characterizing the crystallographic orientation and grain boundary distribution of
crystalline materials. In this study, an experimental investigation of the crystallographic defects, such as
dislocation arrays, grain boundaries and its orientations, using electron backscatter diffraction (EBSD) mappingwith a scanning electron microscope (SEM) have been performed in a commercial polycrystalline metals.

EBSD Equipment System Configuration

Local observation region and corresponding tocrystallographic orientation map

Dislocation Density Map, Grain Boundary Map, Inverse Pole Figure
Yoshikazu HIGA, Ken SHIMOJIMA and Takashi MAKISHI, Int. J. Multiphysics, Vol.9, No.1 (2015), 37-43.

Available Facilities and Equipment
SEM/EBSD (TSL Solutions)
Atomic Force Microscopy XE-100 (Park Sys.)
Nano-Indentation (Hysitron)KOSEN

Department of Mechanical Systems Engineering
National Institute of Technology, Okinawa College

National Institute of Technology

Theoretical Study of Evaporation Heat Transfer
in Horizontal Microfin Tubes
Name

Osamu Makishi

StatusProfessor

E-mailomakis@okinawa-ct.ac.jp

Affiliations

The Japan Society of Mechanical Engineers(JSME), The Heat
Transfer Society of Japan(HTSJ), Japan Society of Refrigeratingand Air Conditioning Engineers(JSRaE)

Keywords

phase change heat transfer, heat transfer enhancement

Technical
Support Skills

・ design of the heat exchanger
・ numerical analysis of heat transfer and fluid flow

Research Contents
A stratified flow model and an annular flow model of evaporation heat transfer in horizontal microfin tubes have been
proposed. In the stratified flow model, the contributions of thin film evaporation and nucleate boiling in the groove
above a stratified liquid were predicted by a previously reported numerical analysis and a newly developed correlation,
respectively. The contributions of nucleate boiling and forced convection in the stratified liquid region were predictedby the new correlation and the Carnavos equation, respectively. In the annular flow model, the contributions of
nucleate boiling and forced convection were predicted by the new correlation and the Carnavos equation in which theequivalent Reynolds number was introduced, respectively. A flow pattern transition criterion proposed by Kattan et al.
was incorporated to predict the circumferential average heat transfer coefficient in the intermediate region by use of thetwo models. The predictions of the heat transfer coefficient compared well with available experimental data for ten
tubes and four refrigerants

Fig.1 Physical model

Available Facilities and Equipment
Thermal Video System・TVS-8500(NIPON Avionics)
Thermal Constants Analyser・TPS2500(Kyoto Electronics)
Surface Tensionmeter・DY-700(Kyowa Interface Science)

Fig.2 Comparison of measured andPredicted αvalue

KOSEN

Department of Mechanical Systems Engineering
National Institute of Technology, Okinawa College

National Institute of Technology

Studies of Surface Modification of Metals
Name

MAKISHI Takashi

StatusProfessor

E-mailtmakishi@okinawa-ct.ac.jp

Affiliations

Japan Society of Mechanical Engineers

Keywords

Surface midification、Heat treatment、Special needs education

Technical
Support Skills

・Surface modification of Metals by using Plasma Nitriding
・Making and Improvement of teaching materials for special needs education

Research Contents
My research field is surface modification of metals by means of plasma nitriding process.
Characteristics of nitirided materials, fatigue properties are investigated in mystudies.
Making and improvement of teaching materials for special needs education are also carried out in ourlaboratory.

Fig. Typical microstructure ofnitrided layer (low carbon steel at
610℃）

Available Facilities and Equipment
Optical microscope
Scanning electron microscope
X-ray diffraction analysis

Fig. Example of S-N diagram before and after
nitriding treatment, low carbon steel, niturisingtemperature at 570℃and 610℃.

Department of Mechanical Systems Engineering

KOSEN

National Institute of Technology, Okinawa College

National Institute of Technology

Advancement of mechanical system
Name

Ken Shimojima

Status

Associate Professor

E-mailk_shimo@okinawa-ct.ac.jp

Affiliations

JPFE

Keywords

CMM, 5MC , Processing, Design(AutoCAD,SokidWorks)

Technical
Support Skills

・Design and Manufacturing of machine mechanism
・Processing of metal material
・Measurement（CMM）

Research Contents①Estimation of geometric deviation method by artifact at five axis control machining
centerEstimation of geometrical deviation by measurement.
②Development of food processing machine by underwater shock wave
Food processing technology by underwater shock wave. It is possible on non-heating
milling flour, sterilization, softening, and the extraction. Design and manufacturing of
disintegrator and carrier machine to demanded food.
③Development of underwater fixed point camera with maintenance free
The camera is fixed at the bottom of the sea, and the ocean weather-ship observation of
one month is possible.
④Study of cutting and junction property of composite materials (FRP)
Evaluation of various processing properties of composite materials

Available Facilities and Equipment
CMM-Mitsutoyo
5MC-Mazak

KOSEN

Dept. of Mechanical Systems Engineering
National Institute of Technology, Okinawa College

National Institute of Technology

Welding & Joining, and Secondary Operation of
Miscellaneous Materials by Heating
Name

TSUMURA Takuya

Status

Associate Professor

Affiliations
Keywords

E-mailtsumura@okinawa-ct.ac.jp

Japan Welding Society, The Japan Welding Engineering Society, The
Japan Institute of Light Metals, Japan Society of Mechanical Engineers,
The Society of Materials Science, Japan

Solid-state Welding, Dissimilar Materials, FSW, FSSW, Arc, Laser, Surface
Treatment

Technical Support ・ Welding and Joining of Dissimilar Metals
Skills・ Metal-surface Treatment by Various Kind of Heat Sources

Research Contents

Solid-state welding of dissimilar metals by using frictional heating

Solid-state welding of dissimilar metals by using frictional heating, like as Friction Stir Welding (FSW; asshown in Fig. 1）, Friction Stir Spot Welding (FSSW; as shown in Fig. 2) are investigated in my studies.
Example of dissimilar metal joining：・Pure copper to pure nickel by FSW (as shown in Fig. 3).
・Non-combustible magnesium alloy to galvanized steel sheets
by FSSW (as shown in Fig. 4).

Fig. 2 Process parameters of FSSW
method.

Fig. 1 Schematic illustration of FSW method and definition of
offset value for offset-FSW.

Fig.3 Appearance of pure copper to pure nickel
butt joint by offset-FSW.

Available Facilities and Equipment
Arc and Laser welding apparatus
Optical microscope
Scanning electron microscope
Energy dispersive elemental analyzer

Fig. 4 Comparison of tensile shear strength of
FSSW joints for non-combustible
magnesium alloy and various
galvanized steel sheets.

KOSEN

Department of Mechanical Systems Engineering
National Institute of Technology, Okinawa College

National Institute of Technology

Manufacturing Systems Analysis with Discrete
Event Simulation
Name

Toba Hiroyasu

E-mailtoba@okinawa-ct.ac.jp

Status

Associate Professor
IEEE, ACM, IPSJ (Information Processing Society of Japan),Affiliations
and JSME (Japan Society of Mechanical Engineers)
Keywords

systems simulation, manufacturing systems, production schedule, SCM

Technical
Support Skills

・ performance evaluation of discrete systems with systems simulation
・ analysis of discrete manufacturing systems
・ production scheduling algorithms

Research Contents
The objectives of this research include undergraduate education and training in manufacturing systems
engineering. Our research interest focuses on risk management in manufacturing systems through the useof virtual factories. We provide several research themes for undergraduate students who are interested indiscrete mechanical systems such as robots or inspection instruments. We guide students to implement
virtual factories by using commercially available discrete event systems simulators, and to develop several
manufacturing systems based on their ideas or their inspirations and their experimental results.
Students of our undergraduate course finally learn to manage the risks by themselves in introducing their
original manufacturing system developed in virtual factory, by thinking rationality from stand points ofquality and reliability or maintainability.
Figure 1 shows process flows of two contest robot, these process flows are implemented into the virtual
factory under several scenarios of manufacturing systems developed for two contest robots production.
Figure 2 depicts probability distributions of lead time obtained from experimental results. The results show
the effectiveness of their manufacturing systems developed for.

Sce1 Sce2 Sce3

確 率 密 度 [% ]確率分布

図2: Aチームリードタイム分布
30
20
10
0
130

140

150

160

170

180

190

200

210

リードタイム[時間]Sce1

図3: Bチームリードタイム分布

Sce2

Sce3

確 率 密 度 [% ]
確率分布

30
20
10
0
130

140

150

160

170

180

190

200

210

リードタイム [時間]Figure 1．Process flows of Contest Robot Prototype
Available Facilities and Equipment
systems simulator Arena 14.7 (Rockwell Software)
3D graphics simulator Auto Mod 12.3 (Applied Materials)

Figure 2．Two Prototype Lead Time Distributions

KOSEN

Department of Mechanical Systems Engineering
National institute of Technology, Okinawa College

National Institute of Technology

Evaluation of Fracture Mechanics of Material
Name

Kiyotaka MASAKI

Status

Associate professor

E-mailmasaki-k@okinawa-ct.ac.jp

Affiliations

The Japan Society of Mechanical Engineers
The Society of Materials Science, JapanThe Japan Institute of Light Metals

Keywords

Material Strength, Fatigue , Surface modification, X-ray Computing Tomography

Technical
Support Skills

・ Investigation of fatigue property
・ Evaluation of material strength
・ Investigation of fracture mechanism

Research Contents
・ Investigation of fatigue property
Conduct of the fatigue test
(Axial fatigue, Plane bending fatigue, Rotating bending fatigue, Torsion fatigue)
Obtain of the S-N diagram
・ Evaluation of material strength
Obtain of the tensile strength, Hardness, Stress strain curve
Detection of internal defects of material with X-ray CT
・ Investigation of fracture mechanism
Find out the cause of fracture by fractography with SEM

UH-F500kNI

PBF-30X, 60X

PBF4-10

ORB-10AG-IS 10kN

EHF-EM 100kNI

CRB-MS-1

TOSCANER 32300uhd

Available Facilities and Equipment
Plane bending fatigue testing machine

PBF-30X, 60X

Rotating bending fatigue testing machine

ORB-10Cantilever type fatigue testing machine

CRB-MS-1

Hydraulic servo fatigue testing machine EHF-EM 100kNI
High speed axial fatigue testing machine PBF4-10
Industrial X-ray CT

TOSCANER 32300uhd

Autograph AG-IS 10kN

Micro scope (SEM, OM, SM, etc. )Universal testing machine UH-F500kNI

Hardness tester, X-ray diffraction analyzer etc.

KOSEN

National Institute of Technology, Okinawa College
Department of Mechanical Systems Engineering

National Institute of Technology

Studies on design and development of control
systems
Name

Kentaro Asato

Status

Lecturer

E-mailk_asato@okinawa-ct.ac.jp

Affiliations

IEEJ, ISCIE, SICE

Keywords

Control engineering, Control theory, Soft computing

Technical
Support Skills

・ Design and development of control system based on control theory
・ Design and development of control system based on soft computing
・ Development of educational material for science and technology
・ Study on order reduction of controllers and models

Research Contents

Design and development based on control theory and soft computing(1) Development of nursing care devices
Because of declining birthrate and aging population, there is the critical labor
shortage for nursing care in Japan. Furthermore, in order to prevent thelong-term care, support apparatus for health maintenance is required. In thisstudy, we are developing useful nursing care devices.
(2) Development of educational materials for learning science and technology
It is essential to acquire logical thinking based on mathematics in educationof science and technology. In this study, we are developing a balancing robot,
magnetic levitation system, and ball & beam apparatus as the educational
materials, which are suitable to obtain the logical thinking.
(3) Development of magnetic levitation system
Applications of magnetic levitation (maglev) control provide many benefits.
However, construction of maglev systems require a high-cost in most cases. In
this study, we are developing a Hall element displacement sensor with neuralnetwork in order to achieve lower-cost maglev system.
(4) System-order reduction
From the perspectives of system maintenance, implementation cost, and soon, it is a consequential problem to reduce the high order of system. In thisstudy, we are trying to devise novel system-order reduction methods by using
generalized Gramians and LMIs.
(5) Development of a Pumped-Storage Generation System using Batteryless
Photovoltaics
In this study, we have been developing a micro-waterwheel generator. The
micro-waterwheel generator is applied to the pumped-storage generation
system using batteryless photovoltaics.
Available Facilities and Equipment
Programmable Logic Controller (Mitsubishi Electric)

Active suspension system (Quanser)

Matlab (Mathworks)

3DOF helicopter (Quanser)

Scilab (Scilab enterprises)

Magnetic levitation system (Original system)

Inverted pendulum (Servotechno)

Motor control experiment system (Original system)

Inverted pendulum with high fidelity linear cart (Quanser)

Department of Mechanical Systems Engineering
National Institute of Technology, Okinawa College

Research on Fluid dynamics and Aerodynamics
Name

Seiichiro MORIZAWA

Status

Lecturer

E-mailmorizawa@okinawa-ct.ac.jp

The Japan Society for Aeronautical and Space Sciences (JSASS)

Affiliations
Keywords
Technical
Support Skills

The Japan Society of Mechanical Engineers (JSME)The Japan Society for Computational Engineering and Science(JSCEM)
computational fluid dynamics (CFD), data mining, multi-objective optimization
・Fluid analysis for transport equipment
・ Information visualization

Research Contents① Aerodynamic design for future aircrafts
For the conceptual design of the future aircraft, the aerodynamic characteristics and flow fields of theforward-swept and bio-inspired wings have been investigated with the genetic algorithm and CFD. A newtype of wingtip devises are also discussed to reduce the induced drag of the aircraft as following figure.

② Feasibility study on roadable aircraft
We have been investigated the feasibility of roadable aircraft
between isolated islands using existing infrastructuresuch as local airports. The right figure shows an example
of a roadable aircraft modeling “Pegasus” and computed
by OpenVSP③ Data exploration for huge volume data
To obtain universal information on huge volume data (ex. 4D data: time-series+ space data ), it is necessary to examine of various data and reveal these
relations in a comprehensive manner. For this purpose, we have been suggested
new methods to analyze them. The right figure shows a visualization example of
the relations between temporal indices and flow induced vibration by Bayesian
network.

Available Facilities and Equipment