List of Dissertation Abstract （Environment and System Sciences System Design Course）
NameSupervisor

Title

Abstract
Rotary compressor losses are known friction and leakage losses between a vane and cylinder. As an
improvement of those losses, we focused on concentrated polymer brushes (CPB) which are

KokiKen

WATANABE

NAKANO

Durability of concentrated polymer

macromolecule. In this study, the purpose was to show the possibility of applying CPB to rotarybrushes in the vane edge loading

compressors. CPB coating vane was slid for a long time by the experimental apparatus simulating thesliding part of rotary compressor

compression mechanism. After that, the elastic modulus of vane surface was measured with thenanoindenter which is micro indentation tester. In this way, CPB was considered to remain in the valley ofthe roughness. Therefore, it is concluded that CPB has applicability to rotary compressors.
In this study discussed accuracy of Harmonic Polynomial Cell (HPC) method which is one of methods

ken ASAMI

Motohiko
MURAI

A Basic Study on Harminic

estimating fluid field numerically. Because example of this method is few, it is not known its accuracy andPolynomial Cell (HPC) Method forusefulness. In this study, I examined free surface shape of an oscillated rectangular water tank by using aEstimating 2D Fluid Field

newly developed numerical code based on HPC algorism. By comparing the result with the experimentalresults, the rational “dt” for the simulation is discussed.
Recently, reliable autonomous technology for UVs are developing. In many cases, teams of UVs canaccomplish tasks more efficient than single vehicle. Especially, this paper focuses heterogeneous group.

Keiuske AJIRO

TakehiroStudy on Control of Using Polarity

HIGUCHIof Heterogeneous Vehicles

Heterogeneous groups can be more distributed system than homogeneous groups. Control of heterogeneousgroup becomes complicated. So, we research about the gains and search optimal gains of polarity using
genetic algorithm. The results show that it is possible to search the optimum gain of the control law using
the polarity by using the genetic algorithm and the correlation of the optimal gain is not monotonicallyincreasing or decreasing.
A biological and mechanical system is the system which creatures interact with machines. Fishing systems

A Study of a State Recognition

are one of biological and mechanical systems. In this paper, I focused on a fishing system composed ofDaiki

Toshihiko

Method for Biological andfishing tools, an angler, and fish, investigated a state recognition method for fish using vibration data

ARAI

SHIRAISHI

Mechanical Systems by Vibration

measured by sensors attached to fishing tools, and conducted the state recognition for three states of fish. AsMeasurementa result, I indicate that the proposed method can partially conduct the state recognition of fish using
vibration data in fishing.

The offshore oil and gas industry has been growing rapidly against a background of environmental issues,
Motohiko
Yuko ISHIDAMURAIShunji
KATOA Study on Availability Evaluationof Disconnectable Moored Spar
Systems

galloping oil price and exhaustion of fossil fuels.

Therefore, it is important to develop ocean technologies

to meet increasing demand for offshore oil and gas. Disconnectable moored spar systems, which consists ofa moored spar buoy and articulated yoke system, are considered feasible in harsh nautical conditions. In thisstudy, we proposed new supply chain system of offshore oil/gas with disconnectable moored spar systems
and evaluated its availability.

Kazuya INOUE

Ken

Measurement of rotation of friction

NAKANO

vector generated in sliding friction

A device that can measure friction vector generated in sliding friction was developed. As a result obtainedby this device, it became clear that the rotation of the kinetic friction occurred with occurrence of the stickslip.
In general, mechanical property of material in numerical simulations are determined from results of several
material testings such as tension, compression, and shear testing.

TomoakiKazumiIHATA

MATSUI

Identification of Hyperelastic
Constitutive Law Considering
Structure Deformation

However, the stress state of material testing is different from that of the structure which is simulated innumerical simulations.
Mechanical property should be identified by the material testing which have the similar stress state to thestructure.
This paper proposes the method to select the appropriate loading conditions in material testing by
evaluating the stress state of the structure using stress analysis and tests the method.
In recent years, the importance of marine renewable energy is increasing. One of the wave power
generation systems has a mechanism for generating electricity by vertically moving a water surface in aKurisu Ueno

Motohiko

Experimental Study on Scale Effect cylinder called oscillating water column type wave power generator (OWC). It is said that the interaction ofMuraiof Oscillating Water Column

air volume, nozzle opening ratio and water surface change is important in OWC. However, we can notconfirm the influence of draft, amplitude, period, etc. on OWC. Therefore, in this research, we conducted
experiments using scales of different models to focus on the effect of scale.

Ryuki OTANI

Seiya UENO

Study on Navigation System forPlanetary LanderThis thesis discusses the navigation system for planetary lander. In this thesis, the attitude angle and altitudedetecting system, by using laser displacement sensor, is proposed. The effectiveness of proposed method isdemonstrated by numerical simulation results and experiment using multi-rotor aircraft.

In recent years, the demand of aircraft has increased. Therefore, we need to introduce new air traffic
management system that can respond to increase in demand. In this research, we aimed to calculate theAkihiro ONO

Takehiro
HIGUCHI

Study on Introduction ofoptimal trajectory that is considered of errors occurring during flight of aircraft. Especially when

Uncertainty in Trajectory

calculating the optimal trajectory, we examined how to get the same result as thinking about more points by

Optimization of Aircraft

thinking about some points. As a result, we could show how to determine the position of the representative
point evaluating errors. Furthermore, avoidance by changing the departure time of the aircraft was alsoexamined.
In this study, Communication network formation and position control law for multiple unmanned groundvehicles(UGVs) to monitor a moving target at base station is proposed. A monitoring image of the target

Hiroaki KATA

Seiya UENO

Study on control of tracking

that acquired by a nearby UGV is sent to base through the tracking network. Each UGV forms anetwork with multi unmanned

communication network and calculates own moving amount with virtual forces using only information invehicles using virtual forces

local area. In calculation of moving amount, two method were compared and examined. One is movementin virtual force direction and the other is movement using optimization method. Numerical simulations andexperiments show the effectiveness of this control law.
The abrasion pattern (AP) generated on the rubber surface is expected to be the product of flexible rubber

kaiKenKAWAGUCHI

NAKANO

Influence of dynamic
characteristics of contact part on
formation of abration patternand hard counterpart and dynamics at the contact part. Based on the hypothesis, we conducted a survey
focusing on the relaxation time determined from the dynamic characteristics using a testing machine
capable of measuring the dynamic characteristics (contact stiffness and contact damping) of the contact
part. As a result, we found the relationship between the pitches of APs of different sizes and the relaxation
time of the contact part, and created a flow of AP formation.
This paper is on polynomial guidance law for future lunar lander in powered descending phase. To achieve
pin-point landing, the guidance trajectory needs to be accurate. Polynomial guidance law is low calculation

ManamiKITAHARA

Seiya UENO

Study on Robust Polynomial

cost to recalculate trajectory but improvement is required for robustness of error. This paper proposedGuidance Law for Lunar Lander

optimal initial position method and approximate boundary condition method to thrust error in powereddescent phase. These methods improve robustness of polynomial guidance law on not only in the thrusterror but also in case of error in position, velocity and mass at the initial of powered descent phase.

For Concentrated polymer brushes (CPB) with excellent mechanical properties, it is known that durability
is improved by attaching grooves to the substrate. In this study, I estimated this factor by using finite
Iyori KUSANO

KenFinite Element Simulation of Point

element simulation of point contact problem between rigid ball and elastic plate. It is known that theNAKANO

Contact Problem

smaller the pitch of the groove the better the durability of CPB, but there was no clear difference in themodel used in this study. From this result, I think that the major factor is some conditions those were notconsidered in this research.
Recently, the number of space debris increase rapidly. So, we must take action to Active Debris Removal.

NaokiTakehiro

KUWAHARAHIGUCHI

Study on analysis and evaluation
method of approaching conditions
for space debris capture

One of the way of ADR is debris capture. In this study, the approach technique for debris capture close to
the target space debris is investigated. Finally, this study focus on optimal approaching time and optimal
initial relative position. It shows that the relative velocity of the satellite relative to the debris,approaching angle before the capture and required initial relative velocity are functions of the time fromdebris detection to capture. (90)The good tactile sensation at the time of makeup removal using cleansing oil is one of the added value ofNatsumi

Ken

KOYAMA

NAKANO

Objective measurement on thefeeling of using cleansing oil bymachine learning

cleansing oil and development of a cleansing oil with a feeling of use more preferred for humans isrequired. Therefore, in order to objectively evaluate the feeling of use of cleansing oil, a friction test wasconducted on four kinds of samples mixed with cleansing oil and makeup, and the feature amount extracted
from the time series signal was analyzed by clustering. As a result, it was found that the temporal change ofthe frictional force immediately after the start of sliding determines the difference between the samples.
This study discusses a method of motion estimation of a stalled aircraft based on image processing. For

Yuta SAITO

Takehiro
HIGUCHI

Study on Motion Estimation of a
Stalled Aircraft Based on ImageProcessing

estimating states in nonlinear systems such as attitude motion of an aircraft, the Unscented Kalman Filter(UKF) is used be-cause of high-accurate performance. By UKF and statistical distance (MaharanobisDistance), characteristic points detected from image processing are identified and motion estimation areperformed. Estimation by numerical simulation and experiment using a model aircraft was performed.
Estimation results seem acceptable. And the flight characteristics at stall were observed by this method.

In this study, the two-scale analysis method for ductile failure process is performed to explain themechanism of damage evolution inside carbon steel. It is well known that a ductile failure comes from
Sho SUZUKI

Kazumi

Multi-scale simulations for failure

phenomena such as nucleation, growth and coalescense of voids. In order to reproduce the growth behavior

MATSUI

process of carbon steelof voids, it is necessary to consider the behavior of the interface between ferrite and cementite, which is themain inclusion of carbon steel. We propose what kind of modeling is appropriate based on observation
image of voids, and carried out a simulation using that model.
Currently in Japan "SLIM" plan is promoted as the next exploration plan. In this study, we attempted toincrease the error absorption amount and the fuel margin in the vertical descending phase, and simulated theYuichi

Seiya

SUZUKIUENO

A Study on Maximum Horizontal

landing of the lunar probe using SLIM as a model. From this result, the ideal condition of orbit design was

Movement in the Vertical Descentexamined. As a result, the relationship between the trajectory design parameters, reachable distance andPhase of the Moon Lander

consumed fuel in the vertical descent phase was clarified. Moreover, from the obtained relation and theamount of propellant loading, it was possible to easily determine the trajectory design element that cansafely land.
Cells have mechanosensors that convert mechanical force into biochemical signaling. It is reported that one

Kota NAGAI

Toshihiko
SHIRAISHIA Study of a Mechanosensing
System of a Cultured Osteoblast
under Local Dynamic Stimulationof mechanosensors is focal adhesions. Their mechanisms are not be clarified, especially when dynamic
mechanical stimulation is applied. To make it clear, a magnetic micropillar substrate can be useful, whichenable the mechanical stimulation to be directly applied to each focal adhesion. In this study, I measured thecalcium response when local dynamic stimulation was applied and investigate a mechanosensing system ofan osteoblast under the stimulation.
Airplane accidents caused by stall are serious problem in these days. Training programs to recover fromFuminao

Takehiro

NAGASAKIHIGUCHI

Study on the Automatic Recovery

stall using small airplanes are provided by some companies. However, automatic recovery control system isControl from Stall Using Modelin the process of research and development. This study tests recovery from stall by RC model airplane inAirplane

the condition of simple nose up stall. Recovery is done by manual control or automatic control. In
conclusion, automatic recovery is achieved and that reduce the loos of altitude.

It has been reported that cells show adaptive response by sensing mechanical vibration. The mechanism ofA Study of Mechanical Vibration

it is not clear but this phenomenon can be applied to regenerative medicine for articular cartilage. In thisTomoaki

Toshihikoon Formation of Regenerative

study, chondrocytes from porcine articular cartilage were cultured under mechanical vibration without

NOZAWASHIRAISHI

Tissue Using Cultured

scaffolds. Vibration condition was set as a sinusoidal wave of 12.5, 25 or 50 Hz, 0.5 G. As a result, effects

Chondrocytesof mechanical vibration on cell proliferation were not shown. On the other hand, the average thickness ofchondrocyte cell sheets was increased by mechanical vibration at 12.5 Hz and 0.5 G.
In this study, a very small mass-spring system was constructed and its dynamic characteristic was studied.

Shohei

ShinDynamic Characteristics of aThe free vibration experiment was conducted to clarify its damping properties. As a result, it was revealed

HAMADAMORISHITA

Micro Mass-spring Systemthat the damping effect of internal friction increase with the volume of coil spring and that of air resistanceis too large to ignore in micro scale.

Takuya HIURAShin
MORISHITA

The Performance of Vibration
Monitoring System using SwarmIntelligence

The performance of the vibration monitoring system using swarm intelligence were investigated. Swarm
intelligence is the higher function or intelligence appeared in the network of agents. In this study, units
composed of a sensor and a actuator were placed on the target system. Each unit was connected to eachother to exchange information of displacement.
It is known that osteoblasts cultured under mechanical vibration increase their density. However, theTaichi

Shin

YAMAMOTOMORISHITA

The effect of medium sloshingcaused by mechanical vibration oncell proliferation

mechanism is not well known yet. To understand a part of the mechanism, the effect of medium sloshingcaused by mechanical vibration on osteoblasts proliferation was investigated experimentally. It is suggested
that the magnitude of shear flow caused by mechanical vibration is large enough to affect osteoblasts
proliferation. It is also shown that without sloshing, the effect of mechanical vibration on osteoblasts
proliferation is independent of the frequency in the range of 12.5 - 50 Hz.