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Research Subjects

A wide range of research activities, including basic studies of modern control theory to material sciences for the development of new electronic devices, are on-going at this department. In the following, these activities are summarized. Please refer to web pages provided by individual research sections for the details.

Control Systems Engineering
Instrumentation Systems Engineering
Electrical and Electronic Systems Engineering
Electronic Devices Engineering

Control Systems Engineering

The division of control systems engineering offers research and education relating to automated control technology, mechatronics technology, the analysis of vibration in mechanical systems and the mechanics of materials. Knowledge in these fields are required to construct an advanced mechanical system with a high level of reliability.
Subject Outline Faculty member (Research Section)
Intelligent control of mechatronics instruments Transfer and damping control are conducted using an omnidirectional wheeled robot and an active vibration reducer. A transfer object such as a liquid container is considered in this study. The purpose of this study is to transfer the objects without vibrations by controlling machines intelligently. Masafumi Hamaguchi (Robotics Laboratory)
Study on the optimum design of smart structures The calculations of displacement and stress distributions in structures and engineering materials subject to a prescribed load are required to design the structures and materials. Therefore, the numerical analysis of elastic and thermoelastic problems in various structures and materials as well as the optimum design of structures and configurations of materials has been studied. Fumihiro Ashida (Engineering Mechanics Laboratory)
Control Systems Design The laboratory aims to develop practical control systems design methods where input and state constraints are often considered. The research topics include:
  • Stabilizing control for an inverted pendulum with restricted travel
  • Vibration suppression control for a structure system using an active mass damper with restricted stroke
  • Transfer control of a crane with state constraints
Kazunobu Yoshida (Control Engineering Laboratory)
Static and dynamic design problems of machine elements and geared mechanical systems Mechanical design problems of machine elements, especially thin-rimmed gears for aeronautic use, strain wave gearing for astronautic use, pin gear reducers for industry robot use, planetary drive for wind turbine use. Applications of the finite element methods in contact strength, bending strength and dynamic behavior analyses of various kinds of gear devices and geared mechanical systems. Performance tests and simulations of various kinds of geared mechanical systems. Shuting Li (Machine Design Laboratory)
Mechanics of soft materials and flexible structures We are interested in the fundamental understanding of the mechanics of soft materials and flexible structures; elastomers, gels, filaments and films. We also offer the design principles for relevant applications ranging from micro-devices in flexible/stretchable electronics, sensors, and actuators to macro-structural contexts in vehicles and buildings. Takuya Morimoto (Engineering Mechanics Laboratory)
Design of fluid dynamic machines and vehicles Mainly using computational fluid dynamics, studies on complex flows including spray, turbulence, combustion are conducted for innovative design of machines and vehicles. Junji SHINJO(Thermo-Fluid Dynamics Laboratory)
Response Analysis of Vibratory System Subjected to Fluctuated Harmonic Excitation Many analyses of mechanical vibration, external force is assumed as pure harmonic excitation. But, there are occasionally fluctuations in amplitude, phase or frequency of the harmonic excitation. Our laboratory researches the difference of the responses caused by the fluctuation in the excitations. Shinji Tamura (Machinery Dynamics Laboratory)
System Analysis and Control The laboratory aims to develop analysis and synthesis of a nonlinear control system defined on manifold. The research topics include:
  • Global asymptotic stabilization by using a discontinuous feedback
  • Analysis and Design of a Lyapunov function and a control Lyapunov function.
  • Design of a stabilizing feedback by using evolutionary algorithms.
Takuyuki Tsuzuki (Control Engineering Laboratory)

Instrumentation Systems Engineering

While "communication" generally means that the exchange of information between human beings, "measurement" can be recognized as the communication between human and matter. In recent years, measurement technologies have been progressing rapidly by incorporating advanced information extraction and application technologies in addition to the conventional means of measurements. In our division, we are studying such measurement technologies on energy, mechanical vibration, micro-structure of magnetism and natural environment.

Subject Outline Faculty member (Research Section)
Assistive technology for people with brain function disorder Application of information technology for the rehabilitation or training of the people with disability such as higher brain dysfunction or developmental disorder is studied. Masahiko Nawate (Magnetic Instrumentation System Laboratory)
Research on the human interface Recently the opportunity of viewing the images on the small size electronic displays increases. Whether the information displayed on the screen is correctly transported when the screen size decreased? Effect of screen size on the information recognition is investigated. Masahiko Nawate (Magnetic Instrumentation System Laboratory)
Theoretical analysis of the spin structure of the nanosized magnetic materials The spin structure is analyzed via ab initio calculation. Nanosized structure such as wires, particles or dots are the target of the analysis. Masahiko Nawate (Magnetic Instrumentation System Laboratory)
Development of a novel optical measurement technique The aim of the laboratory is to develop the novel optical measurement techniques combining the interferometry and digital signal processing for the industrial applications. Recenlty, a 3D profilometer for diffusely reflecting objects and a paint drying monitor using digital holography have been investigated. Masayuki Yokota
Laser measurement and optical fiber measurement Based on originally proposed coherence regeneration method, we are developing ultra-long-range interferometric measurement for distinguishing minimal distance changes, as well as ultrafast measurement technique for fiber communication signals. We are also developing distributional fiber sensing technologies for detecting strain, temperature, and acoustic perturbation by using nonlinear effect in optical fibers. Fumihiko Ito
Study on impact-echo of wall tiles test Defective tiled walls are potentially hazardous to pedestrians walking around the building. It is necessary to detect tiles which are beginning to peel from the wall in preventive maintenance. Wall tiles test using Impact-echo technique is studied and a system which can detect peeling tiles automatically is developed. Hai Zhou (Computer Instrumentation)
Remote sensing of global environment Remote sensing technologies using electromagnetic waves are studied. In particular, emphasis is given to the utilization of microwaves that have features different from optical remote sensing. Major research subjects on-going include global scale rainfall measurements using spaceborne radars, and the use of combined microwave and optical sensors for the monitoring of coastal lagoon environment and for upper atmospheric sensing. Toyoshi Shimomai
(Remote Sensing Laboratory)

Electrical and Electronic Systems Engineering

The power electronics equipment represented for inverters and the advanced information equipment such as cellular phones and computers are essential in our daily life. The chair of Electrical and Electronic System Engineering is conducting advanced and creative researches and educations in the areas of power electronics, electric power control engineering, signal processing and communications.

Subject Outline Faculty member (Research Section)
Optical signal processing Development of design method for optical equalizers to compensate optical signal distortions due to various dispersions in optical transmission systems. Study of novel optical devices using photonic crystals which enable to minimize optical integrated circuits. Kaname Jinguji
Study on advanced communication systems We are studying advanced communication systems that realize broadband and ubiquitous information-communication services in the future. Especially, we are investigating the configurations and enabling technologies such as optical amplification for fiber-optic communication networks, which can yield potentially superior performance such as broad-bandwidth. Hiroji Masuda, Kokoro Kitamura
Image Engineering and its underlying Visual Perception The development and application in image engineering and its underlying visual perception are primary carried out. In the image media, mainly, we are conducting research and development of stereoscopic and three-dimensional display systems, involved their related input device. In addition, the study of visual perception, by psychophysical evaluation and bio-medical instrumentation, aim to elucidate the functions related to the design of the image media. Sumio Yano (Image Engineering Laboratory)
Development of signal processing methods for noninvasively measured human brain data We study signal processing methods for biomedical data. Especially, we develope data analysis methods for noninvasively measured human brain data such as electroencephalography(EEG), magnetoencephalography(MEG) and functional magnetic resonance imaging(fMRI). Our goal is to develope methods for removing noise or artifacts contaminating these measured data and for identifying where and when a brain activity of interest occurred. Wakako Nakamura

Electronic Device Technologies

Electronic devices are driving force for development of future technologies such as large scale integrated circuits (LSIs) and laser diodes indispensable to personal computers and optoelectronic communications. Our laboratories are dealing with various semiconductors and electronic devices, where novel LSIs, advanced materials, crystal growth, plasma technologies, electronic and optical properties and crystalline structures are vigorously investigated.

Subject Outline Faculty member (Research Section)
Advanced semiconductor structures for optical devices Development of new semiconductor materials and structures for advanced optical devices such as semiconductor lasers utilizing quantum effects in superlattices and quantum wells. Yasutomo Kajikawa (Quantum Electronics Laboratory)
Compound Semiconductor optoelectronic devices and nano materials for medical applications We are developing ZnO films, ZnO nanoparticles and devices for the applications of light emitting diodes for low cost solid state lighting and near-UV laser diodes. We also investigating nanomedicine such as low cost and nontoxic fluorescence probes using ZnO nanoparticles. Yasuhisa Fujita
Research of materials design for advanced electronic devices Electronic devices consist of various materials, such as semiconductors, metals and insulators. We investigate physical properties of combined materials based on computational physical methods such as the first-principles approach. We perform research of materials design for advanced electronic devices toward novel device concepts and principles. Hiroyuki Kageshima
Development of group IV element solar cells based on sputtering epitaxy We are studying about large area electronics such as solar cells andthin-film transistors. In such a large area electronics low fabrication cost and environmentally friendly fabrication process are demanded, since area to be fabricated is expanding extraordinarily. In our laboratory, we propose environmentally friendly sputtering deposition process to fabricate group IV element solar cells with a new device structure. Yeh Wenchang
Advanced semiconductor devices based on surface-/interface-control This laboratory's goal is to develop the advanced silicon and/or compound semiconductor devices with new conception based on investigating and applying the surface/interface characteristics. New memory devices utilizing the carrier capturing at MOS interface states, and high mobility transistors with compound semiconductor channel gown on Si-platform, are now in progress. Toshiyuki Yoshida