Kazuhisa Chiba

Kazuhisa Chiba
The University of Electro-Communications | UEC · Graduate School of Informatics and Engineering

Ph.D.(Eng.)
Aerospace Engineering, Aerodynamics, Design Informatics, Optimization, Data Analysis, Visualization

About

127
Publications
14,072
Reads
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1,367
Citations
Additional affiliations
April 2009 - March 2015
Hokkaido University of Science
Position
  • Professor (Associate)
April 2005 - March 2008
Japan Aerospace Exploration Agency
Position
  • Project Researcher
Education
April 1996 - March 2005
Tohoku University
Field of study
  • Aerospace Engineering

Publications

Publications (127)
Conference Paper
Full-text available
This study has investigated whether adding yaw-wise rotation to an aircraft flap improves lift performance and elucidated its improvement mechanism. The aircraft is optimized for cruising conditions and lacks takeoff and landing performance. Hence, high-lift devices, such as slats and flaps, compensate for the lift performance. Since flaps move alo...
Article
Full-text available
This study conducted wind tunnel tests with consecutive deflection angle changes on a three-dimensional (3D) wing with a control surface to procure aerodynamic data by sweeping the deflection angle. Configuration changes of a wind tunnel test model, such as changing the deflection angle of control surfaces, are usually performed manually with the v...
Article
Full-text available
This study has constructed a fully automated multidisciplinary and many-objective evolutionary design optimization system independent of computer environments to evaluate objective functions; the research applied it to a geometric design problem of a flyback booster for next-generation space transportation. In optimization involving objective funct...
Chapter
The study aims to create pragmatic geometries of flyback booster on reusable launch systems with a high degree of freedom efficiently by evolutionary computations and to present its design candidates based on physics. This article performed a second optimal design that we sophisticated the first trial on many-objective multidisciplinary evolutionar...
Article
This study has attained three two-objective optimum designs of constellation orbit with three satellites specialized for regional coverage observation on the Earth’s ground. Space transportation is becoming more frequent and less expensive due to actively participating by numerous venture companies. Besides, improvements in manufacturing technology...
Article
This study investigated whether adding yaw-wise rotation to an aircraft flap improves lift. The aircraft is optimized for cruising conditions and lacks takeoff and landing performance. Hence, high-lift devices, such as flaps, are used to compensate for the lift performance. Since flaps are devices that move along rails, the gap between the wing and...
Article
In this paper, we introduce a novel design-informatics approach to extract and visualize human experts’ knowledge about airplane design. Using the dataset of candidate designs for Silent Super-Sonic Technology Demonstrator (S3TD) developed by Japan Aerospace Exploration Agency (JAXA), we try to extract and visualize the expert’s chosen design among...
Article
The transonic buffet is a phenomenon of aerodynamic instability due to the oscillation of a shock wave; its generating mechanism has not been fully solved. This paper introduces an analysis of the transonic buffet with an Evolutionary Rule-based Learning (ERL) approach. ERL can extract generalized knowledge as a set of rules while solving a given m...
Article
Full-text available
This study scrutinized the aerodynamic change of adding a yaw-wise rotational degree of freedom to a single slotted flap of airplane via computational fluid dynamic analyses. Existing slotted flaps have spanwise constant gaps and are disharmonious with the 3D nature of the flow field. A flap geometry and its angle condition are sensitive to aerodyn...
Chapter
This study performed data mining for nondominated-solution datasets of flyback-booster geometry for next-generation space transportation procured by evolutionary computation. We prepared two datasets of nondominated solutions due to two problem definitions, which differ merely in the definition of some design variables based on a design hypothesis...
Article
Full-text available
We have developed a remote and precise feedback control system using optical measurement technology to alter the angle of a flap, which is part of a wind tunnel test model, automatically and to earn the aerodynamic data efficiently. To rectify the wasteful circumstance that Japan Aerospace Exploration Agency (JAXA)’s low-turbulence wind tunnel stop...
Conference Paper
Full-text available
We have fulfilled a completely automated system of evolutionary design optimization with unstructured computational fluid dynamics. Until now, we cannot automatize aerodynamic design optimization to deal with geometry with high degrees of freedom. However, we achieved to simply iterate large-scale (it takes huge time to evaluate objective functions...
Chapter
The conceptual design of a multi-stage launch vehicle (LV) using a clustered hybrid rocket engine (HRE) is carried out through multi-disciplinary design optimization. This LV designed in this study can deliver micro-satellites to sunsynchronous orbits (SSO). The optimum size of each component, such as an oxidizer tank containing liquid oxidizer, a...
Chapter
The stratum-type association analysis as a new data mining technique has been applied to the conceptual design of a single-stage launch vehicle with hybrid rocket engine. The conceptual design was performed by using design informatics, which has three points of view, i.e., problem definition, optimization, and data mining. The primary objective of...
Article
We have implemented the design optimization of the three-dimensional geometry for a two-stage-to-orbit flyback booster under six objective functions regarding aerodynamics, aerodynamic heating, and structures to obtain the knowledge for designing reusable launch vehicle. It is important to view the relationship among the objective functions of othe...
Article
Fulfillment of reusable launch vehicle is essential as it is one of economic and efficient space transportation methods. In this research, the geometry optimization of TSTO flyback booster was performed based on the optimal trajectory result of WIRES of Kyushu Institute of Technology for three objectives: aerodynamics, aerodynamic heating, and stru...
Article
This study aims at revealing the effect of the simple control of oxidizer flux on a hybrid rocket engine for an efficient extinction–reignition sequence to extend the downrange as well as the duration in the lower thermosphere. The data mining result in the prior study achieved a hypothesis that the thrust control between 1st and 2nd combustions sp...
Article
The goal of this study was to investigate the influence of aerodynamic factors on the static behavior of a tethered high-altitude lighter-than-air platform. The system design comprised a lighter-than-air vehicle and a tether cable, and the conceptual platform configuration of such a system is studied herein. Governing equations were derived to mode...
Article
A multidisciplinary design methodology for a launch vehicle (LV) with a hybrid rocket was proposed in order to obtain qualitative design knowledge. In this study, a propulsion system performance and aerodynamic performance were empirically evaluated using a theoretical approach, and flight evaluation was performed by solving equations of motion to...
Article
Full-text available
This paper aims at generating as well as extracting design strategies for a real world problem using an evolutionary learning classifier system. Data mining for a design optimization result as a virtual database specifies design information and discovers latent design knowledge. It is essential for decision making in real world problems. Although w...
Chapter
The demand for the economic and dedicated space launchers for vast amount of lightweight, so-called nano-/microsatellites, is now growing rapidly. There is a strong rationale for the usage of the hybrid propulsion for economic space launch as suggested by the assessment conducted here. A typical concept of development of such an economic three-stag...
Article
The transonic buffet degrades the aerodynamic performance of the aircraft during cruise. It is a phenomenon that should be avoided absolutely as it may lead to accidents. However, the mechanism of occurrence has yet to be elucidated. To understand this phenomenon, large-scale unsteady data is accumulated using computational fluid dynamics. In contr...
Chapter
Efficient global optimization (EGO), based on the expected improvement maximization of the Kriging model, is a suitable optimization method for designs based on time-consuming evaluations such as computational fluid dynamics. However, the original formulation of EGO can find only one additional sample point after an initial sample point is acquired...
Chapter
This paper aims to reveal design strategies of a sounding hybrid rocket to efficiently perform extinction-reignition. On previous studies, we have derived design candidates which each is a solution optimized on a design optimization problem for the sounding hybrid rocket. To extract design strategies from the design candidates, this paper applies a...
Article
This paper describes the development of a geometric correction system for the inclination on multi-spectral image taken by small-type unmanned aerial vehicle. The matrix in geometric-correction was derived by using the coordinates at three points on multi-spectral image and those at identical three positions on correspondent map data. As a result,...
Article
Full-text available
Conceptual design of a launch vehicle with a hybrid rocket engine (HRE) has been implemented using design informatics approach in order to investigate the feasibility of a single-stage hybrid rocket. Two test design problems were formulated by using two objective functions: maximization of downrange and minimization of initial gross weight, seven d...
Conference Paper
Full-text available
A station-keeping platform in the stratosphere can be a novel foothold toward spaceactivities. If the platform is conformed as free-ight LTA vehicles, there are possibilitiesthat they may be blown away by the atmospheric advection due to its free-ight nature.Therefore, mooring this type of platform to the ground by a cable will be much easierto hol...
Article
Full-text available
The existence of a platform at the stratosphere is expected to be the role to gain a foothold in space. When the platform is employed airship in, it is transported by advection due to its light-weight body. Thereupon, a mooring of platform is reasonable in order to incarnate fixed-point platform. Conception of a captive platform system is similar t...
Article
Full-text available
In this study, a multi-objective genetic algorithm (MOGA) was applied to the multidisciplinary design optimization (MDO) of a hybrid rocket. A swirling-oxidizer-type hybrid rocket engine (HRE) with a single cylindrical grain port was designed. It was considered that this HRE could temporarily stop combustion via oxidizer throttling; this feature is...
Article
Full-text available
This paper deals with the application of data mining techniques to the conceptual design knowledge for a LV (launch vehicle) with a HRE (hybrid rocket engine). This LV is a concept of the space transportation, which can deliver micro-satellite to the SSO (sun-synchronous orbit). To design the higher performance LV with HRE, the optimum size of each...
Conference Paper
Full-text available
The existence of a platform at the stratosphere is expected to be the role to gain a foothold in space. When the platform is employed airship in, it is transported by advection due to its lighter-than-air body. Thereupon, a mooring of platform is reasonable in order to incarnate _xed-point platform. Conception of a captive platform system is simila...
Article
We have developed a small size,lightweight 4 bands multi-spectral camera for micro-satellites, nano-satellites and cube-sats and soon. This spectral camera can select several wavelengths required by earth observation experiments, by exchanging the optimum bandpass filter.
Conference Paper
Full-text available
A single-stage launch vehicle with hybrid rocket engine has been conceptually designed by using design informatics, which has three points of view, i.e., problem definition, optimization, and data mining. The primary objective of the present design is that the down range and the duration time in the lower thermosphere are sufficiently secured for t...
Article
Full-text available
A single-stage launch vehicle with hybrid rocket engine, which uses solid fuel and liquid oxidizer, has been studied and developed as a next-generation rocket for scientific observation due to the advantages as low cost, safety, re-ignition, and reduced pollution. Thereupon, the knowledge regarding hybrid rocket system has been gained through the f...
Conference Paper
Full-text available
Precision agriculture has been being implemented in order to environmentally friendly and efficiently product and manage crops. The remote sensing by satellite and aircraft is employed in order to obtain the information regarding the growth of crops. Although the data from satellites can include wide-range image each time, it is insufficient due to...
Article
A single-stage launch vehicle with hybrid rocket engine, which uses solid fuel and liquid oxidizer, has been being studied and developed as a next-generation rocket for scientific observation due to the advantages as low cost, safety, re-ignition, and reduced pollution. Therefore, the knowledge regarding hybrid rocket system has been being gained t...
Conference Paper
Precision agriculture has been being implemented in order environmentally friendly and efficiently to product and manage crops. The remote sensing by satellite and aircraft is employed in order to obtain the information regarding the growth of crops. Although the data from satellites can include wide-range image each time, it is insufficient due to...
Article
A single-stage launch vehicle with hybrid rocket engine has been conceptually designed by using design informatics, which has three points of view as problem definition, optimization, data mining. The primary objective of the present design is that the sufficient down range and also duration time in the lower thermosphere are achieved for the auror...
Conference Paper
A single-stage launch vehicle with hybrid rocket engine has been conceptually designed by using design informatics, which has three points of view, i.e., problem definition, optimization, and data mining. The primary objective of the present design is that the down range and the duration time in the lower thermosphere are sufficiently obtained for...
Article
Full-text available
A single-stage launch vehicle with hybrid rocket engine has been conceptually designed by using design informatics, which has three points of view as problem definition, optimization, and data mining. The primary objective of the design in the present study is that the sufficient down range and duration time in the lower thermosphere are achieved f...
Conference Paper
A single-stage hybrid rocket is necessary in order to efficiently perform the scientific observations and experiments. The primary objective of the present conceptual design is that the sufficient downrange and duration time in the low thermosphere is obtained in order to efficiently observe aurora, which is one of the recent topics in the scientif...
Article
Full-text available
Design informatics, which is the efficient design methodology, has three points of view. The first is the efficient exploration in design space using evolutionary-based optimization methods. The second is the structuring and visualizing of design space using data mining techniques. The third is the application to practical problems. In the present...
Conference Paper
Design Informatics has three points of view. First point is the efficient exploration in design space using evolutionary computation. Second point is the structurization and visualization of design space using data mining. Third point is the application to practical problems. In the present study, the influence of the seven pure and hybrid optimize...
Article
Full-text available
Design Informatics has three points of view. First point is the efficient exploration in design space using evolutionary computation. Second point is the structuring and visualizing of design space using data mining. Third point is the application to practical problems. The investigation of efficient evolutionary-based optimizer for the above first...
Conference Paper
Optimizer is an essence in design-informatics to efficiently obtain nondominated solutions. In the present study, the best optimizer is decided through the competition for the mathematical standard test functions and is also applied to a conceptual design problem of simple single-stage hybrid rocket as the real-world problem. Consequently, a hybrid...
Article
Full-text available
The design-inf ormatics approach has been suggested for the efficient design. In the present study, this approach was applied to the design for the intimate configuration of the silent supersonic technology demonstrator. The design-informatics approach has two steps such as optimization and data mining. As a present first step, multidisciplinary de...
Conference Paper
Design-Informatics has three points of view. One of these points is the investigation of efficient optimization to generate hypothetical database for a large-scale design problem. the results of the present study indicates the hybrid method between differential evolution and genetic algorithm is better performance for efficient exploration in desig...
Article
Optimizer is an essence in design-informatics to efficiently obtain nondominated solutions. In the present study, the best optimizer decided after the competition for the standard test problems is applied to a conceptual design of hybrid rocket as the real-world problem. The objective of this study is to confirm the effect for the generation manner...