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196 results on '"Kojiro Iizuka"'

154. 1C24 Collision-free Guidance Control of Multiple UAVs with Restricted Communication Networks(The 12th International Conference on Motion and Vibration Control)

Author

Satoshi Suzuki, Kojiro Iizuka, Yoshihiko Aida, Takashi Kawamura, Yohei Fujisawa, and Yuichi Ikeda

Subjects
Engineering, business.industry, Control theory, Collision free, Vibration control, Guidance control, business, Telecommunications network, Motion (physics), Simulation, Collision avoidance
Published
2014
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157. Development of Grousers with a Tactile Sensor for Wheels of Lunar Exploration Rovers to Measure Sinkage

Author

Mitsuhiro Yamano, Takashi Kubota, Tatsuya Sasaki, and Kojiro Iizuka

Subjects
Loose Soil, Computer science, lcsh:Electronics, Measure (physics), lcsh:TK7800-8360, Thrust, Kinematics, Tactile Sensor, Regolith, Grouser, lcsh:QA75.5-76.95, Computer Science Applications, Artificial Intelligence, Lunar Exploration Rovers, lcsh:Electronic computers. Computer science, Software, Strain gauge, Tactile sensor, Strain Gauge, Marine engineering
Abstract

This paper presents a grouser developed for the wheels of lunar exploration rovers to measure sinkage. The wheels, which are intended to traverse loose soil such as lunar regolith, contain grousers that transfer thrust to the wheels and thus to the body of the rover. The interaction between the wheel (with grousers) and the loose soil can be described using a kinematic model. When traversing loose soil, the wheel sinks into the soil, which necessitates knowledge of the entrance angle needed in order to avoid this problem. If the entrance angle is known, the sinkage can be measured in real time before adverse conditions occur. Because of the importance and usefulness of detecting the entrance angle of the wheel, we herein propose a grouser with an embedded tactile sensor. A strain gauge on the surface of the grousers serves as the tactile sensor. In order to confirm the precision of the proposed grouser, we have performed tests on a rigid surface and loose soil surfaces., Article, INTERNATIONAL JOURNAL OF ADVANCED ROBOTIC SYSTEMS. 11:49 (2014)

Published
2014
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160. 3C12 Motion Analysis of the Root-Cutting Blade for an Automatic Spinach Harvester(The 12th International Conference on Motion and Vibration Control)

Author

Takashi Tsuchiya, Yuta Nakamura, Takamitsu Hatakeyama, Akihiro Fujisawa, Tatsuya Yamaguchi, Kosuke Hirano, Susumu Kitazawa, Yuichi Chida, and Kojiro Iizuka

Subjects
Motion analysis, Engineering, Blade (geometry), business.industry, Root (chord), Vibration control, Mechanical engineering, Structural engineering, business, Motion (physics), Discrete element method
Published
2014
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165. Autonomous Navigation, Guidance and Control of Small Electric Helicopter

Author

Kojiro Iizuka, Takashi Kawamura, Takahiro Ishii, Nobuya Okada, and Satoshi Suzuki

Subjects
Small Helicopter, Guidance, navigation and control, Payload, Computer science, lcsh:Electronics, lcsh:TK7800-8360, Navigation system, ComputerApplications_COMPUTERSINOTHERSYSTEMS, Kinematics, Optimal control, Autonomous control, Low Accuracy Sensors, lcsh:QA75.5-76.95, Computer Science Applications, Artificial Intelligence, Composite Navigation System, Control system, Three-Dimensional Guidance System, lcsh:Electronic computers. Computer science, Quaternion, Guidance system, Software, Simulation
Abstract

In this study, we design an autonomous navigation, guidance and control system for a small electric helicopter. Only small, light-weight, and inaccurate sensors can be used for the control of small helicopters because of the payload limitation. To overcome the problem of inaccurate sensors, a composite navigation system is designed. The designed navigation system enables us to precisely obtain the position and velocity of the helicopter. A guidance and control system is designed for stabilizing the helicopter at an arbitrary point in three-dimensional space. In particular, a novel and simple guidance system is designed using the combination of optimal control theory and quaternion kinematics. The designs of the study are validated experimentally, and the experimental results verify the efficiency of our navigation, guidance and control system for a small electric helicopter., Article, INTERNATIONAL JOURNAL OF ADVANCED ROBOTIC SYSTEMS. 10:54 (2013)

Published
2013
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167. 302 Study on the curling robot will match with human

Author

Ryosuke Kamimura, Satoshi Suzuki, Yuta Tanikawa, Ryosuke Shimura, Satoshi Miyasaka, Kojiro Iizuka, Takashi Kawamura, and Syota Tanaka

Subjects
Computer science, business.industry, Robot, Computer vision, Artificial intelligence, business, Curling
Published
2013
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