Search Results 1-20 of 639

  • Precise Ego-motion Measurement by High Speed Camera  [in Japanese]

    Cho Hyeongsung , Nishiuchi Hidekazu , Satoh Hiroshi , Nishioka Shinich , Sakai Hiroyuki , Matsuo Haruo

    本研究では,カメラで高速域まで正確に自車両挙動を計測できる手法を提案する.従来,車速が高くなると近傍物体や路面追跡が難しく,距離精度の低い遠方物体を主に使用するため,計測精度が低下する課題があった.我々は,画像を300枚/秒で撮影可能な高速カメラを用い本課題を解決し,公道走行にて効果を確認した.

    Transactions of Society of Automotive Engineers of Japan 51(3), 491-496, 2020

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  • A study of relationship on occlusion and walking - Three-dimension analysis on walking about geriatrics wearing removable denture -  [in Japanese]

    山本 寛明 , 渡邊 諒 , 廣田 翔 , 山本 英弘 , 岩堀 正俊 , 都尾 元宣

    近年、口腔機能と全身運動の関連が重要視されている。特に咬合状態の変化は身体機能に影響することがいわれており、姿勢制御機構や身体平衡機能にも関与することが研究されている。本研究では、義歯を使用している高齢者に対して、三次元運動解析システムを用いることで咬合状態の変化が身体運動機能にどのような影響を与えるかを検討した。9 名の本学学生・職員(対照群)と、9名の義歯を使用している高齢者(実験群)を対象に …

    岐阜歯科学会雑誌 = The Journal of Gifu Dental Society 46(1), 1-8, 2019-06

    IR 

  • Development and evaluation of a jaw-tracking system for mice: reconstruction of three-dimensional movement trajectories on an arbitrary point on the mandible

    Moriuchi Emi , Hamanaka Ryo , Koga Yoshiyuki , Fujishita Ayumi , Yoshimi Tomoko , Yasuda Go , Kohara Haruka , Yoshida Noriaki

    … The demand for devices for evaluating stomatognathic function, for instance, recording mandibular movements or masticatory muscle activities using animal models, has been increasing in recent years to elucidate neuromuscular control mechanisms of mastication and to investigate the etiology of oral motor disorders. … Methods: First, jaw movements with six degrees of freedom were measured using a motion capture system comprising two high-speed cameras and four reflective markers. …

    BioMedical Engineering OnLine 18(1), 59, 2019-05-16

    IR 

  • Study on Model Predictive Control for Robustness in Flyby mission of DESTINY+  [in Japanese]

    Cho Sungmin , Otsuki Masatsugu , Kubota Takashi

    … A flyby mission requires a robust control for constraints in traversing at high-speed. … This paper proposes a control scheme based on Model predictive Control for a flyby mission with robustness for constraints of input and angular velocity. … The simulation study shows that Model predictive Control is effective for robustness in a flyby mission. …

    The Proceedings of the Symposium on the Motion and Vibration Control 2019.16(0), A106, 2019

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  • Study on Trajectory Planning and Motion Control of Low-Speed Autonomous Vehicle Considering Existence of Rearward Traffic  [in Japanese]

    NEMOTO Natsuki , FUJINAMI Yohei , ARITA Shunsaku , RAKSINCHAROENSAK Pongsathorn

    … <p>In recent years, mobility supported by low-speed autonomous driving service has been considered for vulnerable road users. … However, driving at low speed region might have problem in disturbing normal traffic flow when such vehicles appear in public roads and consequently the social acceptance of such mobility service is not high. …

    The Proceedings of the Dynamics & Design Conference 2019(0), 516, 2019

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  • Tracking of Piston Movement Using Large Mirrors for Piston drive Analysis  [in Japanese]

    YAMATO Kazuki , ABE Ryota , OKU Hiromasa

    … <p>In our study, a piston movement was tracked by controlling the gaze direction of the two mirrors in order to observe the piston that moves at high speed during driving of the engine. … Since the piston motion is considered to be a sine curve, a mirror control signal of a sine curve was created using the function generator. … In this experiment, the gaze direction of the mirrors was controlled according to the trigger signal from the engine under the condition that the engine speed was known. …

    The Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec) 2019(0), 2P1-I09, 2019

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  • Remote Person Authentication using a Super-telephoto Video Tracking System  [in Japanese]

    ADACHI Hiroki , INOKUCHI Mitsuhiro , SHIMASAKI Kohei , JIANG Mingjun , TAKAKI Takeshi , ISHII Idaku

    … = 1600 mm lens on a super-telephoto tracking system, which can control a mirror-drive pan-tilt system with high-speed visual feedback. … Experimental results show the effectiveness of supertelephoto tracking in remote authentication for very distant persons in real scenarios.</p> …

    The Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec) 2019(0), 2P1-I08, 2019

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  • High-speed raster scanning method of galvanometer mirror using pulse input based on PID control:-for the compensated imaging of motion blur by high-speed transition-  [in Japanese]

    HAYAKAWA Tomohiko , KAMO Keigo , KUBOTA Yuki , MOKO Yushi , SENOO Taku , ISHIKAWA Masatoshi

    … <p>PID control decreases gain of high-accelerated input signal against actual signal of actuators due to inertia of its weight. … Particularly, in tracking application of galvanometer mirror, its gain decrease causes motion blur as the target speed does not correspond with tracking speed. … While in this research we realize to generate high linearity waveform using pulse input into the PID control box. …

    The Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec) 2019(0), 1P2-L05, 2019

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  • Study on Autonomous Boat-Type Robot for Automatic Measurements of Velocity and Discharge in Natural Rivers - Field Performance Test in Small/Middle Scale Straight Rivers -  [in Japanese]

    SANJOU Michio , ISOBE Shunsuke , SHIGETA Asuka , OKAMOTO Takaaki , TODA Keiichi

    本論文では自律制御ボート型ロボットの実河川における性能特性を検証する。本システムではボートロボットの位置をカメラの自動追跡装置でリアルタイムに検知し,PID制御によって ロボットを流水中で自律的に静止させる。静止に必要な推進力より対向流速を評価する点が本システムの特長である。ここでは中小河川における野外テストを実施して,電磁流速計の計測値を用いて,ロボットによる自動流速計測法の精度検証を定量的に行 …

    Journal of Japan Society for Natural Disaster Science 38(1), 87-97, 2019

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  • Discrete Adaptive Control with Multiple-Step-Guess Estimation for Brushless DC Motor

    Shao Guirong , Zhu Minling , Ma Hongbin , Zhang Xinghong

    … <p>The brushless DC motor (BLDCM) speed control system has various kinds of uncertainties, such as reference speed mutation, noise and parameters change, etc. … However, proportional integral (PI) control method used widely cannot handle the uncertainties in the control system well. …

    Journal of Advanced Computational Intelligence and Intelligent Informatics 23(5), 810-822, 2019

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  • ABS Conversion of Phase Variable Type PGC Applied to Active Magnetic Bearings  [in Japanese]

    SAITO Daishi , WAKUI Shinji

    … <p>The Peak-of Gain Control (PGC) and Auto-Balancing System (ABS) are applied as unbalanced vibration compensation for active magnetic bearings. … The PGC applied when passing through the critical speed of the rotor increases bearing stiffness and positively suppresses vibration amplitude of the rotor. … On the other hand, ABS is applied at a rotation speed exceeding the critical speed and the amplitude of the rotor becomes small. …

    Journal of the Japan Society for Precision Engineering 85(8), 727-732, 2019

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  • Study on Virtual Synchronous Generator Control of PMSG Wind Generator with MPPT Control  [in Japanese]

    Imai Hidetaka , Orihara Dai , Iioka Daisuke , Saitoh Hiroumi

    … To solve the problem, the authors have studied Virtual Synchronous Generator (VSG) control by PMSG wind generator without battery energy storage. … Since the system does not have a battery, kinetic energy of PMSG is used to absorb impact of system fault and rotating speed of PMSG is changed from optimal point. … This paper proposes a novel VSG control including a function that recovers rotating speed of PMSG to optimal point. …

    IEEJ Transactions on Power and Energy 139(8), 505-512, 2019

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  • Evaluation of Influence of Delay of Image Information on Steering Maneuver in Remotely Controllable Automated Driving System  [in Japanese]

    Mizushima Kazuhisa , Kamikura Takahisa , Omae Manabu

    遠隔地からの監視・操作者のもとで運用される遠隔型自動運転において、カメラ映像の遅延が運転に与える影響を評価した。本研究では、様々な遅延量による遠隔操作を可能とするため遠隔操作シミュレータを構築し、評価を行った。遅延存在下の車線追従操作を評価することで、低速運転における許容できる遅延量を明らかにした。

    Transactions of Society of Automotive Engineers of Japan 50(3), 970-976, 2019

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  • Design of a Framework for Sport Data Analysis Using GNSS

    NAKAJIMA Madoka , OTA Chihiro , KOHTAKE Naohiko

    … For such teams, distance, speed, sprinting speed, acceleration, and deceleration are analyzed using GNSS data, and the results are used for training. … In addition, through combining GNSS data, heart rate, and vital and conditional data, the coaches can control the strength of the training and prevent injuries to the players. … Furthermore, tracking data can be used together with video, and play style and play areas can mostly be confirmed in game scenarios. …

    Journal of Japan Society of Sports Industry 29(2), 2_109-2_124, 2019

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  • High-speed Scanner with Nanometer Resolution Using a Hybrid Reluctance Force Actuator

    Ito Shingo , Troppmair Stefan , Cigarini Francesco , Schitter Georg

    … <p>This paper proposes a high-precision, high-speed scanner using a hybrid reluctance actuator, which can be stronger than conventionally used comparable Lorentz force actuators. … To reject disturbances such as thermal drift and hysteresis, the scanner is regulated by cascade control, for which parasitic resonances are damped partially mechanically. … As a result, the closed-loop system realizes a high control bandwidth of 3.5kHz and a high positioning resolution of 0.8nm at a static point. …

    IEEJ Journal of Industry Applications 8(2), 170-176, 2019

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  • Dynamic Intelligent Systems Based on High-Speed Vision

    Senoo Taku , Ishikawa Masatoshi , Yamakawa Yuji , Huang Shouren , Koyama Keisuke , Shimojo Makoto , Watanabe Yoshihiro , Miyashita Leo , Hirano Masahiro , Sueishi Tomohiro

    … <p>This paper presents an overview of the high-speed vision system that the authors have been developing, and its applications. … First, examples of high-speed vision are presented, and image-related technologies are described. … Next, we describe the use of vision systems to track flying objects at sonic speed. … Finally, we present high-speed robotic systems that use high-speed vision for robotic control. …

    Journal of Robotics and Mechatronics 31(1), 45-56, 2019

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  • Artificial Bee Colony Algorithm Based on Adaptive Local Information Sharing Meets Multiple Dynamic Environments

    TAKANO Ryo , SATO Hiroyuki , TAKADAMA Keiki

    … ABC-alis is applied to various types of dynamic changes embedded in DOPs to verify its tracking ability in such dynamic environments. … (E) a random speed change of local optima in the environment (D); … (2) from environments C, D, and E, ABC-alis can adapt to the random change of local optima from the viewpoint of the evaluation value, coordinates, speed, and all of them; …

    SICE Journal of Control, Measurement, and System Integration 12(1), 1-10, 2019

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  • Ellipse Self-window Method for High-speed High-resolution Optical Tracking of Medaka  [in Japanese]

    末石 智大 , 小川 拓也 , 谷内田 尚司 , 渡辺 義浩 , 石川 正俊

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 117(514), 213-218, 2018-03-18

  • Ellipse Self-window Method for High-speed High-resolution Optical Tracking of Medaka  [in Japanese]

    末石 智大 , 小川 拓也 , 谷内田 尚司 , 渡辺 義浩 , 石川 正俊

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 117(513), 213-218, 2018-03-18

  • 6. Dynamic Projection Mapping  [in Japanese]

    Watanabe Yoshihiro , Sueishi Tomohiro , Ishikawa Masatoshi

    The Journal of The Institute of Image Information and Television Engineers 72(5), 332-335, 2018

    J-STAGE 

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