Prof. Kentaro Takagi Profile

Prof. Kentaro Takagi

Professor at Toyohashi Univ of Technology

SPIE Involvement:

Conference Program Committee | Author

Publications (32)

Proceedings Article | 9 May 2024 Poster + Paper

Accelerating electro-ionic soft actuators by feedforward control and the performance degradation by voltage limits

Junya Nakada, Mousumi Garai, Toshiki Hiruta, Il-Kwon Oh, Kentaro Takagi

Proceedings Volume 12948, 129480M (2024) https://doi.org/10.1117/12.3010552

KEYWORDS: Actuators, Polymeric actuators, Polymers, Electrical conductivity, Liquids, Ionic polymer metal composites, Pulse signals, Numerical simulations, Electrodes, Automatic control

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Proceedings Article | 9 May 2024 Presentation + Paper

On the time response properties predicted from the exact transfer function of a multiphysics model of IPMC sensors

Kosetsu Ishikawa, Zicai Zhu, Kinji Asaka, Toshiki Hiruta, Kentaro Takagi

Proceedings Volume 12945, 129450F (2024) https://doi.org/10.1117/12.3010269

KEYWORDS: Ionic polymer metal composites, Sensors, Molecules, Matrices, Polymers, Partial differential equations, Deformation, Solids, Protactinium, Electrodes

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Proceedings Article | 9 May 2024 Poster + Paper

Dielectric elastomer actuator with electro adhesion for a vibration excitation of a conductive structure

Toshiki Hiruta, Junya Ohno, Kentaro Takagi

Proceedings Volume 12945, 129450W (2024) https://doi.org/10.1117/12.3010542

KEYWORDS: Dielectric elastomer actuators, Vibration, Adhesion, Electrodes, Pipes, Adhesives, Aluminum, Laser Doppler velocimetry

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Proceedings Article | 28 April 2023 Presentation + Paper

A method of testing pear fruit firmness with dielectric elastomer actuator excitation

Toshiki Hiruta, Kaishi Sasaki, Naoki Hosoya, Shingo Maeda, Kentaro Takagi, Itsuro Kajiwara

Proceedings Volume 12482, 1248206 (2023) https://doi.org/10.1117/12.2657681

KEYWORDS: Dielectric elastomer actuators, Vibration, Electrodes, Elasticity, Nondestructive evaluation, Spectrum analysis, Laser Doppler velocimetry, Modal analysis, Agriculture

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Proceedings Article | 20 April 2022 Presentation + Paper

The origin of contraction of twisted polymer fiber muscles: whether the cause is entropic elasticity or thermal expansion

Daisuke Kimura, Toshihira Irisawa, Kentaro Takagi, Kenji Tahara, Daichi Sakurai, Haruhiko Watanabe, Wataru Takarada, Masatoshi Shioya

Proceedings Volume 12042, 120420P (2022) https://doi.org/10.1117/12.2612843

KEYWORDS: Polymers, Actuators, Crystals, Polymeric actuators, X-rays, X-ray imaging, Scattering

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Proceedings Article | 18 April 2022 Presentation + Paper

On integral resonant vibration control and the negative direct feedthrough term of a piezoelectric bimorph beam

Ryugo Taira, Tsuyoshi Inoue, Tetsuya Iwasaki, Kentaro Takagi

Proceedings Volume 12045, 120450D (2022) https://doi.org/10.1117/12.2612755

KEYWORDS: Actuators, Sensors, Vibration control, Ceramics, Capacitance, Digital signal processing, Resistance, Control systems, Piezoelectric effects, Positive feedback

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Proceedings Article | 22 March 2021 Poster + Presentation + Paper

A study on shunt damping performance, current servo response, and energy harvesting analysis for voice coil motors

Kazuya Hirasawa, Kentaro Takagi, Tsuyoshi Inoue

Proceedings Volume 11590, 115900Z (2021) https://doi.org/10.1117/12.2584354

KEYWORDS: Electromagnetism, Servomechanisms, Energy harvesting, Vibration control, Transducers, Sensors, Device simulation, Amplifiers

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Proceedings Article | 22 March 2021 Poster + Presentation + Paper

A method to characterize the mechanical impedance of thin stacked DEAs by suspension and electrical excitation

Yuya Kitazaki, Kentaro Takagi, Kota Kondo

Proceedings Volume 11587, 1158720 (2021) https://doi.org/10.1117/12.2584723

KEYWORDS: Haptic technology, Dielectrics, Polymers, Polymeric actuators, Energy efficiency, Electrodes, Dielectric elastomer actuators, Actuators

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Proceedings Article | 8 May 2020 Presentation + Paper

On the fluctuation phenomenon of axial thermal stress of a torsional fishing-line artificial muscle (Twisted Polymer Fiber) actuator

Hiroki Iwai, Kentaro Takagi, Chihaya Oiwa, Ken Masuya, Kenji Tahara, Toshihira Irisawa, Masatoshi Shioya, Haruhiko Watanabe, Daichi Sakurai, Kinji Asaka

Proceedings Volume 11375, 113751H (2020) https://doi.org/10.1117/12.2557783

KEYWORDS: Actuators, Polymers, Artificial muscles, Polymeric actuators, Physics, Mathematical modeling, Material characterization

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Proceedings Article | 24 April 2020 Presentation

Recent studies on simplification of a multi-physics model of IPMC sensors (Conference Presentation)

Kentaro Takagi, Kota Kondo, Zicai Zhu, Kinji Asaka

Proceedings Volume 11378, 113780Y (2020) https://doi.org/10.1117/12.2557806

KEYWORDS: Sensors, Actuators, Polymeric sensors, Polymeric actuators, Polymers, Composites, Humidity, Computer simulations, Complex systems, Computing systems

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Proceedings Article | 13 March 2019 Paper

Experimental investigation of temperature-dependent hysteresis of fishing-line artificial muscle (twisted and coiled polymer fiber) actuator

Hoshito Tanizaki, Kentaro Takagi, Chihaya Oiwa, Ken Masuya, Kenji Tahara, Toshihira Irisawa, Masatoshi Shioya, Kinji Asaka

Proceedings Volume 10966, 109660U (2019) https://doi.org/10.1117/12.2513834

KEYWORDS: Actuators, Polymers, Artificial muscles, Polymeric actuators

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Proceedings Article | 13 March 2019 Paper

Finite difference method and finite element method for modeling IPMC sensor voltage

Kota Kondo, Kentaro Takagi, Zicai Zhu, Kinji Asaka

Proceedings Volume 10966, 109661H (2019) https://doi.org/10.1117/12.2514243

KEYWORDS: Finite element methods, Sensors, Finite difference methods, Polymeric sensors, Polymers, Composites, Control systems design

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Proceedings Article | 27 March 2018 Paper

Charging efficiency of a passively switched flyback converter for dielectric elastomer generator

Toru Ikegame, Kentaro Takagi

Proceedings Volume 10594, 1059427 (2018) https://doi.org/10.1117/12.2295778

KEYWORDS: Capacitors, Dielectrics, Diodes, Energy harvesting, Capacitance, Energy efficiency, Transformers, Switches, Electrodes

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Proceedings Article | 27 March 2018 Paper

Gray-box modeling and control of torsional fishing-line artificial muscle actuators

Chihaya Oiwa, Ken Masuya, Kenji Tahara, Toshihira Irisawa, Masatoshi Shioya, Takuma Yamauchi, Eitaro Tanaka, Kinji Asaka, Kentaro Takagi

Proceedings Volume 10594, 1059428 (2018) https://doi.org/10.1117/12.2295899

KEYWORDS: Actuators, Polymers, Artificial muscles, Polymeric actuators, System identification, Control systems, Annealing, Control systems design, Modeling

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Proceedings Article | 15 March 2018 Paper

A parameter tuning method of negative capacitor circuit for piezoelectric shunt damping

Takuya Honda, Ichiro Jikuya, Kentaro Takagi

Proceedings Volume 10595, 1059533 (2018) https://doi.org/10.1117/12.2295891

KEYWORDS: Piezoelectric effects, Vibration control, Systems modeling, Control systems

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Proceedings Article | 17 April 2017 Paper

Study on simplification of a multi-physical model of IPMC sensor generating voltage as sensing signal

Jun Takeda, Kentaro Takagi, Zicai Zhu, Kinji Asaka

Proceedings Volume 10163, 101632T (2017) https://doi.org/10.1117/12.2258576

KEYWORDS: Systems modeling, Actuators, Sensors, Polymers, Computer simulations, Polymeric sensors, Partial differential equations, Ordinary differential equations, Finite element methods, Electroactive polymers, Modeling and simulation

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Proceedings Article | 17 April 2017 Paper

Energy harvesting by dielectric elastomer generator and self-priming circuit: verification by radio transmission

Toru Ikegame, Kentaro Takagi, Takamasa Ito, Hiroki Kojima, Hitoshi Yoshikawa

Proceedings Volume 10163, 1016331 (2017) https://doi.org/10.1117/12.2259937

KEYWORDS: Capacitors, Capacitance, Dielectrics, Diodes, Energy harvesting, Resistance, Transmitters, Energy efficiency, Numerical simulations, Electroactive polymers

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Proceedings Article | 17 April 2017 Paper

Position control of twisted and coiled polymer actuator using a controlled fan for cooling

Kentaro Takagi, Takeshi Arakawa, Jun Takeda, Ken Masuya, Kenji Tahara, Kinji Asaka

Proceedings Volume 10163, 101632V (2017) https://doi.org/10.1117/12.2259766

KEYWORDS: Digital signal processing, HVAC controls, Process control, Actuators, Polymeric actuators, Polymers, Control systems, Artificial muscles, Electroactive polymers, Feedback control, Switching

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Proceedings Article | 15 April 2016 Paper

Position control of fishing line artificial muscles (coiled polymer actuators) from nylon thread

Takeshi Arakawa, Kentaro Takagi, Kenji Tahara, Kinji Asaka

Proceedings Volume 9798, 97982W (2016) https://doi.org/10.1117/12.2218850

KEYWORDS: Actuators, Polymers, Artificial muscles, Polymeric actuators, Electroactive polymers, Control systems design, Control systems, Data modeling, Feedback control, Digital signal processing, Annealing

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Proceedings Article | 15 April 2016 Paper

A multi-physical model for charge and mass transport in a flexible ionic polymer sensor

Zicai Zhu, Kinji Asaka, Kentaro Takagi, Alvo Aabloo, Tetsuya Horiuchi

Proceedings Volume 9798, 97982O (2016) https://doi.org/10.1117/12.2218238

KEYWORDS: Polymers, Polymeric sensors, Electrodes, Sensors, Composites, Dielectrics, Mechanical sensors, Physics, Systems modeling, Actuators, Diffusion, Molecules

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Proceedings Article | 2 April 2015 Paper

Sensor-less parameter estimation of electromagnetic transducer and experimental verification

Toru Ikegame, Kentaro Takagi, Tsuyoshi Inoue, Ichiro Jikuya

Proceedings Volume 9431, 943138 (2015) https://doi.org/10.1117/12.2085115

KEYWORDS: Electromagnetism, Transducers, Sensors, Actuators, Resistance, Digital signal processing, Vibration control, Amplifiers, Data modeling, Magnetism

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Proceedings Article | 1 April 2014 Paper

Instability caused by parasitic resistances in piezoelectric shunt damping system with negative capacitor

Kento Okumura, Kentaro Takagi, Tsuyoshi Inoue, Ichiro Jikuya

Proceedings Volume 9057, 905738 (2014) https://doi.org/10.1117/12.2046192

KEYWORDS: Capacitors, Resistance, Capacitance, Piezoelectric effects, Numerical simulations, Amplifiers, Systems modeling, Device simulation, Sensors, Resistors

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Proceedings Article | 4 April 2012 Paper

Reduction of the stress-relaxation of IPMC actuators by a fluctuating input and with a cooperative control

Kentaro Takagi, Suguru Hirayama, Shigenori Sano, Naoki Uchiyama, Kinji Asaka

Proceedings Volume 8340, 83402J (2012) https://doi.org/10.1117/12.915161

KEYWORDS: Actuators, Sensors, Control systems, Polymers, Composites, Polymeric actuators, Feedback control, Electroactive polymers, Electrodes, Diffusion

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Proceedings Article | 29 March 2011 Paper

PWM drive of IPMC actuators with the consideration of the capacitive impedance

Kentaro Takagi, Naoya Yamaguchi, Kinji Asaka

Proceedings Volume 7976, 79762L (2011) https://doi.org/10.1117/12.880360

KEYWORDS: Amplifiers, Actuators, Polymers, Electroactive polymers, Device simulation, Modulation, Resistance, Circuit switching, Composites, Electronic filtering

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Proceedings Article | 9 April 2010 Paper

Robust PID force control of IPMC actuators

Shigenori Sano, Kentaro Takagi, Susumu Sato, Suguru Hirayama, Naoki Uchiyama, Kinji Asaka

Proceedings Volume 7642, 76421U (2010) https://doi.org/10.1117/12.847842

KEYWORDS: Actuators, Control systems, Sensors, Polymers, Control systems design, Krypton, Solids, Composites, Amplifiers, Polymeric actuators

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Proceedings Article | 6 April 2009 Paper

Distributed parameter system modeling of IPMC actuators with the electro-stress diffusion coupling theory

Kentaro Takagi, Takaaki Osada, Kinji Asaka, Yoshikazu Hayakawa, Zhi-Wei Luo

Proceedings Volume 7287, 72871Q (2009) https://doi.org/10.1117/12.816012

KEYWORDS: Diffusion, Systems modeling, Polymers, Actuators, Ions, Electrodes, Polymeric actuators, Sodium, Partial differential equations, Circuit switching

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Proceedings Article | 10 April 2008 Paper

Frequency response characteristics of IPMC sensors with current/voltage measurements

Kentaro Takagi, Norihiro Kamamichi, Boyko Stoimenov, Kinji Asaka, Toshiharu Mukai, Zhi-Wei Luo

Proceedings Volume 6927, 692724 (2008) https://doi.org/10.1117/12.776189

KEYWORDS: Sensors, Ions, Amplifiers, Data modeling, Model-based design, Solids, Polymers, Actuators, Composites, Plating

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Proceedings Article | 5 April 2007 Paper

On a distributed parameter model for electrical impedance of ionic polymer

Kentaro Takagi, Yoshihiro Nakabo, Zhi-Wei Luo, Kinji Asaka

Proceedings Volume 6524, 652416 (2007) https://doi.org/10.1117/12.715554

KEYWORDS: Ions, Electrodes, Sodium, Circuit switching, Polymers, Resistance, Distributed computing, Interfaces, Motion models, Capacitors

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Proceedings Article | 15 March 2006 Paper

An analysis of the increase of bending response in IPMC dynamics given uniform input

Kentaro Takagi, Yoshihiro Nakabo, Zhi-Wei Luo, Toshiharu Mukai, Masanori Yamamura, Yoshikazu Hayakawa

Proceedings Volume 6168, 616814 (2006) https://doi.org/10.1117/12.658421

KEYWORDS: Motion models, Actuators, Electrodes, Polymers, Partial differential equations, Video, Cameras, Electroactive polymers, Fluid dynamics, Composites

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Proceedings Article | 6 May 2005 Paper

Bending response of an artificial muscle in high-pressure water environments

Yoshihiro Nakabo, Kentaro Takagi, Toshiharu Mukai, Hiroshi Yoshida, Kinji Asaka

Proceedings Volume 5759, (2005) https://doi.org/10.1117/12.599412

KEYWORDS: Actuators, Artificial muscles, Robots, Polymers, Polymeric actuators, Electrodes, Video, Water, Polymer thin films, Composites

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Proceedings Article | 6 May 2005 Paper

Limited-angle motor using ionic polymer-metal composite

Kentaro Takagi, Zhi Luo, Kinji Asaka, Kenji Tahara

Proceedings Volume 5759, (2005) https://doi.org/10.1117/12.599503

KEYWORDS: Actuators, Polymers, Motion models, Composites, Electroactive polymers, Systems modeling, Polymeric actuators, Robotics, Sensors, Artificial muscles

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