I like making, controlling, and playing with robots. Through my research, I hope to create robotic systems that can act in the chaotic, beautiful everyday environments that we live in, to hopefully make our lives a little bit easier. Currently, I believe that the introduction and exploitation of compliant structures are an important key to approach that problem. I hope to interact with a wide range of technologies, from the material to control level in my research.
UTokyo Graduate, to start a PhD in ETH Zurich from July.
▼CVupdated Apr 2022
▼Publicationsfull list of publications including co-authored papers
▼ブログ / Blog (in Japanese)
- 伸び仕草懲りて、暇乞い。 -07 Apr 2022
- macOSから離れてPreviewは神と気づいたので代替アプリを探してみた -06 Apr 2022
- 【2/2】WindowsでVPNサーバーを立ててルーター設定変更なしにiPhoneから接続する：クライアント設定編＆セットアップ・管理のTips -05 Apr 2022
- OLDER POSTS...
Soft Robotics Research at the Soft Robotics Lab, ETH Zurich
Design, fabrication and modeling of an integrated design for a soft continuum proprioceptive arm (SoPrA)Dec 2020 ~ May 2021
This was a 5 1/2-month research visit at the new Soft Robotics Lab conducted under the guidance of Prof. Dr. Robert Katzschmann, in which I have created a new design for a soft pneumatic continuum arm that uses fiber reinforcement to restrict radial expansion, contains internal proprioceptive sensors to measure the bending state of the robot, and developed an associated model that can describe the dynamic behavior of the soft robot.
- Yasunori Toshimitsu Ki Wan Wong, Thomas Buchner, Robert Katzschmann SoPrA: Fabrication & Dynamical Modeling of a Scalable Soft Continuum Robotic Arm with Integrated Proprioceptive Sensing, 2021 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS 2021), Prague, Czech Republic, 2021
Biomimetic Musculoskeletal Humanoid Robots
Research in biomimetic control of tendon-driven musculoskeletal humanoidsApr 2019 ~ Mar 2022
I am currently researching the control of musculoskeletal robots at the JSK robotics lab in UTokyo.
These robots mimic the musculoskeletal structure of the human body, and are hoped to generate more natural movements than conventional axis-driven robots.
However, the control of such robots is not straightfoward, and an infinite set of commands can be proposed even for simple reaching movements with the arm. My current research topic is to control these robots by applying principles discovered in neuroscience. Since the hardware of these robots are designed based on the human body, I hope that a similar approach to their software will yield effective motions.
- Y. Toshimitsu, K. Kawaharazuka, M. Nishiura, Y. Koga, Y. Omura, Y. Asano, K. Okada, K. Kawasaki, and M. Inaba,
Biomimetic Operational Space Control for Musculoskeletal Humanoid Optimizing Across Muscle Activation and Joint Nullspace, in 2021 International Conference on Robotics and Automation (ICRA 2021), presentation video
- Y. Toshimitsu, K. Kawaharazuka, K. Tsuzuki, M. Onitsuka, M. Nishiura, Y. Koga, Y. Omura, M. Tomita, Y. Asano, K. Okada, K. Kawasaki, and M. Inaba,
Biomimetic Control Scheme for Musculoskeletal Humanoids Based on Motor Directional Tuning in the Brain, in Proceedings of the 2020 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS2020)
- 利光 泰徳, 河原塚 健人, 都築 敬, 鬼塚 盛宇, 西浦 学, 古賀 悠矢, 大村 柚介, 冨田 幹, 浅野 悠紀, 岡田 慧, 川崎 宏治, 稲葉 雅幸
Motor Directional Tuning現象に基づく筋張力制御による筋骨格ヒューマノイドの上肢動作, in 日本機械学会ロボティクス・メカトロニクス講演会’20 講演論文集 (ROBOMECH20J), 1P1-G05, 2020, VIDEO
An autonomous oceanic surface vehicle for ionospheric measurementsSep 2018 ~ Dec 2018
- my blog post about it, in Japanese
The Ionobot was developed in collaboration with the MIT Lincoln Lab, as part of the 2.013 Engineering Systems Design capstone class. Fluctuations in the ionization level of the earth’s upper atmosphere lead to inaccuracies in GPS and radio signals. In this project, we have developed “Ionobot”, an autonomous surface vehicle that acts as an ocean platform for ionospheric measurement to take measurements not possible by existing ground-based stations. The boat must autonomously navigate to its designated location of measurement, and remain there for up to 6 weeks at a time under its own power.
In this project I have worked as the manager of the power supply system team. We created the required specifications through repeated discussions and negotiations with other teams (especially for solar panel size and battery weight), designed a system that met the needs for the required power output and oceanic / climate conditions, and evaluated the performance of the solar panels through experiments.
Soft Robotics Research at MIT CSAIL
Development of C++ program for dynamic control of pneumatic soft robotSep 2018 ~ Jan 2019
- my blog post about the experience, in Japanese
During my exchange program at MIT, I joined the Distributed Robotics Laboratory as an UROP student and conducted experiments on a soft pneumatic arm made of silicone. My contributions in the project included writing most of the C++ software that implements the proposed dynamic controller for the arm, fabricating the soft arm by casting silicone, and also proposing new parametrizations for describing the configuration of the arm.
R. K. Katzschmann, C. D. Santina, Y. Toshimitsu, A. Bicchi and D. Rus,
Dynamic Motion Control of Multi-Segment Soft Robots Using Piecewise Constant Curvature Matched with an Augmented Rigid Body Model, 2019 2nd IEEE International Conference on Soft Robotics (RoboSoft), Seoul, Korea (South), 2019
Internship at Connected Robotics
Lead developer for the original version of the ice cream robotFeb 2018 ~ Aug 2018
- Connected Robotics
- Article on Wantedly.com in Japanese(1/3, 2/3, 3/3)
- my blog post, in Japanese
- 日経ビジネス：セブン＆アイ・フードが導入、調理ロボットは最低賃金で働く(Japanese article)
Connected Robotics is a company in Tokyo that aims to revolutionize cooking through the use of robots. During my first internship there from February to August, I was assigned to start development of a new robot that can make soft serve ice cream.
The robot is designed not just to serve ice cream, but also to entertain customers as well- that is why it is designed as its own character. It also has a wide-angle camera that can detect customers and interact with them.
In its hand is a weight sensor (load cell), which can measure the weight on the hand. The data from this is used to dynamically adjust the speed of the spiraling movement when it is serving ice cream. This enables the robot to serve about the same amount of ice cream each time, regardless of the flow rate.
After 5 months of development, the robot was deployed to Huis Ten Bosch, a theme park in Nagasaki, Japan. I still occasionaly intern at Connected Robotics, and continue developing the robot. The video below is the newest iteration, with improved hardware, motion control, and software architecture. It can be seen in Makuhari, in the shopping center Ito Yokado.
Laser-cut Pino GachaDec 2019
- 森永乳業公式サイト:ピノガチャ (Japanese page)
not affiliated with Morinaga
Mini Walker Project
small leg robot that kind of walksFeb. 2018 ~ Apr. 2018
Watching the video 人間のような自然な歩き方をするロボット(Biped robot walks just like a human being.) inspired me to create one of my own walking mini robot. I decided to first read up on past research about bipedal walking algorithms, and found countless walking gaits. They range from simple (interpolating between known statically stable poses to create motion) to I-have-no-idea-how-it-works complex(sing convex optimization to plan dynamic motion trajectories for the Atlas robot).
Here, I implemented a gait based on the LIPM(Linear Inverted Pendulum Mode). It’s very lightly described in the video, but please refer to the original paper if you’re interested.
- Kajita, Shuuji & Kanehiro, Fumio & KANEKO, Kenji & Yokoi, Kazuhito & Hirukawa, Hirohisa. (2001). The 3D linear inverted pendulum model: A simple modeling for a biped walking pattern generation. 1. 239 - 246 vol.1. 10.1109/IROS.2001.973365.
- Garton H., Bugmann G., Culverhouse P., Roberts S., Simpson C., Santana A. (2014) Humanoid Robot Gait Generator: Foot Steps Calculation for Trajectory Following. In: Mistry M., Leonardis A., Witkowski M., Melhuish C. (eds) Advances in Autonomous Robotics Systems. TAROS 2014. Lecture Notes in Computer Science, vol 8717. Springer, Cham
Mini Mobile Manipulator
versatile armed robotDec. 2017 ~ May 2018
The robot was originally created as the end-of-year project for 3rd year students at UTokyo(Dec. 2017 ~ Jan. 2018), and I have later expanded its capabilities so it can be controlled through LINE, a popular messaging platform in Japan. It runs ROS, and I have also made it compatible with the motion planning library MoveIt!, so it can be moved to avoid collisions with itself or other obstacles. The body was designed in Fusion 360 and made with laser-cut MDF, and the robot arm is made by Kondo Kagaku.
As part of the May Festival exhibits at UTokyo, I have added the LINE messaging feature. To avoid users controlling the robot from a distance, a verification system using QR codes was created. Please see my newer video (in Japanese) for a demo video.
Winner at 2018 Bose Challenge hackathon @MITOct. 2018
- Dominic Co: user experience designer
- Jooyeon Lee: MIT HCI researcher
- me: software engineer
Real-time audio pace feedback with Bose AR
A connected rubber duck of the future!!Oct. 2017
Presented at JPHacks 2017, a student hackathon. It was a five-person team comprised of students from the University of Tokyo.
Designed to prevent drowning accidents in the bathtub. The Duck has an accelerometer built inside, and its data is sent wirelessly to a host PC. When it is detected that the human is drowning/passed out, it sends an alert to the server, which can update the Web interface as well as call family members on the phone.
I had great fun in contributing to this as the hardware engineer(the innards of the duck), and witnessing my talented teammates in action.
Android-controlled reptilian-ish robotDec. 2015 ~ Jan. 2016
This robot interfaces an Android device with an Arduino, so the robot can utilize the processing power, the display, the internet connectivity etc. of a smartphone. I developed this as the final project for an Android app developing course.
Falcon Heavy footage mixed with music from Apollo 13Feb. 2018
Just a random idea I had. Made it in just a few hours, but I’m quite proud of how it ended up.
A working educational model of a space probeJune 2017
Presented at FEEL 2017, an educational space event held in Sagamihara. Created by 4 members(including me) of the space science communication organization, Live in SPACE Project.
This “space probe” has multiple sensors inside(an accelerometer, gyroscope, temperature sensor and light sensor), communicates with the mission control(a PC) wirelessly and works on a battery. This lets the children hold and play around with the probe, guessing the roles of each sensor and learning about space exploration in the process. We also had a panel describing actual space missions, and the data that they collected by using the same types of sensors as found on LiS ONE.
summarize a video into a beautiful "map"Feb. 2017
Presented at the 2017 Yahoo! Japan Hackday hackathon, as a two-person team. An application written in Python that takes a video(.mp4) and subtitle file(.srt), and outputs an interactive summary of its contents.
Turns your screen into a "window"- without any special hardwareSep. ~ Oct. 2017
video coming soon, I hope…
A stupid website that I made a long time ago. It’s mostly in Japanese.