1. |
Sensorless Torque Control for Antagonistically Arranged Rotational-Type Twisted Polymeric Fiber Actuators. |
2. |
End-Point Stiffness Control for a Tendon-Driven Redundant Manipulator with Musculoskeletal Structure. |
3. |
Transition Movement Control between Wheel and Walking Movement for a Biped Robot with Hemispheric Feet. |
4. |
External sensorless object-orientation control using contact position estimation by the multi-fingered robot hand. |
5. |
Environmental Adaptability of Admittance and Impedance Control with Independent Anisotropic Rigidity. |
6. |
Sumitaka Honji, Kenji Tahara, Dynamic Modeling and Joint Design of a Cable Driven Soft Gripper, 2020 IEEE International Conference on Soft Robotics, 2020.05. |
7. |
Seunghyun Choi, Kenji Tahara, Development of a Visual-Tactile Fingertip Sensor and an Object Manipulation Method using a Multi-Fingered Robotic Hand, 2020 IEEE/SICE International Symposium on System Integration, SII 2020, 2020.01, In this paper, a novel visual-tactile sensor is proposed and an object manipulation method of a grasped object by a multi-fingered robotic hand is proposed by detecting a contact position using the visual-tactile sensor. The visual-tactile sensor is composed of a hemispheric fingertip part made of soft silicone with hollow inside and a general USB camera located at the inside of the fingertip to detect the displacement of many point markers embedded in the silicone. The deformation of each point marker due to a contact force is measured and a contact position is estimated in stable through a novel method of creating virtual points in figuring out the point clouds. Not only to demonstrate the estimation performance of the new visual-tactile sensor itself, but its practical usefulness in a grasping and manipulation task is also illustrated as well. By using a contact position obtained from the proposed sensor and the position of each fingertip obtained from kinematics, the position and orientation of a grasped object are estimated and controlled. Its performance is demonstrated through numerical simulation results.. |
8. |
Yuki Matsutani, Kenji Tahara, Hitoshi Kino, Hiroaki Ochi, Stiffness evaluation of a tendon-driven robot with variable joint stiffness mechanisms, 17th IEEE-RAS International Conference on Humanoid Robotics, Humanoids 2017, 2017.12, This paper proposes a new tendon-driven robot with variable joint stiffness mechanisms. The tendon-driven robot is able to vary the stiffness of joints by sliding variable stiffness mechanisms over the link by wire tensions. As a reason for that structure and moment arms of the tendon-driven robot are changed depending on the position of the variable mechanism. Thus in this paper, the tendon-driven robot with variable stiffness mechanisms is designed, and the stiffness of the tendon-driven robot is evaluated by using a stiffness ellipsoid.. |
9. |
Ken Masuya, Shu Ono, Kentaro Takagi, Kenji Tahara, Nonlinear dynamics of twisted and coiled polymer actuator made of conductive nylon based on the energy balance, 2017 IEEE International Conference on Advanced Intelligent Mechatronics, AIM 2017, 2017.08, This paper proposes a novel dynamics model of the twisted and coiled polymer actuator (TCPA) which is one of the artificial muscles recently discovered. It can be driven by Joule heating and can contract up to 25%. Most of the conventional works employed the linear model of TCPA which represents the relationships between the input voltage, the temperature, and the displacement, but the real TCPA shows the nonlinearity. Although a nonlinear model was proposed based on the curve fitting, it is difficult to apply the model to the various TCPAs. Additionally, the conventional works cannot explain the effect of the convective heat transfer condition on the displacement behavior of TCPA. This paper aims to construct a general nonlinear model of TCPA based on the following two ideas: (1) The energy balance of TCPA and (2) the temperature and velocity dependence of the heat transfer coefficient. The temperature model is obtained from the time derivative of the energy balance, and the displacement model is derived as Lagrange's equation of motion with the dissipation function. Through experiments, it is verified that the proposed model is closer to the real dynamics than the conventional linear model.. |
10. |
Kenji Tahara, Yuki Matsutani, Daisuke Nakagawa, Masataka Sato, Hitoshi Kino, Variable combination of feed-forward and feedback manners for set-point control of a musculoskeletal arm considering the maximum exertable muscular force, 42nd Conference of the Industrial Electronics Society, IECON 2016, 2016.12, In this paper, our previously proposed set-point control method for a musculoskeletal system is improved to reduce required muscular forces and to avoid a saturation of muscular forces during movement. The previous method is robust against a considerable time-delay in sensory information, but it still requires large muscular forces to accomplish a desired position, and the maximum exertable muscular force has not yet been taken into consideration. To cope with these two issues, two variable parameters are newly introduced. One is for changing the combination ratio of feed-forward and feedback controllers to reduce necessary muscular forces. The other is for avoiding the saturation of muscular forces during movement The effectiveness of the proposed controller is demonstrated through several numerical simulation results.. |
11. |
Takeshi Arakawa, Kentaro Takagi, Kenji Tahara, Kinji Asaka, Position control of fishing line artificial muscles (coiled polymer actuators) from nylon thread, SIPE, 2016.03. |
12. |
Tetsuya Morizono, Kenji Tahara, Hitoshi Kino, Experimental investigation of contribution of biarticular actuation to mappings between sensory and motor spaces, 41st Annual Conf. of the IEEE Industrial Electronics Society, 2015.11. |
13. |
Hiroaki Ochi, Hitoshi Kino, Kenji Tahara, Yuki Matsutani, Geometric conditions for feedforward positioning of musculoskeletal tendon-driven structure, 41st Annual Conf. of the IEEE Industrial Electronics Society, 2015.11. |
14. |
Tokuo Tsuji, Kosei Baba, Kenji Tahara, Kensuke Harada, KEN'ICHI MOROOKA, Ryo Kurazume, Grasp stability evaluation based on energy tolerance in potential field, IEEE⁄RSJ Int. Conf. Intell. Robots, Syst., 2015.09. |
15. |
Tomofumi Okada, Kenji Tahara, Development of a two-link planar manipulator with continuously variable transmission mechanism, 2014 IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM 2014, 2014.07, This paper proposes a novel two-link planar manipulator with continuously variable transmission (CVT) mechanism by means of plural linear shaft motors. In our previous works, we have proposed the parallel-link manipulator with the CVT mechanism which has two orthogonal DOFs. However, its configuration is not useful for a practical field because only one main link can be rotated around two joints like a joystick. In order for this mechanism to be more useful, the two-link planar type manipulator with the CVT is newly modeled and developed. Firstly, the proposed manipulator is modeled, and its control signals are designed. Next, the output force of the end-point of the manipulator is evaluated by using both the Manipulating-Force Ellipsoid and the Dynamic Manipulability Ellipsoid. After that, several fundamental experiments are performed to evaluate the CVT mechanism and show the effectiveness of the proposed manipulator.. |
16. |
Yuki Matsutani, Kenji Tahara, Hitoshi Kino, Hiroaki Ochi, Motoji Yamamoto, Set-point control of a musculoskeletal arm by the complementary combination of a feedforward and feedback Manner, 2014 IEEE International Conference on Robotics and Automation, 2014.06. |
17. |
Miao Li, Hang Yin, Kenji Tahara, Aude Billard, Learning object-level impedance control for robust grasping and dexterous manipulation, 2014 IEEE International Conference on Robotics and Automation, 2014.06. |
18. |
Kenji Tahara, Yuta Kuboyama, Ryo Kurazume, Iterative learning control for a musculoskeletal arm: Utilizing multiple space variables to improve the robustness, IEEE/RSJ Int. Conf. Intell. Robots, Syst., 2012.10. |
19. |
K. Tahara, K. Maruta, A. Kawamura and M. Yamamoto, Externally sensorless dynamic regrasping and manipulation by a triple-fingered robotic hand with torsional fingertip joints, IEEE Int. Conf. Robot. Automat., 2012.05. |
20. |
A. Kawamura, K. Tahara, R. Kurazume and T. Hasegawa, Robust manipulation for temporary lack of sensory information by a multi-fingered hand-arm system, IEEE/RSJ Int. Conf. Intell. Robots, Syst., 2011.09. |
21. |
K. Tahara, S. Iwasa, S. Naba and M. Yamamoto, High-backdrivable parallel-link manipulator with continuously variable transmission, IEEE/RSJ Int. Conf. Intell. Robots, Syst., 2011.09. |
22. |
K. Tahara and S. Arimoto, Iterative learinig scheme for a redundant manipulator: Skilled hand writing motion on an arbitrary smooth surface, IEEE Int. Conf. Robot. Automat., 2011.05. |
23. |
K. Tahara and H. Kino, Iterative learning control for a redundant musculoskeletal arm: Acquisition of adequate internal force, IEEE/RSJ Int. Conf. Intell. Robots, Syst., 2010.10. |
24. |
K. Matsuo, K. Murakami, K. Niwaki, T. Hasegawa, K. Tahara and Ryo Kurazume, A tactile sensing for estimating the position and orientation of a joint-axis of a linked object, IEEE/RSJ Int. Conf. Intell. Robots, Syst., 2010.10. |
25. |
K. Tahara, K. Maruta and M. Yamamoto, External sensorless dynamic object manipulation by a dual soft-fingered robotic hand with torsional fingertip motion, IEEE Int. Conf. Robot. Automat., 2010.05. |
26. |
K. Tahara, S. Arimoto and M. Yoshida, Dynamic object manipulation using a virtual frame by a triple soft-fingered robotic hand, IEEE Int. Conf. Robot. Automat., 2010.05. |
27. |
K. Matsuo, K. Murakami, T. Hasegawa, K. Tahara and R. Kurazume, Segmentation method of human manipulation task based on measurement of force imposed by a human hand on a grasped object, IEEE/RSJ Int. Conf. Intell. Robots, Syst., 2009.10. |
28. |
M. Yoshida, S. Arimoto and K. Tahara, Pinching 2D object with arbitrary shape by two robot fingers under rolling constraints, IEEE/RSJ Int. Conf. Intell. Robots, Syst., 2009.10. |
29. |
A. Kawamura, K. Tahara, R. Kurazume and T. Hasegawa, Dynamic grasping for an arbitrary polyhedral object by a multi-fingered hand-arm system, IEEE/RSJ Int. Conf. Intell. Robots, Syst., 2009.10. |
30. |
K. Tahara, S. Arimoto and M. Yoshida, Dynamic force/torque equilibrium for stable grasping by a triple robotic fingers system, IEEE/RSJ Int. Conf. Intell. Robots, Syst., 2009.10. |
31. |
M. Yoshida, S. Arimoto and K. Tahara, Modeling and control of a pair of robot fingers with saddle joint under orderless actuations, IEEE Int. Conf. Robot. Automat., 2009.05. |
32. |
H. Kino, S. Kikuchi, T. Yahiro and K. Tahara, Basic study of biarticular muscle’s effect on muscular internal force control based on physiological hypotheses, IEEE Int. Conf. Robot. Automat., 2009.05. |
33. |
S. Arimoto, M. Yoshida, M. Sekimoto and K. Tahara, A Riemannian-Geometry approach for dynamics and control of object manipulation under constraints, IEEE Int. Conf. Robot. Automat., 2009.05. |
34. |
K. Tahara, S. Arimoto and M. Yoshida, Dynamic object grasping by a triple-fingered robotic hand, IEEE/RSJ Int. Conf. Intell. Robots, Syst., 2008.09. |
35. |
K. Tahara, S. Arimoto, M. Sekimoto, M. Yoshida and Z.W. Luo, On iterative learning control for simultaneous force/position trajectory tracking by using a 5 d.o.f. robotic thumb under non-holonomic rolling constraints, IEEE Int. Conf. Robot. Automat., 2008.05. |
36. |
K. Tahara, S. Arimoto, Z.W. Luo and M. Yoshida, On control for "Blind Touching" by human-like thumb robots, IEEE Int. Conf. Robot. Automat., 2007.04. |
37. |
M. Onishi, Z.W. Luo, S. Hirano, K. Tahara and T. Mukai, Generation of human care behaviors by human-interactive robot RI-MAN, IEEE Int. Conf. Robot. Automat., 2007.04. |
38. |
K. Tahara, Z.W. Luo and S. Arimoto, On control mechanism of human-like reaching movements with musculo-skeletal redundancy, IEEE/RSJ Int. Conf. Intell. Robots, Syst., 2006.10. |
39. |
T. Odashima, M. Onishi, K. Tahara, K. Takagi, F. Asano, Y. Kato, H. Nakashima, Y. Kobayashi, T. Mukai, Z.W. Luo and S. Hosoe, A soft human-interactive robot RI-MAN, IEEE/RSJ Int. Conf. Intell. Robots, Syst., 2006.10. |
40. |
K. Tahara, Z.W. Luo, R. Ozawa, J.-H. Bae and S. Arimoto, Bio-mimetic study on pinching motions of a dual-finger model with synergistic actuation of antagonist muscles, IEEE Int. Conf. Robot. Automat., 2006.05. |
41. |
K. Tahara, Z.W. Luo, S. Arimoto and H. Kino, Sensory-motor control of a muscle redundant arm for reaching movements -Convergence analysis and gravity compensation-, IEEE/RSJ Int. Conf. Intell. Robots, Syst., 2005.08. |
42. |
K. Tahara, Z.W. Luo, S. Arimoto and H. Kino, Task-space feedback control for a two-link arm driven by six muscles with variable damping and elastic properties, IEEE Int. Conf. Robot. Automat., 2005.04. |