S. Tsujio

About

S. Tsujio is a robotics researcher whose work spans space robotics, robot manipulation, and sensor design — areas where precise mechanical understanding and innovative engineering converge. His most influential contribution, "Parameter Identification of Unknown Object Handled by Free-Flying Space Robot" (1994, 115 citations), addressed a critical challenge in space robotics: determining the inertial properties of unknown payloads grasped by manipulators aboard freely floating spacecraft, enabling more accurate system control. Building on this foundation, his 1992 work on flexible manipulator trajectory control (54 citations) tackled the complex coupled dynamics between a free-flying satellite body and structurally flexible arms. Tsujio also made significant strides in terrestrial manipulation, developing techniques to estimate mass, center of mass, and full inertia parameters of graspless or shape-unknown objects through pushing operations — work highly relevant to autonomous robotic handling. Complementing these algorithmic contributions, he invented the Strain-Deformation Expansion Mechanism, a novel hardware solution enabling high-sensitivity torque sensing in compact finger joints and high-stiffness 3-axis force sensing — a meaningful advance for dexterous robotic hands. With over 300 cumulative citations, Tsujio's research has meaningfully shaped how robots perceive and interact with unknown objects in both space and terrestrial environments.

Research Focus

Key Achievements

Top Papers

1. 1
   Parameter identification of unknown object handled by free-flying space robot

   115 citations · 1994
2. 2
   Trajectory control of flexible manipulators on a free-flying space robot

   54 citations · 1992
3. 3
   Estimation of mass and center of mass of graspless and shape-unknown object

   39 citations · 2003
4. 4
   Estimation of Object Inertia Parameters on Robot Pushing Operation

   28 citations · 2006
5. 5
   Torque sensing of finger joint using strain-deformation expansion mechanism

   26 citations · 2004
6. 6
   High-Stiffness and High-Sensitivity 3-Axis Force Sensor Using Strain-Deformation Expansion Mechanism

   15 citations · 2006
7. 7
   Estimation of object inertia parameters on robot pushing operation

   13 citations · 2005
8. 8
   Torque Sensing of Finger Joint Using Strain-Deformation Expansion Mechanism.

   10 citations · 2002
9. 9
   ESTIMATION OF MASS AND CENTER OF MASS OF UNKNOWN AND GRASPLESS CYLINDER-LIKE OBJECT

   9 citations · 2004
10. 10
    Inertia parameter estimation of planar object in pushing operation

    9 citations · 2006

Key Collaborators

Contact & Links