Space robots and Manipulator

Motion analysis of free flying robots

Free flying robot
photo
Tohoku Univ. Prof. Kazuya Yoshida

Papers

  • Kazuya Yoshida, R. Kurazume, Naoki Sashida, and Yoji Umetani, Modeling of Collision Dynamics for Space Free-Floating Links with Extended Generalized Inertia Tensor, Proc. IEEE Int. Conf. on Robotics and Automation, Vol.1, pp. 899-904, (1992).
  • Kazuya Yoshida, R. Kurazume, and Yoji Umetani, Dual Arm Coordination in Space Free-Flying Robot, Proc. IEEE Int. Conf. on Robotics and Automation, Vol. 1, pp. 2516--2521, (1991).

Impedance/Inertia matching for serial link manipulators

We propose a new index for dynamic performance analysis of serial link manipulators called the Impedance/Inertia Matching Ellipsoid (IME). Several indexes have been proposed for indicating the static and dynamic performance of robot manipulators. For example, the Dynamic Manipulability Ellipsoid (DME) characterizes distributions of hand acceleration produced by normalized joint torque, while the Manipulating-Force Ellipsoid (MFE) denotes static torque-force transmission efficiency from actuators at joints to a hand. On the other hand, the proposed IME characterizes dynamic torque-force transmission efficiency from actuators at joints to a load held at the hand of the manipulator. The IME encompasses a wide range of concepts proposed thus far as measures of a manipulator's performance. Both the DME and the MFE are derived from the IME as limiting forms regarding the load mass. We demonstrate the IME with numerical examples, including the selection of an optimal leg posture for jump robots, optimal active stiffness control, and an extension for manipulators mounted on satellites in outer space.

photo
IME, DME, and MFE
photo
Experiments using PA-10t

Papers