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This paper proposes a bilateral control method focusing on the stability and force estimation accuracy for a pair of two-degrees of freedom(DOF) manipulators which have different structures. Bilateral control is a method that controls position and force bidirectionally between master and slave. By using this method, operators can get haptic sensation from the remote environment during teleoperation...
This paper proposes an online compensation method of gravity and friction by least squares method (LSM) for robots implementing haptics. In order to expand the range of tasks using the robot such as telepresence robot, implementing haptics technology is essential. However, with higher gear ratio motors, the friction lowers the quality of the haptic transmission. In order to comfortably control the...
This paper aims to realize sensorless motion transmission for haptic teleoperation between remote places. Sensorless systems are endurable against operations under harsh environments. This is a great advantage suitable for teleoperation systems. To achieve this purpose, two types of voltage compensation are proposed for torque transmission and velocity synchronization. These two targets are known...
In this paper, motion-reproduction system for picking by multiple-DoFs manipulator with a stereo camera is proposed. The conventional motion-reproduction is able to pick different sized objects because of considering force in the control system. However, the conventional system has difficulty in picking the positional changed objects in motion-reproduction. The proposed method compensates the positional...
Manipulating force ellipsoid and force polytope are measurements to evaluate force capability of manipulators. This paper extends these measurements to bilateral controlled manipulators. Control goals of bilateral control are synchronizing position and realizing the law of action and reaction between master and slave. In the steady-state, master and slave should output same magnitude force in reverse...
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