There is ample research on the effect of haptic teleoperation under delayed communication channels in terms of stability and system performance. Little attention, however, has been paid to the effect of delayed force feedback on users’ task performance and whether force feedback is beneficial under significant communication delays. This paper investigates whether force feedback improves user’s ...

The introduction of less invasive interfaces in control usually carry with them new drawbacks such as less perception, less dexterity, etc. This work tackles the experimentation of new means of perceptual feedback in teleoperation, when the operator guides the task by means of a visual exoskeleton, and consequently without any mechanical device that can be provided with haptic devices. The work...

Piezoelectric actuators are widely used in micro manipulation applications. However hysteresis nonlinearity limits accuracy of these actuators. This paper presents a novel approach for utilizing a piezoelectric nano-stage as slave manipulator of a teleoperation system. The Prandtl-Ishlinskii (PI) model is used to model actuator hysteresis in feedforward scheme to cancel out this nonlinearity. T...

A forbidden-region virtual fixture (FRVF) is a constraint, implemented in software, that keeps the slave manipulator of a master/slave telemanipulation system from entering into a forbidden region of the workspace. In this paper, we consider the problem of unstable vibrations of the slave against the FRVF for a general class of telemanipulator control architectures. The master and slave equilib...

This thesis summarizes guidelines for the design and control of a highly integrated, multi-modal, and intuitive teleoperation system that can be used to perform a variety of different manipulation tasks requiring bimanual and multi-fingered interactions as well as the collaboration of multiple operators. Hereby, exclusively teleoperation systems using admittance-type devices are investigated. B...

Previous research on teleoperation has focused on manipulation of hard objects. However, the design constraints are different in applications that involve manipulation of deformable objects, such as robotic telesurgery. In this paper a new measure for fidelity in teleoperation is introduced which quantifies the teleoperation system’s ability to transmit changes in the compliance of the environm...

ThiJ puper addresses the issue of dynamic similarity and intensive property invariance in scaled bilateral naunipulation, and ofsers a design methodology bused on these considerations. Dimensional analysis methods are utilized to form the basis of a constrained optimization problem that enables selection of a force scaling factor that minimizes the intensive distortion of the environment. The p...

Shared control represents a middle ground between supervisory control and traditional bilateral control in which the remote system can exert control over some aspects of the task while the human operator maintains access to low-level forces and motions. In the case of dexterous telemanipulation, a natural approach is to share control of the object handling forces while giving the human operator...

This paper investigates the use of arm-grounded force feedback applied to an operator's fingertips while performing telemanipulation tasks with a dexterous robot hand. The forces were applied by a cable-driven feedback device used in conjunction with an instrumented glove. Experiments were conducted to evaluate subjects' ability to discriminate between objects of different size and stiffness, a...