Perception and Action in Teleoperated Needle Insertion

Area of Science:

• Robotics
• Human-Computer Interaction
• Biomechanics

Background:

• Teleoperation systems are susceptible to latency, impacting user performance.
• Accurate force feedback is crucial for tasks involving physical interaction, like needle insertion.
• Understanding the effects of delay on motor control and perception is vital for designing effective telerobotic systems.

Purpose of the Study:

• To investigate the impact of time delay on motor control and perception during simulated needle insertion into nonlinear soft tissue.
• To determine if perceptual and motor transparency can be achieved in a virtual teleoperation task.

Main Methods:

• Experimental study using a force field emulating elastic soft tissue with a rigid nonlinear boundary.
• Simulation of a simplified mechanical model of the arm and neural controller.
• Development of a perception model based on force-position space regression.

Main Results:

• Time delay led to motor underestimation of tissue stiffness, with no significant perceptual change.
• Simulation results supported the experimental findings.
• Modifying teleoperation gain compensated for the motor effects of delay without introducing perceptual distortion.

Conclusions:

• It is possible to achieve both perceptual and motor transparency in a virtual one-dimensional remote needle insertion task.
• Gain adjustment in teleoperation channels can mitigate the motor consequences of delay.
• Further research can explore more complex haptic feedback mechanisms for telerobotic surgery.