Vanderbilt University

Roger E Goldman

Andrea Bajo

Nabil Simaan

James Netterville

C Gaelyn Garrett

A rotatable wrist connecting a gripper tool to the distal end of a positioning shaft. The rotatable wrist includes a wrist hub that is non-rotatably connected to the distal end of the shaft. A wrist capstan is rotatably connected to the wrist hub and non-rotatably connected to an actuatable device (e.g., a gripper). A flexible wire loop extends through the wrist hub and partially contacts the wrist capstan. Linear movement of the flexible wire loop through the shaft causes rotation of the wrist capstan due to friction between the flexible wire loop and the wrist capstan. The wrist also supports selective detachability and control of roll, pitch and roll, pitch yaw and roll according to different embodiments.

Dexterous wrists

Methods and systems are described for controlling movement and an applied force at the tip of the continuum robot that includes a plurality of independently controlled segments along its length. An estimated force at the tip of the continuum robot is determined based on measurements of loads and positions of each segment. A reference position command and a force command are received from a user interface. The reference position command indicates a desired movement for the distal end of the continuum robot and the force command indicates a desired force to be applied by the tip of the continuum robot to a tissue surface. The position of the continuum robot is adjusted to cause the tip of the continuum robot to apply the desired force to the tissue surface based on the estimated force at the tip of the continuum robot, the reference position command, and the force command.

Systems and methods for safe compliant insertion and hybrid force/motion telemanipulation of continuum robots

A rotatable wrist connecting a gripper tool to the distal end of a continuum robot shaft. The rotatable wrist includes a wrist hub that is non-rotatably connected to the distal end of the shaft. A wrist capstan is rotatably connected to the wrist hub and non-rotatably connected to the gripper. A flexible wire loop extends through the wrist hub and partially contacts the wrist capstan. Linear movement of the flexible wire loop through the shaft of the continuum robot causes rotation of the wrist capstan due to friction between the flexible wire loop and the wrist capstan. The wrist also supports selective detachability and control of roll, pitch and roll, pitch yaw and roll according to different embodiments.

Dexterous wrists for surgical intervention

Methods and systems are described for controlling movement of a continuum robot that includes a plurality of independently controlled segments along the length of the continuum robot. The continuum robot is inserted into a cavity of unknown dimensions or shape. A plurality of forces acting upon the continuum robot by the surrounding cavity are estimated. A positioning command indicating a desired movement of the distal end of the continuum robot is received from a manipulator control. The desired movement is augmented based, at least in part, on the estimated plurality of forces acting on the continuum robot such that movement is restricted to within safe boundaries of the surrounding cavity. The positioning of the continuum robot is then adjusted based on the augmented desired movement.

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New York, NY, United States of America

Roger E Goldman