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Article

A sensorless force-feedback system for robot-assisted laparoscopic surgery

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Figures & data

Figure 1. The surgical grasper (a) CAD model, (b) prototype.

Figure 1. The surgical grasper (a) CAD model, (b) prototype.

Figure 2. Comparison between force estimation and force measurement on grasp DOF.

Figure 2. Comparison between force estimation and force measurement on grasp DOF.

Figure 3. Force-reflecting robot prototype, (a) overall view, (b) cable-capstan transmission, (c) decoupling mechanism.

Figure 3. Force-reflecting robot prototype, (a) overall view, (b) cable-capstan transmission, (c) decoupling mechanism.

Figure 4. Master-slave teleoperation system.

Figure 4. Master-slave teleoperation system.

Figure 5. Block diagram of a 2-channel position-force bilateral teleoperation system.

Figure 5. Block diagram of a 2-channel position-force bilateral teleoperation system.

Table 1. Specification of the block diagram given in .

Figure 6. Contact instability.

Figure 6. Contact instability.

Figure 7. Performance of master robot after adding damping logic.

Figure 7. Performance of master robot after adding damping logic.

Figure 8. Experiment setup for stiffness differentiation on (a) grasp DOF, (b) pitch DOF, (c) yaw DOF.

Figure 8. Experiment setup for stiffness differentiation on (a) grasp DOF, (b) pitch DOF, (c) yaw DOF.

Table 2. Stiffness differentiation result.

Figure 9. The porcine liver with tumor phantom embedded.

Figure 9. The porcine liver with tumor phantom embedded.

Figure 10. Tumor detection result with (a) force feedback, (b) visual feedback.

Figure 10. Tumor detection result with (a) force feedback, (b) visual feedback.