Author/Authors :
Zhang, Yongde Intelligent Machine Institute - Harbin University of Science and Technology, Harbin, China , Sun, Liyi Intelligent Machine Institute - Harbin University of Science and Technology, Harbin, China , Liang, Dexian Intelligent Machine Institute - Harbin University of Science and Technology, Harbin, China , Du, Haiyan Intelligent Machine Institute - Harbin University of Science and Technology, Harbin, China
Abstract :
Introduction. Magnetic Resonance Imaging has better resolution for soft tissue; at the same time, the robot can work in a stablemanner for a long time. MRI image-guided breast interventional robots have attracted much attention due to their minimallyi nvasive nature and accuracy. In this paper, a hydraulic-driven MRI-compatible breast interventional robot is proposed toperform breast interventional procedure.Methods. First is the analysis of the design requirements of the hydraulic-drivenMRI-compatible breast interventional robot, and then the design scheme is determined. Second, the three-dimensional modeland the link frames are established. The workspace of the robot end point is solved by MATLAB/Simu link software. Then,the 3D printing technology is used to make a physical model of the MRI-compatible breast interventional robot. After assembly and debugging, the physical model is used for workspace verification, and the simulation result of the work spaceshows that it is correct. Finally, the experimental research on the positioning error of the hydraulic drive is carried out,which established the theoretical foundation for the follow-up control research of the robot.Results. The positioning errorhas nothing to do with the motion distance, speed, and length of the selected tubing. The errors are 0.564 mm, 0.534 mm,and 0.533 mm at different distances of 40 mm, 80 mm, and 120 mm, respectively. The errors are 0.552 mm, 0.564 mm, and0.559 mm at different speeds of 3 mm/s, 5 mm/s, and 8 mm/s, respectively. The errors are 0.564 mm, 0.568 mm, and0.548 mm for different lengths of 0.5 m, 1 m, and 1.6 m, respectively. Then, the robot’s working space on theXOZplane andtheXOYplane meets the conditions.Conclusion. The structure of a differential rotary breast interventional robot is determined, with the link frames assigned to the mechanism and the Denavit-Hartenberg parameters given. Work spacesimulation of MRI-compatible breast interventional robot is done in MATLAB. The 3D printed MRI-compatible breast interventional robot is assembled and debugged to verify that its working space and positioning error meet the requirements.
