Modeling and Control of Four Degrees of Freedom Surgical Robot Manipulator Using MATLAB/SIMULINK

Abstract

Recent development of robot technology is revolutionizing the medical field. The concept of using robot assistance in medical surgery has been receiving more and more recognition throughout the world. Robot-assisted surgery has the advantage of reducing surgeons' hand tremor, decreasing post-operative complications, reducing patients' pains, and increasing operation dexterity inside the patients' body. Robotic assistants have been broadly used in many medical fields such as orthopedics, neurology, urology and cardiology, and robot assisted surgery is keeping expanding its influences in more general medical field. This research study aims at utilizing advanced robotics manipulator technologies to help surgeons perform delicate procedures associated with surgery. The Four-axis Virtual Robot arm (FVR) is a MATLAB-based computer program, which can be used to simulate the functions of a real robotic manipulator in terms of design parameters, movement and control. It has been designed with adjustable kinematic parameters to mimic a 4-axis articulate robotic manipulator with revolute joints having 4 degrees of freedom. The FVR can be manipulated using direct kinematics to change the spatial orientation of virtual objects in three dimensions. Picking and placing of virtual objects can be done by using the virtual proximity sensors and virtual touch sensors incorporated in to the jaw design of the FVR. Furthermore, it can be trained to perform a sequence of movements repeatedly, to simulate the function of a real surgical robotic manipulator. All steps to modeling are discussed in this research. Proportional-Integral-Derivative control technique is used to control of FVR.