Sürdürülebilir Yeşil Kampüs Koleksiyonu / Sustainable Green Campus Collection
Permanent URI for this collectionhttps://hdl.handle.net/11147/7755
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Master Thesis Augmented Reality-Based Model-Mediated Teleoperation: a Mobile Telerobot Case Study(Izmir Institute of Technology, 2019) Kirişci, Nihat Çağhan; Dede, Mehmet İsmet Can; Dede, Mehmet İsmet Can; 03.10. Department of Mechanical Engineering; 03. Faculty of Engineering; 01. Izmir Institute of TechnologyTeleoperation is defined as operating a robot in a remote environment. Teleoperation utilizes the strength and dexterity of robots and the interpretation and problem solving skills of humans. In a teleoperation system, the robot to be controlled is referred as the slave. The master is a device that the human operator interacts with to send commands to the slave or receive feedback from the slave environment such as haptic or audio. However, teleoperation of a robot in an unknown environment solely based on haptic and visual feedback is a demanding task. The effects of time delay in communication channels makes completing this task even more challenging. Model-Mediated Teleoperation (MMT) aims to solve this problem by creating a virtual model of the slave robot and the environment. This virtual model receives commands from the master and returns haptic feedback just as the real slave robot is interacting with the environment, effectively with no delay. However, without actually knowing where the position of the virtual robot corresponds in the real environment, it is still challenging to carry out the task. In this project, a novel augmented reality based method is proposed to render the virtual robot into the real life live video feed. Integration of the non-delayed robot into the real environment intends to solve this problem by enhancing the perception of the user.Master Thesis Teleoperation System Desing of a Robot Assisted Endoscopic Pituitary Surgery(Izmir Institute of Technology, 2018) Ateş, Gizem; Dede, Mehmet İsmet Can; Ateş, Gizem; Dede, Mehmet İsmet Can; 03.10. Department of Mechanical Engineering; 03.04. Department of Computer Engineering; 03. Faculty of Engineering; 01. Izmir Institute of TechnologyTeleoperation, also named telerobotics, is defined as controlling a robot over a distance by a remote controller. In a teleoperation setting, the human operator controls the master system(s) to the slave system(s) via wired or wireless communication channel. Genarally, in bilateral teleoperation, the human operator is informed about the slave environment via feedback signals (haptic, visual or audio) sent back from the slave environment. Commonly, teleoperated systems are more preferable in hazardous environments to protect the human operator; neverthless, there many other fields where the teleoperated systems are employed for various tasks. one of these areas, where teleoperation technology is becoming more popular,is the medical area. Telesurgical equipments allow more precise performance than a humman can achieve especially in minimally invasive surgeries. The purpose of this thesisis to develop a novel teleoperation system architecturewhich will be used to support the endoscopic pituitary surgery procedures which are classified under minimally invasive surgeries. Even though, the surgeon has only two hands, the proposed system aims to enable the surgeon to operate with three different surgical tools simultaneously including the endescope. he type of work is categorized under collaborative surgical robots, which incorporates a teleoperation system setup. he master control unit is a ring-shaped remote controller which consists of an inertial measurement unit and a wireless module. Surgeon wears the master system during the operation while holding a surgical tool such as the aspirator, and delivers the voluntary commands to the slave system by triggering a food pedal. The slave is the endescope holder robot which is a 8 degrees-of-freedom manipulator whose 3 degrees-of-freedom are active and the rest of them are passive. here is also an indicator panel which is used to provide visual feedback to the surgeon indicating the states of the surgey and excessive force application on the tissue.Master Thesis Compliant Control of a Teleoperated Endoscope Robot(Izmir Institute of Technology, 2018) Işıtman, Oğulcan; Işıtman, Oğulcan; Dede, Mehmet İsmet Can; Dede, Mehmet İsmet Can; 01. Izmir Institute of Technology; 03.10. Department of Mechanical Engineering; 03. Faculty of EngineeringWith the development of the technology, robots are started to be used in many medical application including minimally invasive surgery to overcome disadvantages of conventional open surgery procedures. This thesis is a part of the research project called “Robot-assisted endoscope control that can be controlled by the surgical tools (NeuRobo- Scope)” for the minimally invasive endoscopic pituitary gland tumor surgery side. During the procedure, endoscope is handled by a robot which moves the endoscope in the human nasal cavity and the movement of the endoscope is constrained by soft tissues. Another operation scenario is the positioning of the endoscope by the surgeon backdriving the endoscope holder robot. In the scope of this thesis, two research problems are addressed which are controlling the interaction between (1) surgeon - robot and (2) robot - soft tissue. First, the interaction of the surgeon and the robot is studied. Effects of the compliant controller parameters are experimentally tested by using a single degree of freedom non-backdrivable experimental set-up. A task is defined to quantitatively compare the effect of the controller parameters on the performance in terms of the energy efficiency and the accuracy. The second research problem involves human nasal tissue modeling in order to design an accurate controller. To acquire data from the human cadaver, a new hand-held measurement device is designed. The external forces and moments and the soft tissue models are obtained in an ex-vivo experiment. After the soft tissue models are identified, a modified interaction control is proposed for the teleoperated endoscope holder robot. The defined surgery procedure is tested with the proposed interaction controller via single degree-of-freedom experimental set-up. Experiments of the proposed controllers were successful for the defined operation scenario and the results show that it is possible to realize the motion control of the surgical robots in a constrained environment.Master Thesis Design of a Six Degree-Of Haptic Hybrid Platform Manipultor(Izmir Institute of Technology, 2010) Bilgincan, Tunç; Bilgincan, Tunç; Dede, Mehmet İsmet Can; Dede, Mehmet İsmet Can; 03.10. Department of Mechanical Engineering; 03. Faculty of Engineering; 01. Izmir Institute of TechnologyThe word Haptic, based on an ancient Greek word called haptios, means related with touch. As an area of robotics, haptics technology provides the sense of touch for robotic applications that involve interaction with human operator and the environment. The sense of touch accompanied with the visual feedback is enough to gather most of the information about a certain environment. It increases the precision of teleoperation and sensation levels of the virtual reality (VR) applications by exerting physical properties of the environment such as forces, motions, textures. Currently, haptic devices find use in many VR and teleoperation applications. The objective of this thesis is to design a novel Six Degree-of-Freedom (DOF) haptic desktop device with a new structure that has the potential to increase the precision in the haptics technology. First, previously developed haptic devices and manipulator structures are reviewed. Following this, the conceptual designs are formed and a hybrid structured haptic device is designed manufactured and tested. Developed haptic device.s control algorithm and VR application is developed in Matlab© Simulink. Integration of the mechanism with mechanical, electromechanical and electronic components and the initial tests of the system are executed and the results are presented. According to the results, performance of the developed device is discussed and future works are addressed.Master Thesis Position / Force Control of Systems Subjected To Communicaton Delays and Interruptions in Bilateral Teleoperation(Izmir Institute of Technology, 2012) Uzunoğlu, Emre; Dede, Mehmet İsmet Can; Uzunoğlu, Emre; Dede, Mehmet İsmet Can; 03.10. Department of Mechanical Engineering; 03. Faculty of Engineering; 01. Izmir Institute of TechnologyTeleoperation technology allows to remotely operate robotic (slave) systems located in hazardous, risky and distant environments. The human operator sends commands through the controller (master) system to execute the tasks from a distance. The operator is provided with necessary (visual, audio or haptic) feedback to accomplish the mission remotely. In bilateral teleoperation, continuous feedback from the remote environment is generated. Thus, the operator can handle the task as if the operator is in the remote environment relying on the relevant feedback. Since teleoperation deals with systems controlled from a distance, time delays and package losses in transmission of information are present. These communication failures affect the human perception and system stability, and thus, the ability of operator to handle the task successfully. The objective of this thesis is to investigate and develop a control algorithm, which utilizes model mediated teleoperation integrating parallel position/force controllers, to compensate for the instability issues and excessive forcing applied to the environment arising from communication failures. Model mediation technique is extended for three-degrees-of-freedom teleoperation and a parallel position/force controller, impedance controller, is integrated in the control algorithm. The proposed control method is experimentally tested by using Matlab Simulink blocksets for real-time experimentation in which haptic desktop devices, Novint Falcon and Phantom Desktop are configured as master and slave subsystems of the bilateral teleoperation. The results of these tests indicate that the stability and passivity of proposed bilateral teleoperation systems are preserved during constant and variable time delays and data losses while the position and force tracking test results provide acceptable performance with bounded errors.