Yazar "Cakan, Abdullah" seçeneğine göre listele

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    Mechanical Design of Lower Extremity Exoskeleton Assisting Walking of Load Carrying Human
    (TRANS TECH PUBLICATIONS LTD, 2014) Sahin, Yusuf; Botsali, Fatih Mehmet; Kalyoncu, Mete; Tinkir, Mustafa; Onen, Umit; Yilmaz, Nihat; Cakan, Abdullah
    Exoskeletons are used in rehabilitation, military, industrial applications and rescuing, heavy-weight lifting and civil defense applications as well. This paper presents to design of a lower-extremity exoskeleton assisting walking of a load carrying human. Proposed exoskeleton system is designed to be appropriate mechanism with human lower extremity and it operates synchronously with the human realizes. The aim of exoskeleton actuator system is to provide forces against to external load carried by user during walking, sitting, and standing motions. Thus, it supports human walking and significant portion of external load carrying by the user. Also it makes possible to user spend less energy, less stress and fatigue. Proposed work involves the following design steps: kinematic synthesis of the exoskeleton, mechanical and electro-hydraulic system design.
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    Modeling and Controller Comparison for Quarter Car Suspension System by Using PID and Type-1 Fuzzy Logic
    (TRANS TECH PUBLICATIONS LTD, 2014) Cakan, Abdullah; Botsali, Fatih Mehmet; Tinkir, Mustafa
    Ensuring vehicle drive comfort and securing drive safety are the leading topics among the most interested issues for researchers in vehicle dynamics area. In this paper, a method utilizing a linear actuator is proposed for active control of the vehicle vibrations which are caused by road profile, intending to improve drive comfort and safety of road vehicles. The mathematical model belonging to the system that is evaluated as two degrees of freedom quarter car suspension system is derived by using Lagrange Equation of Motion and MATLAB/Simulink software. In addition to modeling technique, dynamic model of proposed system is created in MSC-ADAMS software and it is simulated in both Matlab and Adams programs together. Moreover two different controllers are designed, which are PID and Artificial Neural Network Based Fuzzy Logic (ANNFL) control in order to use in active vibration control simulations. Performances of the designed controllers are examined and the suitability of the designed controllers is studied by comparing their performances in case of using two different road profile functions.
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    Sliding Mode Control of a Two-link Robot Manipulator Using Adams & Matlab Software
    (IEEE, 2018) Ilgen, Sinan; Durdu, Akif; Gulbahce, Erdi; Cakan, Abdullah
    This paper presents the design of a sliding mode controller (SMC) for trajectory tracking problem for a two-link planar robot manipulator. A virtual prototype of the manipulator has been built by using Adams software. Also, the controller works is achieved in Matlab/Simulink software. The system is simulated in both Matlab and Adams software together which is called co-simulation. The manipulator system has two inputs (torques of actuators) and four outputs (angle of 1st joint, angle of 2nd joint and x-y components of end effector position). The sliding mode controller (SMC) is designed with the constant variation reaching law. The simulation results show that the sliding mode controller (SMC) can successfully achieve trajectory tracking of a two-link planar robot manipulator according to the desired trajectory.