Browsing Mechanical Engineering by OzU Authors "Şendur, Polat"
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3-D dynamic walking trajectory generation for a bipedal exoskeleton with underactuated legs: A proof of concept
Soliman, Ahmed Fahmy; Şendur, Polat; Uğurlu, Regaip Barkan (IEEE, 2019-06)This paper presents a framework to address three dimensional (3-D) dynamic walking for a bipedal exoskeleton with underactuated legs. To achieve this goal, the framework is constructed via a trajectory generator and an ... -
Application of a disturbance observer based controller to improve vehicle ride
Şendur, Polat; Uğurlu, Regaip Barkan (Canadian Acoustical Association, 2019)In this paper the application of a disturbance observer based control algorithm is proposed to improve the vehicle ride performance of a vehicle that has magnetorheological damper (MR Damper) suspension. The vehicle is ... -
Co-ex: A torque-controllable lower body exoskeleton for dependable human-robot co-existence
Yıldırım, Mehmet Can; Kansızoğlu, Ahmet Talha; Emre, Sinan; Derman, Mustafa; Çoruk, Sinan; Soliman, Ahmed Fahmy; Şendur, Polat; Uğurlu, Regaip Barkan (IEEE, 2019-06)In this paper, we present our research study concerning the design and development of an exoskeleton that aims to provide 3D walking support with minimum number of actuators. Following a prior simulation study, the joint ... -
Critical review of the factors dominating the fracture toughness of CNT reinforced polymer composites
Al-Maharma, Ahmad Yousef Mohammad; Şendur, Polat; Al-Huniti, N. (IOP Publishing, 2019-01)In this study, the main factors, which have substantial influence on fracture toughness of carbon nanotubes (CNTs)-based composites both at nano and macro scales, are discussed in detail. Based on the findings from the ... -
Design sensitivity and optimization of powertrain mount system design parameters for rigid body modes and kinetic energy distributions
Şendur, Polat; Tunç, B. (Springer Nature, 2020-08-24)This study evaluates the influences of the powertrain mount design parameters on the frequencies of powertrain rigid body modes and their kinetic energy distributions (KEDs), which play an important role in the low-frequency ... -
The effect of curvic coupling joints on the roto rdynamic characteristics of gas turbines with tie-shaft
Şimşek, Uğur; Şendur, Polat; Yaşar, A. (Canadian Acoustical Association, 2019)The importance and use of curvic coupling joints are garnering interest in many aero-engine rotordynamics applications thanks to their benefits such as lower stress, higher service life, reliable positioning, precise ... -
The effect of interlaminar graphene nano-sheets reinforced e-glass fiber/ epoxy on low velocity impact response of a composite plate
Al-Maharma, A. Y.; Şendur, Polat (IOP Publishing, 2018-05)In this study, we compare the inter-laminar effect of graphene nano-sheets (GNSs) and CNTs on the single and multiple dynamic impact response of E-glass fiber reinforced epoxy composite (GFEP). In the comparisons, raw GFEP ... -
Effect of structural adhesives in noise, vibration and harshness (NVH) characteristics of vehicle body design
Şendur, Polat; Tunçer, Gözde (International Institute of Acoustics and Vibration, IIAV, 2018)Application of structural adhesives has received an increased interest in automotive industry due to their attractive characteristics as an alternative to other lightweight strategies. There are various modeling methods ... -
Fatigue characteristics of continuous welded rails and the effect of residual stress on fatigue-ratchetting interaction
Mansouri, Deniz; Şendur, Polat; Yapıcı, Güney Güven (Taylor & Francis, 2020-03-16)The importance of ratchetting-fatigue interaction is garnering interest due to complex failure mechanism of rail welds under cyclic loading. The objective of this paper is to investigate the fatigue characteristics of ... -
Frequency-based dynamic topology optimization methodology for improved door closing sound quality
Tuncer, Gözde; Şendur, Polat (Sage, 2019-12-05)Door closing sound quality of a vehicle has become one of the most important customer-related quality metrics in the recent years. There has been a vast amount of information on the design parameters contributing to this ... -
High power series elastic actuator development for torque-controlled exoskeletons
Yıldırım, Mehmet Can; Kansızoğlu, Ahmet Talha; Şendur, Polat; Uğurlu, Regaip Barkan (Springer Nature, 2019)This paper presents the development procedures of a high power series elastic actuator that can be used in torque-controlled exoskeleton applications as a high-fidelity torque source. In order to provide a high torque ... -
Impact of orifice location on the mechanical response of side and central orifice synthetic jets
Naseem, Mohammad Zohaib; Şendur, Polat; Arık, Mehmet (2018-07-24)Synthetic jets have been at the focus of a number applications including flow control and thermal management of microelectronics due to their unique characteristics of transferring linear momentum through a flow structure ... -
An integrated homogenization–based topology optimization via RBF mapping strategies for additively manufactured FGLS and its application to bandgap structures
Şimşek, Uğur; Gayir, C. E.; Kiziltas, G.; Şendur, Polat (Springer Nature, 2020)The manufacturing of lattice structures has been greatly facilitated thanks to the advances in additive manufacturing. Functionally graded lattice (FGL) structures, a major class of such structures, developed using topology ... -
A methodology to design multi-axis test rigs for vibration and durability testing using frequency response functions
Şendur, Polat; Ozcan, U.; Ozoguz, B. (2017-06-25)The multi-axis simulators are designed for experimental verification of the safe functioning of large components and subsystems under real world customer usage in vibration and durability testing. Transformation of the ... -
A methodology to optimize damping pad application on a complex structure using finite element models
Şendur, Polat; Gülşen, D.; Erman, C.; Tinar, E. (International Institute of Acoustics and Vibration, IIAV, 2018)Passive constrained layer damping patches have been extensively used for vibration and acoustics applications due to their capability to dissipate vibrational energy into heat. In this study, we perform an optimization ... -
Modal characterization of additively manufactured TPMS structures: comparison between different modeling methods
Şimşek, Uğur; Akbulut, Aykan; Gayir, C. E.; Başaran, Cansu; Şendur, Polat (Springer Nature, 2020-10-14)The use of lattice structures has received increasing interest in various engineering applications owing to their high strength to weight ratio. Advances in additive manufacturing technologies enabled the manufacturing of ... -
Modeling and control of flywheel mechanical hybrid powertrain for real world conditions
Şendur, Polat; Ozkara, A. (Canadian Acoustical Association, 2019)This paper focuses on dynamical response characteristics of a flywheel mechanical hybrid powertrain (FMHP), comprising a continuously variable transmission (CVT) and a flywheel integrated into a conventional vehicle with ... -
A new methodology to determine the design sensitivity of critical automotive body joints for basic design cycle
Tunç, B.; Şendur, Polat (Sage, 2019-09)As a result of more stringent requirements for improved fuel economy and emissions, there has been an increasing research activity to make vehicles lighter weight under some predetermined structural performance targets ... -
Numerical assessment of the factors controlling the acoustic response of wind turbine blades
Al-Maharma, Ahmad Yousef Mohammad; Şendur, Polat (Canadian Acoustical Association, 2019)The blades of wind turbine are the most critical parts of the wind turbine system, which contribute to noise generated by wind turbine due to excitation from air streams across them. In this numerical study, the effect of ... -
On the application of Harris hawks optimization (HHO) algorithm to the design of microchannel heat sinks
Abbasi, Ahmad; Firouzi, Behnam; Şendur, Polat (Springer Nature, 2019-12-03)A novel Harris hawks optimization algorithm is applied to microchannel heat sinks for the minimization of entropy generation. In the formulation of the heat transfer model of the microchannel, the slip flow velocity and ...
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