Profile URL: https://hdl.handle.net/20.500.13091/11575
Job Title:Arş. Gör. Uzm.
Email Address:meaygahoglu@ktun.edu.tr
Main Affiliation:02.10. Department of Mechanical Engineering
Status: Current Staff
ORCID:
0000-0001-7363-159X
0000-0001-7363-159XScopus ID:
58630432000
58630432000YÖK Akademik: 371F575F8E606274
Web of Science ID:
KZX-2132-2024
KZX-2132-2024Name Variants:
Aygahoglu, Mert Eren Ayğahoğlu, M. E.
7 results
Scholarly Output Search Results
Now showing 1 - 7 of 7
Article Citation - WoS: 1Design Optimization of a Wearable Chair Using the Bees Algorithm(Sage Publications Ltd, 2024-07-23) Aygahoğlu, Mert Eren; Çakan, Abdullah; Kalyoncu, MeteA wearable chair is designed to reduce musculoskeletal disorders in workers. Two-staged optimization process using The Bees Algorithm is conducted to determine the lowest operable height of the chair and minimize the maximum force among the three supports. Geometric, dimensional, and rotational angle constraints are defined accordingly. A CAD model of the chair is imported into ADAMS software for simulation. The simulation results identified the most stressed rod in the chair. A spring is selected and implemented in ADAMS to counteract the applied force on this rod. A comparison between the force on the most stressed support and the spring force through a defined motion revealed minimal differences, indicating that the spring effectively counteracted the applied force. The results demonstrated the successful application of The Bees Algorithm to wearable chairs and the successful implementation of a spring to counteract applied force, thereby achieving the objectives of this study.Master Thesis Polinom Tipi Sabit Çaplı Kam Mekanizmalarının Kinematik Analizi(Konya Teknik Üniversitesi, 2022) Ayğahoğlu, Mert Eren; Şaka, ZiyaKullanımda daha yaygın olan kuvvet kapalı kam mekanizmalarının yanısıra, şekil kapalı olan sabit çaplı kam mekanizmaları da ucuz ve basit yapıları nedeniyle birçok uygulamada tercih edilmektedir. Bu tip kam mekanizmalarından olan ve profili daire yaylarından meydana gelen Reuleaux tipi kamlar, hız ve ivme karakteristiklerindeki süreksizlikler nedeniyle dinamik açıdan çok uygun olmadıkları için bunlar yerine bu olumsuzluklara sahip olmayan polinom tipi sabit çaplı eğrileri kam profili olarak kullanmak daha uygundur. Bu çalışmada, kinematik inversiyon prensibi uygulanarak doğrusal hareketli izleyicili ve sarkaç kollu izleyicili polinom tipi sabit çaplı kam mekanizmalarının genel kinematik analizi yapılmıştır. Literatürdeki çalışmalar incelenerek ve kısmen de deneme yanılma yöntemiyle elde edilen beş farklı polinom tipi sabit çaplı eğriden oluşan kam profilleri için detaylı konum, hız ve ivme grafikleri verilmiştir. Analiz sonucunda her bir profilin pratikte kullanılan Bekleme-Hareket-Bekleme hareket tipinin kama ait sabit mafsal noktası koordinatları değiştirilerek elde edilebildiği gösterilmiştir. Pratikteki standart kam hareket tipleri ve daire yayları ile oluşturulmuş Reuleaux tipi doğrusal hareketli kam mekanizmaları ile karşılaştırma yapılmış ve ele alınan polinom tipi sabit çaplı kam mekanizmalarının avantajlarına değinilmiştir. Ayrıca sabit çaplı kam tahrikli iki kol mekanizması, dört çubuk ve kol kızakta, yukardaki sabit çaplı eğrilerden oluşan profiller için kinematik analiz gerçekleştirilmiştir. Analiz sonucunda klasik dört çubuk ve kol kızakta elde edilmesi mümkün olmayan beklemeli hareketin, sabit çaplı kam tahrikli olan bu kol mekanizmalarının çıkış uzvunda elde edilebildiği kanıtlanmıştır.Article A General Semi-Mechanistic and the Bees Algorithm-Based Optimization Framework for Two-Roll Chocolate Refining: Target-Band Particle Size Control and Experimental Validation(Springer, 2026-05-28) Sen, Muhammed Arif; Kalyoncu, Mete; Cakan, Abdullah; Adsiz, Ahmet; Gumus, Mehmet Sefa; Aygahoglu, Mert Eren; Er, MustafaParticle size distribution (PSD) is a key process descriptor in chocolate refining because it affects rheology, texture development, and downstream processability. In industrial practice, however, two-roll refining conditions are still often adjusted empirically, which makes it difficult to consistently transform a broad inlet PSD into a controlled intermediate product band suitable for downstream refining. This study proposed a general semi-mechanistic and optimization-based framework for two-roll chocolate pre-refining, developed to predict and control the redistribution of particle volume from a coarse inlet range toward a prescribed outlet interval. The model integrated roll-gap-governed stressing, a population-balance-based redistribution structure, a daughter-distribution kernel, and a closed-circuit recycle representation within a unified computational framework. Rather than claiming direct observation of each internal mechanism, the framework was used to predict the outlet PSD response and its dependence on operating variables under a consistent engineering representation of compression-shear action, effective redistribution, and recycle-assisted coarse-particle control. The operating conditions are optimized using The Bees Algorithm (BA), enabling selective target-band formation rather than indiscriminate particle size reduction. Although the modelling framework is formulated in general form, its practical applicability is demonstrated through an industrial fixed-geometry case study based on a production-scale system with a roll diameter of 400 mm and a roll width of 1300 mm. In the application considered, the inlet particle population lies in the 150-800 mu m range and the desired outlet product is concentrated in the 120-150 mu m band. In this study, the two-roll unit was treated as an upstream pre-refining and pre-size-control stage in the chocolate paste preparation line, located before the downstream five-roll refining operation. Accordingly, the 120-150 mu m band was not interpreted as the final sensory target of finished chocolate, but as an intermediate engineering target used to narrow and stabilize the coarse feed before subsequent fine refining. The optimized solution is evaluated in terms of characteristic particle sizes, on-spec fraction, residual undersize and oversize fractions, specific energy consumption, thermal response, and cross-width uniformity. Experimental trials performed at MEMAK are used to compare numerical and measured cumulative and differential volumetric PSDs. The results show that the proposed framework captures the main redistribution behavior of the industrial process with good accuracy and successfully identifies an operating regime that concentrates most of the product volume within the desired target band. The study therefore provides both a general modelling framework for two-roll chocolate pre-refining and a practically validated basis for process optimization, operating-window identification, and future digital-twin-assisted industrial process control.Article Inverse Particle Size Distribution Targeting in Chocolate Roller Refining(Elsevier Sci Ltd, 2027) Şen, Muhammed Arif; Kalyoncu, Mete; Çakan, Abdullah; Adsız, Ahmet; Gümüş, Mehmet Sefa; Ayğahoğlu, Mert Eren; Er, MustafaChocolate quality and processability are strongly influenced by the particle size distribution (PSD) together with fat content and the emulsifier system, through their combined effect on rheology, texture, and sensory perception. Roller refining is a dominant industrial route to achieve target PSDs, yet practical recipe-to-PSD inverse design remains challenging because the process response is nonlinear, multi-stage, and depends on both operating conditions and effective material breakage behavior. This study presents an engineering-oriented PBMdriven inverse-design framework for roller refining in which a staged population balance model (PBM) is embedded into a constrained optimization loop to compute feasible roll-speed and throughput setpoints that match both PSD percentile metrics and the cumulative PSD curve. The Bees Algorithm (BA) is used here as a representative derivative-free solver choice for the resulting nonconvex, constraint-driven optimization problem; the contribution is the inverse-design formulation and validation rather than the selection of a specific meta-heuristic. A feasibility scan is introduced to quickly verify whether a target PSD lies inside a coarse reachable envelope under operating bounds, and selected effective breakage parameters are tuned under explicit regularization to mitigate model mismatch without overfitting. In the demonstrated case study, the optimized settings achieved close agreement with target metrics (d10, d50, d90, span) and a low cumulative-curve error (curveRMSE approximate to 0.0118). Experimental validation is provided by overlaying measured PSD data against both the target and model-optimized predictions in differential (volume %) and cumulative forms, showing strong agreement in the target size range. The proposed framework enables fast inverse tuning for roller refiner operation planning and provides a practical bridge between PBM modeling and industrial setpoint optimization.Article Dimension Optimization of Polycentric Knee Mechanism Using the Bees Algorithm and Genetic Algorithm(2023-06-26) Gümüş, Mehmet Sefa; Çakan, Abdullah; Kalyoncu, Mete; Ayğahoğlu, Mert ErenIn knee prostheses, the curve of the instantaneous center of rotation (ICR) and, therefore, stability of the prothesis are the most important parameters to be considered. The ICR curve depends on many parameters. One of them and the most effective one is the dimensions of four bar mechanism. In polycentric knee mechanisms, it has become inevitable to use optimization techniques while determining the dimensions of the mechanism for the stability of the prosthesis in the stance position. In this study, definitions of knee prostheses and polycentric knee mechanisms are given, optimization studies written in this field are mentioned thorough literature research. The study aims to find mechanism dimensions that gives ICR curve close to the reference curve by optimizing the mechanism dimensions of four-bar knee mechanisms. The Bees Algorithm and Genetic Algorithm (GA) were used for this purpose. The limits and objective function for the optimization were determined, and after many trials, separate mechanism dimensions with The Bees Algorithm and the Genetic Algorithm are obtained. By comparing the results, it has been observed that the dimensions obtained by The Bees Algorithm produced a better approximation to the reference instantaneous center of rotation curve.Other Laser Cutting Nesting and Path Optimization Based on the Bees and Nearest Neighborhood Algorithms(2023) Şen, Muhammed Arif; Ayğahoğlu, Mert Eren; Kalyoncu, Mete; Zaif, DoğukanArticle Kinematic Analysis of Constant Breadth Cam Driven Linkages(Konya Teknik Univ, 2023-06-01) Ayğahoğlu, Mert Eren; Şaka, ZiyaSeveral constant breadth curves are defined that can be used as cam profiles in constant breadth cam mechanisms that are closed cam mechanisms. There are two objectives for this study. One of them is to study the kinematic analysis of different type of constant breadth cam mechanisms. The other objective is to obtain a dwell period for constant breadth cam driven linkages that is impossible for a standard cam mechanism. A general kinematic analysis of a constant breadth cam mechanism with translating flat-faced follower was carried out with the principle of kinematic inversion. With the results, the kinematic analyses of the constant breadth cam driven inverted slider crank mechanism and four bar mechanism were examined in detail and a general method is given for all constant breadth cam profiles and cam driven linkages. It has been seen that a dwell period of 45° (with the fixed joint coordinates as x_n = 18 mm and y_n= 8.5 mm) and 40° (with the fixed joint coordinates as x_n = 18.5 mm and y_n= 8.5 mm) can be obtained in designed cam driven four bar and inverted slider crank mechanism respectively. After the displacement analysis, some velocity and acceleration analysis examples are given by taking the derivative of displacement. Similar kinematic analyses are possible for cam-driven mechanisms with more links. Also, it has been seen that changing the location of fixed joint of the cam profile can affect the displacement, velocity and acceleration graphics of the mechanism. With this, the dwell period can be changed too.
Research Topics
Domains
Physical SciencesLife SciencesHealth Sciences
Fields
EngineeringComputer ScienceAgricultural and Biological SciencesMedicine
Subfields
Biomedical EngineeringArtificial IntelligenceFood ScienceSurgeryIndustrial and Manufacturing Engineering
Specific Research Areas
Prosthetics and Rehabilitation Robotics
Metaheuristic Optimization Algorithms Research
Proteins in Food Systems
Total Knee Arthroplasty Outcomes
Vehicle Routing Optimization Methods
Food Chemistry and Fat Analysis
Sustainable Development Goals
9INDUSTRY, INNOVATION AND INFRASTRUCTURE
1
Research Products
Documents
3
Citations
2
h-index
1
Documents
4
Citations
2
Publication Collaboration
| Affiliation Name | Count |
|---|---|
| Konya Technical University | 5 |
| Konya Food and Agriculture University | 1 |
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Data obtained from OpenAlex
| Journal | Count |
|---|---|
| Food Biophysics | 1 |
| Journal of Food Engineering | 1 |
| Journal of Materials and Mechatronics:A (Online) | 1 |
| Konya mühendislik bilimleri dergisi (Online) | 1 |
| Proceedings of The Institution of Mechanical Engineers Part C-Journal of Mechanical Engineering Science | 1 |
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Scholarly Output
7
Articles
5
Views / Downloads
4/31
Supervised MSc Theses
1
Supervised PhD Theses
0
WoS Citation Count
1
Scopus Citation Count
0
Patents
0
Projects
0
WoS Citations per Publication
0.14
Scopus Citations per Publication
0.00
Open Access Source
4
Supervised Theses
1
Scopus Quartile Distribution
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