Faculty of Mechanical Engineering

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Introducing additive manufacturing and augmented reality in the conceptual phase of the design process.
(Serbian Association of Geometry and Graphics, 2020)
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Enchanced Functionality Design of Soft Grabbing Robot With Virtual Reality
(American Society of Mechanical Engineers, 2022-09-12)
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Djokikj, Jelena
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<jats:title>Abstract</jats:title> <jats:p>The design phase in robotics engineering is the core action for defining functionality. In soft robotics, especially in soft grabbing mechanisms, the challenge is to envision the interaction with different objects in terms of shape, size and stiffness. By enhancing the design phase with virtual reality (VR), all involved entities in the process are provided with a visualization method that facilitates the process and supports the functionality definition. In this way, utilizing VR, we exploit the possibilities of the designed soft grabbing robot and at the same time analyze different applications. When it comes to grabbing objects, application can vary over industry and sizes: from harvesting fruits and vegetables in the agricultural industry, over sorting objects in warehouses, to handling break bulk in ports. In this paper we demonstrate the use of VR in the conceptual design phase of a smart robotic grasper inspired by elephant’s trunk. By applying VR in the early stages of the design process, we can analyze the robot and its interaction with the environment and intervene if needed in the CAD model. With this approach we are saving resources but more importantly time and at the end of the design stage we are confident in the robot’s functionality and performances.</jats:p>
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Virtual Reality Supported Design of Smart Grasper
(American Society of Mechanical Engineers, 2021-09-14)
Djokikj, Jelena
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<jats:title>Abstract</jats:title> <jats:p>Smart material graspers have shown potential for different applications in terms of functionality and actuation, especially in handling arbitrary shapes, fragile objects and complex 3D geometries. However, to take these initial designs further towards real applications, the challenge remains to determine the optimal size, shape, and passive and smart material location. Virtual reality can be beneficial in the early concept generation as it can help visualize and understand the grasping process. The access to suitable hardware and the development of virtual reality (VR) software has resulted in increased use of this technology. The 3D visualization offered by VR especially in the early stages of the design process assists engineers in making appropriate and efficient decisions, and it can also support the interaction with the end user to iterate on potential design improvements.</jats:p> <jats:p>The conceptual phase is often overlooked and rushed by the other departments involved in the design and development process although it is of great importance for successful outcome. It is important to make the most of it in order to assure quality result. In order to ensure short conceptual phase that will not reflect on the products’ quality we propose introduction of the VR in the early stages of the design process.</jats:p> <jats:p>In this paper we show how the use of VR can be beneficial in new product development. In this case we focus on the design of smart material grasper.</jats:p>
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Parametric design of a product family
(Faculty of Technical Sciences, 2023)
Rachikjevikj, Kristina
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Djokikj, Jelena
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Parametric design (PD) is an approach in which the parameters are set, and they are responsible for the outcome. The approach is known and familiar, but the new technologies and advancements in production are making it more applicable now. Parametric design is an emerging research issue in the design domain. The development of a product family requires product architectures in three domains, defining the required function, technological realization, and the physical realization. A product architecture separates the stable and the variable aspects of the design. By the proposed modeling approach, the focus of product configuration can be shifted to identification and definition of attributes instead of modules and components. It is also shown that classification is a means for identification of multiple abstraction levels. With this paper we want to explore the possibilities to use parametric design as a tool for the design of a product family. Parametric design is an approach that can be used for design of a family of products. At the same time this approach enables fast changes and modifications in the initial design. This is a fast and efficient way for serial production products but also for creation of unique and personalized products fast.
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Enchanced Functionality Design of Soft Grabbing Robot With Virtual Reality
(American Society of Mechanical Engineers, 2022-09-12)
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Djokikj, Jelena
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The design phase in robotics engineering is the core action for defining functionality. In soft robotics, especially in soft grabbing mechanisms, the challenge is to envision the interaction with different objects in terms of shape, size and stiffness. By enhancing the design phase with virtual reality (VR), all involved entities in the process are provided with a visualization method that facilitates the process and supports the functionality definition. In this way, utilizing VR, we exploit the possibilities of the designed soft grabbing robot and at the same time analyze different applications. When it comes to grabbing objects, application can vary over industry and sizes: from harvesting fruits and vegetables in the agricultural industry, over sorting objects in warehouses, to handling break bulk in ports. In this paper we demonstrate the use of VR in the conceptual design phase of a smart robotic grasper inspired by elephant’s trunk. By applying VR in the early stages of the design process, we can analyze the robot and its interaction with the environment and intervene if needed in the CAD model. With this approach we are saving resources but more importantly time and at the end of the design stage we are confident in the robot’s functionality and performances.</jats:p>
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Virtual Reality Supported Design of Smart Grasper
(American Society of Mechanical Engineers, 2021-09-14)
Djokikj, Jelena
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<jats:title>Abstract</jats:title> <jats:p>Smart material graspers have shown potential for different applications in terms of functionality and actuation, especially in handling arbitrary shapes, fragile objects and complex 3D geometries. However, to take these initial designs further towards real applications, the challenge remains to determine the optimal size, shape, and passive and smart material location. Virtual reality can be beneficial in the early concept generation as it can help visualize and understand the grasping process. The access to suitable hardware and the development of virtual reality (VR) software has resulted in increased use of this technology. The 3D visualization offered by VR especially in the early stages of the design process assists engineers in making appropriate and efficient decisions, and it can also support the interaction with the end user to iterate on potential design improvements.</jats:p> <jats:p>The conceptual phase is often overlooked and rushed by the other departments involved in the design and development process although it is of great importance for successful outcome. It is important to make the most of it in order to assure quality result. In order to ensure short conceptual phase that will not reflect on the products’ quality we propose introduction of the VR in the early stages of the design process.</jats:p> <jats:p>In this paper we show how the use of VR can be beneficial in new product development. In this case we focus on the design of smart material grasper.</jats:p>
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Visualisation of autonomouos vehicle interior in virtual reality
(Serbian Society for Geometry and Graphics (SUGIG) Faculty of Mechanical Engineering, University of Belgrade, 2023)
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Jankovic, Aleksandar
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Angeleska, Elena
In this paper we present the visualisation process of autonomous vehicle interior using virtual reality (VR). Autonomous vehicles are providing designers with more freedom in the design, since some traditional elements like driver position and controls are not needed. In addition, the autonomous vehicles are usually envisioned as a form of urban public transport in the future, meaning their interior should be designed to accommodate several passengers. The use of 3D models and renders is suitable for presenting the design of the interior of these vehicles, but the sense of space volume and ergonomics are not well presented. Using VR, we can provide full immersion of the user, providing the ability to completely visualize the interior of the vehicle. In addition, using game engines we are able to provide a complete virtual experience of the autonomous ride in an urban environment. In that way, visualisation in VR could be used to verify the design methodology utilized in the design process and verify the utilized interior design ergonomic standards.
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Design of a game controller for people with motor impairment
(Serbian Society for Geometry and Graphics (SUGIG) Faculty of Mechanical Engineering, University of Belgrade, 2020)
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Zhivkovski, Martin
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Introducing additive manufacturing and augmented reality in conceptual phase of the design process
(2020)
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New Product Design Development Based on Additive Manufacturing & Rapid Prototyping Methodology
(Department for Production Engineering, Faculty of Technical Sciences, Novi Sad, Serbia, 2015-01)
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Todays advanced methods used in developing, designing and construction of new products are based on iterative analyses of all the parameters associated with the manufacturing process. Defining the specification of a new product nowadays is often followed by the construction of a functional prototype that has most of the crucial parameters that characterize the actual product. Additive manufacturing (3D printing) is a technology commonly used to produce physical prototypes and models for applications varying from mechanical and product design to archaeology and medicine. Apart from having to address limitations inherent to the printing process, getting the needed part clearance on the CAD model can be challenging as well. In this paper, we’ll go through the steps needed for converting 3D models into printable, functional, non-assembly models with an accent on 3D printed thread connections. The methods presented here were used effectively in developing a functional packaging prototypes for honey jars.

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