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Development and Testing of the Pneumatic and Output System of the FANUC Spider Robot

Abstract

The aims of this paper are the development and testing of the pneumatic and output system of the FANUC Spider selecting robot that can be found at the Mechatronics Department, Engineering Faculty of the University of Debrecen. As a result the robot was shown to be capable of several working procedures with the use of the pneumatic vacuum gripper and the use of digital outputs.

Open access
Development of a Gait Recognition System in NI LabVIEW Programming Language

Abstract

Nowadays, the biometric identifier’s world is one of the most rapidly developing security technology areas. Within the biometric identification, the research team worked in the area of gait recognition. The research team developed a complex walking recognition system in NI LabVIEW environment that can detect multiple simultaneous reference points using a universal camera and capable of matching a predetermined curve to the collected samples. In the first version, real-time processing was done with a single camera, while in the second, two high-resolution cameras work with post-processing. The program can compare and evaluate the functions that are matched to the reference curve and the current curve in a specific way, whether two walking images are identical. The self-developed gait recognition system was tested on several test subjects by the research team and according to the results, the False Acceptance Rate was zero.

Open access
Difficulties in the Machining Super Duplex Stainless Steels

Abstract

Super duplex stainless steels are used in increasingly more areas. The machinability of duplex stainless steels is generally poor. We performed dry turning tests on G X2CrNiMoCuN 26-6-3-3 casted superduplex steel, using two different PVD coated cutting inserts. One of them was coated with TiAlN and other with TiAlSiN. Strong burr and built-up edge formation were observed during our machining experiments; these damaged the edges of the tools. The shortened tests did not show significant difference betwen the effect of the coatings.

Open access
Eddie – 3D Scanning and Augmented Reality in Education

Abstract

We are convinced that the learning process could be a lot more interesting and more interactive for young people with the help of modern technologies. The presence and the usage of the smartphones is natural for today’s young generations, although they do not use their inherent potential for example for educational purposes. Eddie is a hybrid of a smartphone application and a school book. The school book would keep its original form, but we would make the application fit for a given subject. The already existing pictures in the schoolbooks would work as a special indicator, which our application could read. The application would show different contents virtually in AR (Augmented Reality), based on the scanned image. The shown content could be a 3D model, animation or video.

Open access
High Feed Turning: Roughing and Finishing with the Same Insert?

Abstract

The tools of multi-directional machining, having appeared in the recent years, have revolutionised turning operations. The chip removal of high feed roughing and finishing inserts is so specialised, that new formulas have to be introduced instead of those used so far. In this paper, the result of tests carried out up till now will be summarised; furthermore, a proposal will be made on the description, analysis and calculation of force demand of multi-directional inserts as well as the roughness of the surface being prepared during machining.

Open access
How will Future Challenges Change Our Life at Home?

Abstract

Homemaking as a concept is fundamental for all, being a part of life. The foundation of this idea is a key momentum in everyday life. With the growth of a city’s population, the demand for increased of living space and buildings will increase too. In a city, green spaces are a matter of high importance regarding their positive impact. Keeping these we give a further meaning to creating living spaces. In the process we concentrate on unused spaces.

Open access
Implementation of an Interior-point Algorithm for Linear Complementarity Problem Working in a Wide Neighborhood

Abstract

In this article, we study the interior-point algorithm for solving linear complementarity problems, published by Xiaouje Ma, Hongwei Liu, Jianke Zhang and Weijie Cong from the implementation point of view. The algorithm was implemented in C++ programming language, thus supporting the effectiveness of the method. Despite the fact that the theoretical results refer only to the monotone linear complementarity problem, practical testing showed that the algorithm also works well in more general cases.

Open access
Manfréd Weiss – The Achievements of a Hungarian Entrepreneur

Abstract

There are several technical inventors in Hungary who unfortunately have been forgotten or are not commemorated sufficiently. One of such Hungarian is Manfréd Weiss. In our research we examine his life and work, a life devoted to our technological development. Moreover, beyond his life, we also explore the famous inventor-engineer’s technical achievements and their impacts today. We also study the characteristics of the era in which he lived, in order to better understand the work and context of the inventor better.

I would like to emphasise that during our exploration, we realised the importance of this choice of topic: It is the duty of the later generations to explore and learn the work of their predecessors, and to spread and publish the conclusions as widely as possible.

Open access
The Missing Holistic Approach in Design Application of Eurocode 3

Abstract

Steel Eurocodes have an important role in the correct and adequate design of steel structures. Most of the programs, which are used for the static analysis of these structures take into consideration the information offered by the Eurocodes, thus giving the opportunity to entrust them with the task of solving those problems which are not clear and easily understandable for the user. As will be proven in this article, Eurocode 3 in some cases does not offer proper, clear explanations regarding some decisions. The main criticism for the whole Eurocode package is that the user might not see clearly the connection between the scattered parts of the final solution.

Open access
Model-based Predictive Control of an HVAC System

Abstract

This paper presents the application of two model-based predictive control (MPC) algorithms on the cooling system of an office building. The two strategies discussed are a simple MPC, and an adaptive MPC algorithm connected to a model predictor. The cooling method used represents the air-conditioning unit of an HVAC system. The temperature of the building’s three rooms is controlled with fan coil units, based on the reference temperature and with different constraints applied. Furthermore, the building model is affected by dynamically changing interior and exterior heat sources, which we introduced into the controller as disturbances.

Open access