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  • Author: Gheorghe Ion Gheorghe x
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Open access

Dorin Angelescu and Gheorghe Ion Gheorghe

Abstract

As a result of the scientific concerns of the Doctoral School of Mechanical Engineering and Mechatronics at Valahia Târgovişte University in the field of robotics dedicated to security and surveillance, the scientific work "Intelligent Cyber- Mixmechatronic Micro-System for Monitoring and Controlling the Security and Surveillance Robots" is in the testing and experimentation phase, within the doctoral (industrial) thesis "Studies, research and contributions regarding the realization of a smart mecatronic robot for security and surveillance applications". The scientific work results in a highly efficient cybermixmecatronic system, unique in Romania, which will be used to control the mechatronic security and surveillance robot, respectively the propulsion and control of its displacement. The robot is controlled through Artificial Intelligence, using the Internet of Things (IoT), which is why the Intelligent Motion Control system must be optimized both in terms of response speeds and energy. At the same time, due to the varied and possibly unstable conditions of the displacement field, the system must meet stringent criteria of reliability, resilience, weather, stability and redundant solutions for on-site repair of potential failures during missions. The cybermixmecatronic system designed to move the robot must carry it safely at the mission site so that it can then return it back to the Command and Control Center. In the paper will be presented the original solution, applicable with minimum of specific modifications (according to the chassis used), to any type of robot requiring both operator-controlled or autoguid control. Thus, a complex project will be realized combining into a unitary Mechatronics, Integronics, Cyber-Mixmechatronics, Artificial Intelligence and Information Technology.

Open access

Dorin Angelescu and Gheorghe Ion Gheorghe

Abstract

Outcome of the scientific concerns from the Doctoral School of Mechanical Engineering and Mechatronics at Valahia University of Târgovişte in the field of unconventional measurements using non-contact laser technique, the scientific work “Intelligent 3D video-laser system for measuring distance and avoidance of obstruct obstacles integrable into robotic platforms” is a work in progress being in the experimental phase of single-channel testing. The system is designed for robotic platforms for special interventions in high-risk work environments, with the main goal of an active, real-time 3D spatial stereo interface for the operator who manages the robotic platform remotely. 3D imaging and real-time measurements of distances provide the operator of the robotic intervention platform with the ability to perform extremely precise maneuvers. The scientific work ultimately results in an intelligent integral system that can predict the emergence of an obstacle to the robotic platform movement, thus determining the distance in real time to it. The measuring distance is between 0 m - 40 m, with an accuracy of +/−0.5 cm being synchronized with the video system with a clear visual area from 0.05 m to infinity. The 3D video laser system can simultaneously shoot movie or single images of the obstacle, storing data in 3D, photo or video digital formats, both locally in non-volatile memory or externally thru any GPSR network to the operator and / or to a control center. In later development, the measurement system will be coupled to a GPS network for auto location of position and architected with a self-defense and offensive module mounted on the mobile robotic platform. Thus, this complex project combines in a unified knowledge of Mechatronics, Integronics, Cyber-Mix Mechatronics, Artificial Intelligence and Information Technology.

Open access

Dănuţ Stanciu and Gheorghe Ion Gheorghe

Abstract

There are several constructive variants of devices built for complex control of engagement on both sides aimed at controlling both internal and external shocks, all of which featuring a standard wheel compound. By the method of forced tooth engagement fitted between the standard wheel and the measuring wheel and using the spectral analysis, constructive errors of the gear wheels can be quickly determined, especially those consisting in shocks and the variation of the distance between the axes, errors that severely impact on operation. At the National Institute of Research and Development in Mechatronics and Measurement Technique was developed a device used to control shock values and the distance between the axis of the gearboxes (for four of the gearbox speeds) by means of forced engagement and complex harmonic analysis.

Open access

Valentin Gornoava, Gheorghe Ion Gheorghe and Liliana-Laura Badita

Abstract

The main objectives of the present project are to study and to improve mechanical properties of different systems from mechatronic and biomedical domains, in order to increase their functionality and life span. This is why nanostructured thin films (e.g. Al, Cr, Ti, Ti/Al multilayers) were deposited on different steel substrates, used in mechatronic and biomedical applications. By the characterization of coated surfaces of the products used in various fields such as medicine, mechatronics, electronics, etc. depends their proper operation, durability and reliability. This is the main reason why, we studied new types of layers and multilayers using Atomic Force Microscopy and scratch tests. The main result of the realized tests is that all studied nanostructured thin films offer the possibility of increasing the lifetime of substrates, being an important factor for proper functional operation, durability and reliability of the final systems in which they are used.

Open access

Gheorghe Ion Gheorghe, Anghel Constantin and Iulian Ilie

Abstract

The current scientific work show for the first time, (i) a new complex mixmechatronic concept of integration and fusion in the structures of smart technical and technological systems and (ii) the systems of electronic control for holistic physical-virtual assembly.

The content of the paper highlight some results of professional researches in Mechatronics and Cyber-Mix Mechatronics fields at the National Institute of Research and Development in Mechatronics and Measurement Technique– Bucharest and also at Politehnica University of Bucharest (PUB) from Romania. Some of these results are in the process of transfer and capitalization to the industry, economy and society.

Open access

Anghel Constantin and Gheorghe Ion Gheorghe

Abstract

The paper presents an original concept for interfacing tactile force sensors in modern cyber-mechatronic systems. The authors show the results and conclusions of a PSPICE simulation of an original patented circuit. In the simulations, in models used were introduced some circuit components corresponding to the physical implementation for a practical mechatronic system which has already been used for the analysis of human walking. After these simulations were revealed important aspects of dynamic behavior and was proposed an optimal variant of the interface circuit as a non-typically instrumentation differential circuit spitted in two parts, one near to the sensor, and the second far from the sensor and close to an A/D converter of the data acquisition system. For electrical links between the two parts can be used low cost cable without important loss of the signal / noise ratio.

Open access

Ion V. Ion, Gheorghe Ciocea and Florin Popescu

Abstract

In this work, the reduction of greenhouse gas emission, and the energy saving by integrating solar collectors and photovoltaic panels in a Stirling engine based microcombined cooling, heating and power (mCCHP) system are studied. The mCCHP system consists of a natural gas Stirling CHP and an adsorber chiller. When the thermal outputs of the Stirling CHP and solar collectors are not sufficient to cover the heat demand for domestic hot water (DHW), heating/cooling, an auxiliary heating boiler starts to operate. The energy saving by using solar energy varies from 13.35% in December to 59.62% in April, in the case of solar collectors usage and from 7.47% in December to 28.27% in July, in the case of photovoltaic panels usage. By using solar energy the annual GHG emission decreases by 31.98% and the fuel cost reduction varies from 12.73% in December to 49.78% in June.

Open access

Mihai Botu, Ion Botu, Gheorghe Achim, Silvia Preda, Anca Scutelnicu and Simona Giura

Abstract

Conservation of fruit tree biodiversity is important for the mankind according to the Convention on Biological Diversity. In Romania, due to favorable environmental conditions, numerous genetic resources of plum, apple, walnut, hazelnut, sweet chestnut and other

fruit crops are present. Identification, evaluation and conservation of fruit genetic resources activities were launched in 1970’ in order to limit the loss of the biodiversity due to erosion and genetic vulnerability. Fruit Growing Research & Extension Station (SCDP) of Valcea, which is belonging now to the University of Craiova, was assigned to deal with conservation of genetic resources for the Prunus, Juglans, Corylus and Castanea genera. As result, national hazelnut collection, the sweet chestnut collection and a part of the plum and walnut national collections are located here. Genetic resources of Malus, Pyrus, Sambucus, Carya and Salix are hold in the active collections too. The ex situ collections include 1160 accessions, out of those 48 species, 533 cultivars and 565 other types like hybrids, biotypes, mutants, etc. Autochthonous or ‘original’ accessions include 173 local cultivars and 565 other genotypes. Breeding activity based on valuable germplasm conducted to releasing of a total number of 31 cultivars and 8 rootstocks registered in the Romanian Official Catalogue for Varieties, 15 varieties have been patented in Romania and for one by CPVO. Identification, in situ evaluation, collection, ex situ evaluation, propagation and regeneration activities regarding fruit tree genetic resources have to be continued in order to conserve the local fruit tree biodiversity and to value it through breeding and use of the new varieties in the orchards.

Open access

Gheorghe Ion Gheorghe, Vasile Bratu, Adriana Cîrstoiu and Veronica Despa

Abstract

The scientific paper presents in summary the new concepts regarding the realization of cyber-mix-mechatronic systems with different industrial and societal applications.