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Presents the introductory welcome message from the conference proceedings. May include the conference officers' congratulations to all involved with the conference event and publication of the proceedings record.
The paper presents a study of electric field distribution on insulator strings, which are used for suspension of overhead transmission lines of 400kV and are stressed by power frequency voltage. The investigated insulator strings are used on transmission networks of National grid of Romania. The simulation uses the Finite Element Method (FEM) and COMSOL Multiphysics software to carry out the electric...
In practice, vector control methods are widely used offering the possibility to reach high performance. Certain application areas need optimum control in at limit operating conditions, as, operation at maximum torque. The paper presents how through the proposed control scheme at the output of the flux and the voltage controllers, provide direct the frequency and voltage values for an asynchronous...
This paper presents the architecture and control system for a hexapod robot with unconventional actuators. Each leg of the hexapod robot is a hyper-redundant soft robot, acted with electrorheological fluid. The possibilities of movement of the robot enable it to perform movements in any regime of movement. For example: displacement of robot body with parallel plan movement, on uneven ground, rotating...
Measurement performance evaluation is important, because measurement results depend usually on the method used for measurement. The analysis of the repeatability has to be made under some exact conditions: the same measurement procedure, observer, measuring instruments. Also using the same laboratory and conditions, the measurements must be repeated over a short period of time. Usually, repeatability...
In this paper is developed a flexible virtual instrument using LabVIEW for relative humidity measurement. The resulting virtual instrument eliminates the disadvantages of traditional measuring instruments whose functions cannot be changed by the user according to their needs, predefined by the manufacturer. Data acquisition interface (virtual instrument) was made in LabVIEW and give user the possibility...
This paper proposes a solution for crimped connection temperature measurement using data acquisition system NI PCI 6221, LabVIEW and thermocouple. The solution offers a modern alternative to traditional temperature measurement systems: a flexible virtual instrument with the advantages of changing the functionality by the users according to their needs. Virtual instrument was design in LabVIEW and...
In this paper the authors present an analysis of the command with rectangular (trapezoidal) printed currents of a permanent magnet synchronous motor (PMSM) for driving a bicycle. Constructive details and materials are presented. It also presents the results obtained from numerical simulations of the studied permanent magnet synchronous machine for its operating as a generator. In this operating regime,...
The entry signal of a Romanian railway station is an installation that allows or forbids the entry of a train in the station. Together with other, interconnected installation, the entry signal insures the railroad traffic safety. Any defect to the signal cause train delays, signal malfunctions may cause railroad traffic events. The diagnosis method proposed in this work comes to the aid of railroad...
Hybrid equations are used in studying theoretical resistive nonlinear equations because they have a structure that it is easy to analyze. However, hybrid equations are rarely used in practice because of their complicated formulation. In this work we present the analysis of analog circuit using hybrid method. In this paper we want to optimize the process of solving analog circuits using hybrid method.
The paper presents a new method and a new equipment for the dimensional stabilization of metal parts using controlled mechanical vibration technique. The dimensional stabilization through vibrations consists in using controlled vibrations to reduce the residual stress in metal parts or structures. The mechanical characteristics of metal parts have two basic components: the functional mechanical strength...
This paper presents a procedure to optimize the structure of the two magnetic coupled coils used in the wireless power transfer systems (WPTS's). The optimization of the two magnetic coupled coils is performed in function of the alignment coils. There are two forms of deviation in the alignment of coils — the lateral displacement and the angular displacement. In the lateral displacement, the two coils...
Environment concerns have gained more and more prevalence in the past decades, as better data and alarming prognosis regarding energy efficiency emerge from research. The private business sector already started to join the efforts with participation from both large companies and SMEs. Nowadays, in order to reduce energy costs and avoid penalties, companies concern themselves with an efficient use...
The approach and landing are the riskiest phases of flight and the probability of catastrophic accidents are rising due to reduced visibility in airport area. For increasing the safety and reliability of the aircraft at the approach and landing phase the Instrument Landing System, Precision Approach Radar, Microwave Landing System and Satellite Landing System can be used at instrument meteorological...
Retrofit solution for public lighting systems is given by replacing old lighting luminaires and / or old lighting lamps with improved solutions in terms of the lighting and electrical energy consumption lower than existing systems. Choosing a retrofit solution with changing lighting columns and retaining existing sites does not always lead to compliance with performance criteria standard for street...
Wave energy is an important renewable source of electricity that can be exploited. The reliability is an important issue for these energy converters due to the fact that they must be installed in harsh environments. The paper presents a reliability analysis of the linear generator type wave energy converters and shows the impact of the environment on the components of these devices.
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