Miloš Božić | University of Kragujevac (original) (raw)

Papers by Miloš Božić

This paper presents educational set up for practical teaching about photovoltaic systems. The pap... more This paper presents educational set up for practical teaching about photovoltaic systems. The paper gives theoretical aspects of photovoltaic panels with description of the current-voltage characteristic. Measuring of electrical parameters using conventional measurement instruments and data acquisition system are shown. Usage of the measuring data acquisition systems speeds up obtaining important characteristics of photovoltaic panel. The main focus is on the processing and analysing of results, not on reading the data from conventional measurement instruments. The LabVIEW software automatically generates a report after completing the measurement. Ideas for further development of set up and enhance the teaching of photovoltaic modules are also given.

Facta universitatis - series: Electronics and Energetics, 2018

This paper describes the implementation of electronic gearing of two DC motor shafts. DC motors a... more This paper describes the implementation of electronic gearing of two DC motor shafts. DC motors are drives for a mobile robot with wheels in the form of wheel-leg (Wheg) configuration. A single wheel consists of two Whegs (dWheg). The first DC motor drives one Wheg, while the second one drives another independent Wheg. One motor serves as the master drive motor, while the other represents the slave drive motor. As the motors are independent, it is necessary to synchronize the speed and adjust the angle between shafts. The main contribution of this paper is the implementation of control structure that enables the slave to follow the master drive, without mechanical coupling. Based on encoder measurements, the slave effectively follows the master drive for the given references of speed and angle. Speed and positioning loops are implemented on real time controller-sbRIO. The laboratory setup was created and comparison of realized and required angles and speeds was made.

International Journal of Simulation Modelling, 2017

This paper presents laboratory simulator for wheellegged (Wheg) robot running and application for... more This paper presents laboratory simulator for wheellegged (Wheg) robot running and application for collecting measurement data. Data is used as a basis for modelling and optimization of energy consumption of running Wheg. The laboratory setup includes instrumented measurement treadmill (IMT) and Wheg drive. The laboratory experimental setup also includes the sensors, drives and software application. Intelligent modelling and optimization of energy usage during Wheg's running is based on a combination of neural networks and genetic algorithms. Neural network has established a correlation between the parameters of running. Using genetic algorithm optimal parameters for running are found. Simulation of neuro-fuzzy control system for minimization of energy usage during running was developed as a function of the angle and Wheg running speed.

The International Journal of Advanced Manufacturing Technology, 2016

This paper shows fuzzy and neuro-fuzzy intelligent systems for automatic control of mold filling ... more This paper shows fuzzy and neuro-fuzzy intelligent systems for automatic control of mold filling employed in casting plants. The concept of precision mold filling presupposes three key points in the process, i.e., precise pouring of the stream into the basin, maintaining constant level of molten metal in the basin, and finally, elimination of overflow of molten metal from the mold. The possibility of using fuzzy and neuro-fuzzy controls of mold-filling process was tested on a laboratory plant. Instead of molten metal, water was used, due to the approximate value of the Reynolds number of steel (1560-1600°C) and water at room temperature. Fuzzy and neuro-fuzzy controls of casting process were tested through many experimental attempts which have confirmed the possibility of application of these methodologies in the control of gravity casting process.

2014 11th International Conference on Remote Engineering and Virtual Instrumentation (REV), 2014

ABSTRACT This paper presents equipment and application for remote control of electromagnetic load... more ABSTRACT This paper presents equipment and application for remote control of electromagnetic load emulator. Emulator is dedicated for testing of electrical motors in laboratory environment. It can emulate different kinds of loads which can be found in industrial environment like pumps, funs, conveyors, elevators etc. The working principle of electromagnetic emulator is based on electromagnetic induction. Emulator control is realized with CompactRIO controller that has a web server so it can be accessed remotely. Programming is done via LabVIEW software.

The aim of this paper is to present a detailed description of one simple experimental setup for m... more The aim of this paper is to present a detailed description of one simple experimental setup for measurement of the magnetomechanical effect of the cylindrical shaft made of commercial steel. This setup contains mechanical parts that allow generation of static torsional stress to the shaft. It also contains a large solenoid that produces an alternating magnetic field for axial magnetisation of the shaft, which is placed in the centre of this solenoid. Another smaller solenoid is also placed inside the large solenoid and around the shaft to detect changes of the magnetic flux in the shaft under applied torque. The paper also presents initial measurement results obtained with this experimental setup, as well as proper discussion of these results.

Journal on Processing and Energy in Agriculture, 2021

The aim of this study was to design and apply the measuring acquisition system, or a device for d... more The aim of this study was to design and apply the measuring acquisition system, or a device for determining the limit values of eggshell strength using the puncture method. This study focused on class "M" eggs produced on a laying hen farm in the vicinity of Čаčak, and determined the external physical properties of egg quality: length, width, shape index and weight. In addition, the following eggshell properties were determined: weight, proportion, thickness, and puncture force. Average egg length was 58.05 mm, width 45.46 mm, and shape index 78.25. Average egg weight was 65.89 g, and the eggshell ratio 12.76% (8.44 g). Average eggshell thickness was 0.48 mm with a 4.69% coefficient of variation. Results showed that the tested eggs had uniform strength, with average value of the minimum shell puncture force 26.34 N, with a 0.95% coefficient of variation.

Poljoprivredna tehnika, 2021

During the manipulation of hen eggs from the farm to the consumer due to action of external force... more During the manipulation of hen eggs from the farm to the consumer due to action of external forces and weak mechanical strength of shell, the eggs break. The goal of egg producers is to reduce losses when breaking eggs during the production and placement, and thus increase revenues. Each egg can be damaged by external forces whose values are greater than maximum strength of the egg shell. Direct and indirect methods are used to determine the quality of eggs and shell strength. By direct methods, strength of the shell can be determined on the basis of puncture force measurements, impact forces, quasi-static compression forces and free fall forces on a known surface. In our research, a device was constructed for the realization of experiment and a direct method for determining strength of eggs was applied on the basis of measured breaking force of the shell. The device for measuring strength of eggs by the direct method of puncture eggshell was constructed and applied at the Faculty o...

Computer Applications in Engineering Education, 2017

This paper presents a new way of implementing a computer as a teaching tool in the teaching modul... more This paper presents a new way of implementing a computer as a teaching tool in the teaching module "Rotating Magnetic Field in AC machines." Software for simulation, measurement, and visualization of the rotating magnetic field using three-axis hall sensor was created in the form of remote experiment. After students' evaluation, it was found that remote experiments ensure better achievement of students regarding this particular topic, while also contributing to better quality of teaching rotating magnetic fields in the subject of electrical machines.

IMK-14 - Istrazivanje i razvoj

Smanjenje emisije štetnih gasova u atmosferu i time zagađivanje životne sredine se u velikoj meri... more Smanjenje emisije štetnih gasova u atmosferu i time zagađivanje životne sredine se u velikoj meri može podstaknuti povećanjem upotrebe obnovljivih izvora energije kao što je solarna energija, kako u cilju zagrevanja tople vode i grejanja prostora, tako i u generisanju električne energije. U ovom radu je data analiza hibridnog (kombinovanog)sistema sa PV/T panelom koji omogućuje istovremeno generisanje toplotne i električne energije, kao i komponenata prototipa laboratorijskog sistema za merenje toplotnih i električnih parametara ovih sistema. U radu su prikazani rezultati ispitivanja realizovanih merenja temperature, protoka, dobijene električne i toplotne snage u realnim vremenskim uslovima. Na osnovu analize komponenata sistema i rezultata ispitivanja predložene su izmene laboratorijskog sistema i opreme sa ciljem dobijanja preciznijih rezultata merenja.

This paper presents realized station for testing of electrical motors. Station has two main parts... more This paper presents realized station for testing of electrical motors. Station has two main parts: Emulator of load and part for control and monitoring of the whole system. Emulator is a calibrated electromagnetic brake. Emulator can emulate different types of load, like gravitational, linear, fan and compound load, which is combination of first three. Control of emulator and monitoring of motor parameters during testing is realized with Compact RIO controller. Graphical user interface is realized in LabVIEW. Results obtained during motor testing, are shown at the end, and compared with the MATLAB simulated results.

This paper presents equipment and application for remote control of electromagnetic load emulator... more This paper presents equipment and application for remote control of electromagnetic load emulator. Emulator is dedicated for testing of electrical motors in laboratory environment. It can emulate different kinds of loads which can be found in industrial environment like pumps, funs, conveyors, elevators etc. The working principle of electromagnetic emulator is based on electromagnetic induction. Emulator control is realized with CompactRIO controller that has a web server so it can be accessed remotely. Programming is done via LabVIEW software.