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1

Studying the parameters of indoor air in premises with infrared heaters

Spodyniuk Nadiia, Shelimanova Olena

Budownictwo o Zoptymalizowanym Potencjale Energetycznym

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2020

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Vol. 9 Nr 1

105--109

EN

The main causes of human heat loss are convection, conduction, radiation and evaporation. Conductive heat loss is so small that it can be considered alongside convective heat loss. The most characteristic factor of heat loss is radiation. As a result of experimental studies, a graph of air temperature in the work area was plotted showing the mobility of air at different heat capacities of the emitter. There was a significant increase in air temperature in the working area during air flows. The research findings can be used to design infrared heating in industrial buildings.

2

Approaches to the determination of the working area of parallel robots and the analysis of their geometric characteristics

Malyshev Dmitry, Rybak Larisa, Posypkin Mikhail, Usov Alexander

Engineering Transactions

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2019

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Vol. 67, iss. 3

333--345

EN

The article presents and experimentally confirms two approaches to the problem of determining the working area of parallel robots using the example of a planar robot DexTAR with two degrees of freedom. The proposed approaches are based on the use of constraint equations of coordinates. In the first approach, the original kinematic equations of coordinates in the six-dimensional space (two coordinates describing the position of the output link and four coordinates – the rotation angles of the rods) followed by projecting the solution onto the two-dimensional plane is used. In the second approach, the system of constraint equations is reduced to a system of inequalities describing the coordinates of the output link of the robot, which are solved in a two-dimensional Euclidean space. The results of the computational experiments are given. As an algorithmic basis of the proposed approaches, the method of non-uniform coverings is used, which obtains the external and internal approximation of the solution set of equality/inequality systems with a given accuracy. The approximation is a set of boxes. It is shown that in the first approach, it is more efficient to apply interval estimates that coincide with the extremes of the function on the box, and in the second approach, grid approximation performs better due to multiple occurrences of variables in inequalities.

3

Projekt wstępny robota ratowniczego

Bartnicki A., Krogul P., Muszyński T., Tchórz T.

Logistyka

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2015

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nr 3

197--205, CD 1

PL

W artykule omówiono znaczenie zastosowania bezzałogowych platform lądowych w ratownictwie. Przedstawione zostały zagrożenia i problemy jakie pojawiają się w trakcie prowadzenia tego typu akcji oraz wymieniono obszary gdzie platformy bezzałogowe mogły by zastąpić obecność człowieka – ratownika. Zaproponowano dwie koncepcje platform średnich o całkowitej masie nie przekraczającej 600 kg, zostały wyposażone w zestaw manipulatorów antropomorficznych o zbliżonych parametrach z możliwością szybkiej wymiany osprzętów roboczych. Zaproponowane koncepcje różnią się między sobą systemem obserwacji otoczenia, w jednej z nich system wizyjny zamontowano na oddzielnym wysięgniku teleskopowym, natomiast w drugiej system wizyjny tworzy integralną część z konstrukcją manipulatorów roboczych.

EN

The paper describes the importance of unmanned ground platforms application in rescue operations. Possible threats and problems which may occur in the course of such operations and areas where the unmanned ground platforms could substitute the rescuer presence were introduced. Two conceptions of medium platforms with total maximum weight less than 600 kg equipped with a set of similar anthropomorfic manipulators which enable quick change of attachment were proposed. The difference between proposed conceptions consists in the vision system. In the first one the vision system is mounted on an additional independent telescopic arm. In the second one it is integrated with the manipulators.

4

Entwicklung eines Modellgestützten Kippsicherheitssystems für Mobile Arbeitsmaschinen

Sontheim F.

Zeszyty Naukowe Instytutu Pojazdów / Politechnika Warszawska

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2010

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z. 4/80

93-101

EN

In the work presented here a security system for mobile working machines is described, which determines a safety value based on the movements of the working equipment. Subsequently, the control system responses to the movement of the machine and if necessary the whole system is stopped. The advantage of this development which is model based is a simple and low-cost sensor system. Moreover, the permanent identification of a safety value enables a full variable support of the working area. Consequently, the machine can be used more efficiently.