Wyniki wyszukiwania - BazTech

1

Ocena energetycznych parametrów współpracy układu koło napędowe - droga leśna

Białczyk W., Cudzik A., Czarnecki J., Moś D.

Inżynieria Rolnicza

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2010

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R. 14, nr 1

15-21

PL

W pracy przedstawiono analizę współpracy układu koło napędowe-droga leśna w aspekcie strat energetycznych wynikających z poślizgu. Badania przeprowadzono na gruntowej drodze leśnej zlokalizowanej w Leśnictwie Nowa Wieś Książęca. Do badań użyto opony napędowe o rozmiarach 9.5-24 oraz 7.5-16. Pomiary przeprowadzono z wykorzystaniem specjalistycznego stanowiska do badan trakcyjnych w warunkach polowych. Badania wykazały, że najwyższe wartości sił napędowych i sprawności analizowane opony uzyskiwały przy poślizgu poniżej 15%. Dalszy wzrost poślizgu przejawiał się znacznym wzrostem strat energetycznych.

EN

The paper presents an analysis of cooperation in the drive wheel - forest road arrangement in the aspect of energy losses resulting from slip. The tests were carried out on a soil-surfaced forest road located in the Forest Administration Region of Nowa Wieś Książęca. Drive wheel tyres sized 9.5-24 and 7.5-16 were used in the tests. Measurements were carried out using specialist setup for traction tests in field conditions. The research has shown that highest values of driving forces and efficiency are reached by the analysed tyres at slip under 15%. Further slip growth was accompanied by a significant increase in energy losses.

2

Analiza obciążeń jednostek napędowych dla przestrzennych ruchów agrorobota

Graboś A., Boryga M.

Inżynieria Rolnicza

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2008

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R. 12, nr 7(105)

57-64

PL

W pracy przedstawiono sposób modelowania oraz wyniki komputerowej symulacji ruchu agrorobota, dla trzech różnych trajektorii ruchu. Badania symulacyjne, dla trzech wybranych torów ruchu chwytaka, przeprowadzono w programie Matlab (Simulink). Wyznaczono maksymalne wartości składowych momentów napędowych poszczególnych ogniw łańcucha kinematycznego i przedstawiono w postaci wykresów.

EN

The paper presents the modelling method and the results of agrorobot movement simulation by computer, for three different motion trajectories. Simulation tests for three selected paths of gripping device movement were performed using the Matlab (Simulink) application. The researchers determined maximum values of driving torque components for individual kinematic chain elements and presented them in form of diagrams.

3

Mathematical model for feed drive system in microscopic motion area

Yamazaki T.

Archives of Materials Science and Engineering

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2008

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Vol. 33, nr 1

35-38

EN

Purpose: Our objective is to develop an entirely new the feed drive system with the accuracy of tens nanometers and the stroke of tens millimetres achieved by only one mechanism. Design/methodology/approach: The dynamic driving torques can be measured when the sinusoidal waves of the microscopic displacement are applied to the AC servo motor. The mathematical model of the feed drive system that considers this dynamic behaviour is proposed. Findings: We make hysteresis phenomenon clear in the range from 2 μm to 100 μm by the nonlinear spring characteristics. Taking the friction model into account, the driving torque can be formulated. The proposed friction model represents successfully the experimental results for the sinusoidal wave within the ranges of amplitude from 2 μm to 100 μm. In case that the amplitude is 1 μm, though the amplitudes of the driving torque are slightly different, the curve shows the similar shape. Research limitations/implications: The results of this research covers the feed drive system with the AC servo motor and rolling guide. But, because the dynamic behaviour the rolling element was analyzed, it can be also applicable to the feed drive system with rolling element. Practical implications: This paper presents more details of driving torque in microscopic motion area, so that the performance of the feed drive system with rolling elements can be improved. Originality/value: The originality of this research project is to develop an entirely new feed drive system with the one mechanism and with the high accuracy.

4

Dynamic behaviours of driving torque of machine tools in microscopic motion

Yamazaki T., Kaneko S., Sato R.

Journal of Achievements in Materials and Manufacturing Engineering

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2007

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Vol. 20, nr 1-2

523-526

EN

Purpose: This paper presented more details for control analysis of the dynamic behaviors of the feed drive systems that have been widely used in machine tools. Design/methodology/approach: In order to analyze the nonlinear behaviors of the feed drive system in microscopic motion, the dynamic driving torques were measured when the sinusoidal waves of the microscopic displacement are applied to the AC servo motor. Findings: The experimental results showed that the distortion of the driving torque response to the sinusoidal wave input of the microscopic displacement becomes gradually evident as the input amplitude increases. With the particular input amplitudes of 200 mm and over, it can be found that the driving torque response for the displacement show the periodic response. It is considered in the AC servo motor used by experiment that the vibration is caused whenever the motor rotates by 20 degrees. It is consider that it is affected by the structure of the motor. Research limitations/implications: The results of this research covered the feed drive system with the AC servo motor and rolling guide. However, because the dynamic behavior the rolling element was analyzed, it was also applicable the feed drive system with the linear motor and rolling guide. Practical implications: This paper cleared more details of driving torque in microscopic motion, the performance of the feed drive system with rolling elements would be improved. Originality/value: The objective of this research project was to develop the feed drive system with the one mechanism and with the high accuracy.

5

Dynamic behaviours of driving torque of machine tools in microscopic motion

Yamazaki T., Kaneko S., Sato R.

Journal of Achievements in Materials and Manufacturing Engineering

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2006

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Vol. 15, nr 1-2

88--93

EN

Purpose: This paper presented more details for control analysis of the dynamic behaviors of the feed drive systems that have been widely used in machine tools. Design/methodology/approach: In order to analyze the nonlinear behaviors of the feed drive system in microscopic motion, the dynamic driving torques were measured when the sinusoidal waves of the microscopic displacement are applied to the AC servo motor. Findings: The experimental results showed that the distortion of the driving torque responses to the sinusoidal wave input of the microscopic displacement become gradually evident as the input amplitude increases. It was evident that the driving torque depends on the input amplitude, but not the input frequency. With the particular input amplitudes of 5um and over, it was clear that the trajectories for different initial driving torques show the same patterns. Research limitations/implications: The results of this research covered the feed drive system with the AC servo motor and rolling guide. However, because the dynamic behavior the rolling element was analyzed, it was alse applicable the feed drive system with the linear motor and rolling guide. Practical implications: This paper cleared more details of driving torque in(at) microscopic motion, the performance of the feed drive system with rolling elements would be improved. Originality/value: The objective of this research project was to develop the feed drive system with the one mechanism and with the high accuracy.