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Design of semiactive rear damper for electrobikes
Uhlíř, Radim ; Růžička, Bronislav (referee) ; Strecker, Zbyněk (advisor)
When riding off-road motorcycle, the rider's comfort and the grip of the driven wheel are crucial factors. That is why efforts are constantly being made to develop better shock absorbers that provide better comfort and rideability. Semi-actively controlled magnetorheological dampers can provide a significant improvement in vibroisolation properties. The aim of this thesis was to design, manufacture and test a fast magnetorheological damper for the rear structure of the Kuberg Freerider off-road electric motorcycle. The design damping characteristics were based on those of the factory DNM Burner RCP-2S damper. The magnetic circuit of the damper was designed using magnetostatic FEM analysis and the time response of the piston group was verified using transient electromagnetic FEM analysis. Subsequently, structural analysis of selected parts was performed, and the damper was fabricated and tested. A function sample of the magnetorheological damper with a 240 mm pitch, 76 mm stroke, dynamic range of 9.1 at a piston velocity of 0.1 m/s and an average time response of 6.6 ms has been created.
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Design of a milling table for machining wooden boards
Uhlíř, Radim ; Mazal, Pavel (referee) ; Čípek, Pavel (advisor)
The bachelor's thesis deals with the design and implementation of a milling table for machining wooden boards. In the research part, an analysis of the solutions available on the market was performed together with an analysis of workpiece fixtures, hand milling fixtures and linear guides. Based on the research, two conceptual solutions and several variants of structural nodes were proposed. The most suitable constructional solution was selected from the conceptual solutions, calculations of critical nodes were performed and drawing documentation was made. Subsequently, a prototype of the table was made and its functionality was tested. The table can clamp and machine a wooden board with maximum dimensions of 1000 x 800 x 100 mm.
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Design of a milling table for machining wooden boards
Uhlíř, Radim ; Mazal, Pavel (referee) ; Čípek, Pavel (advisor)
The bachelor's thesis deals with the design and implementation of a milling table for machining wooden boards. In the research part, an analysis of the solutions available on the market was performed together with an analysis of workpiece fixtures, hand milling fixtures and linear guides. Based on the research, two conceptual solutions and several variants of structural nodes were proposed. The most suitable constructional solution was selected from the conceptual solutions, calculations of critical nodes were performed and drawing documentation was made. Subsequently, a prototype of the table was made and its functionality was tested. The table can clamp and machine a wooden board with maximum dimensions of 1000 x 800 x 100 mm.
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