Urban Mobility Board
A project by Damir Bijedic and Fabian Proprentner
in cooperation with the HTL Mössingerstraße.
Urban Mobility Board
About the project
The "Urban Mobility Board" represents a new and innovative form of transportation for modern people. Because of its robust design and the stability resulting from the standing position, it is particularly suitable for the difficult urban enviroment.
With the UMB, speeds of up to 25 km / h can be achieved. This is achieved by using an environmentally friendly electric motor. The control is intuitive. It utilizes displacement of the body weight into the desired direction of travel.
Drive
DC motor & motor electronics
The heart of a drivable device is, of course, the drive. Because of the required high starting torque, the choice was made to use a powerful, brushed DC motor, which is attached directly to the board. The transmission of power to the wheel takes place via a toothed belt with a 1 : 6 ratio.
The motor is controlled by a high-performance H-bridge ciruit, which enables driving the board in both directions. In order to cope with the high currents caused by accelerating and braking, special high-performance components must be used for the electronics, which can withstand currents of more than 250 Ampere.
Controlling
Engine control software
Because of the new design and control of the Urban Mobility Board, extremely fast and precise controlling is necessary. At the same time, the controller must ensure that the board and the driver can balance themselves and also regulate the acceleration or deceleration appropriately.
For this purpose, the current status data of the board is recorded using modern sensors. This data is then sent to a powerful Arduino microcontroller and processed by it. This is done by a self-written algorithm that has been tested by numerous tests.
Hardware components
Aluminum frame & motor bracket
Another important part of the Urban Mobility Board are the hardware components such as the frame, the engine mount and, of course, the wheel. These parts must fulfill various criteria to ensure their full functionality. The materials must be stable and light at the same time. For example, steel would achieve the required stability, but would be far too heavy.
Therefore, the frame and the engine mount are made out of lightweight and resistant aluminum. To increase the safety of the rider, the treadboards use wooden boards with non-slip strips, while a used go-kart tire is used for the wheel in order to provide further stability.
Next
Team
Damir Bijedic
prototyping, hardware development
Fabian Proprentner
control software, circuit board design
Gernot Opriessnig
supervision