To join learning in interdisciplinary project teams and special lectures only offered on demand is a very effective and also an innovative teaching method for highly motivated students. This kind of teaching is characterized by very active participation by the students in the teaching process. Students exert influence on the contents in the projects and lectures during the course, professors exert influence of the scientific methods. The teaching process is consequently based on partnership of the students and the teaching staff.
An energy converting system that can function for years without maintenance is required for the drive of a left ventricular assist device (LVAD). To meet the requirements of safety, the energy converter should have a simple design with few moving elements. The design applied herein has only one moving part and thus has greater inherent safety than competing systems. The only moving part is the rotor unit, comprised of the impeller of a centrifugal pump, the rotor of an electric motor, and the rotor of an electric axial actuator. A reversal of flow of the transmitter fluid can be achieved with an axial shift of this rotor unit. This fluid acts on the outer surface of a blood chamber and enables it to draw in blood and to expel it. Valves direct the flow of blood. The energy converter performs a flow of 12 L/min at a motor speed of 6,000 rpm against a pressure head of 115 mm Hg according to an output of the pulsatile blood pump of 5 L/min.
A force sensor system that can operate in a measuring range up to I O kN with good stability and easy digitized output is presented. Its main working principle based on using vibrations of a double-plate construction. The forces to be measured will be introduced to both plates as an axial load. The characteristics of the vibrations of the plates depend on the axial load similar to a vibrating chord of a music instrument.The design and construction of the force sensor is fundamental for the force application conditions. In this case we designed it to measure axial loading of a cabel while laying.
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