Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"Hydraulik"”.
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Condition monitoring für HFA-Hydraulik mit ölhydraulischen Geräten
Industrial production facilities ought to offer high "Technical Availability". Also due to the costs they have to satisfy demands for maintenance strictly according to actual conditions; for HFA-hydraulics this is equivalent to the requirement ofleading important components close to their limits of …
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Life Cycle Assessment der alterungsbedingten Umweltverträglichkeit biogener Hydraulik-Schmierstoffe
Biogenic hydraulic fluids, based on synthetic esters (categorie: HEES), have an excellent environmental profile in the unused state, so that they are typically classified into water hazard class 1 or as "not hazardous to water". During storage at room temperature and tribological application, …
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Finite Element Procedures in Modelling the Dynamic Properties of Rubber
Rubber is not only a non-linear elastic material, it is also dependent on strain rate, temperature and strain amplitude. The non-linear elastic property and the strain amplitude dependence give a non-linear dynamic behavior that is covered by the models suggested in this thesis. The focus is on a …
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Aktive Sekundärmaßnahmen zur Vermeidung von fahrzustandsabhängigen Geräuschen in hydraulischen Lenksystemen
In hydraulic power steering systems of motor vehicles, often unintended acoustic phenomena can result from certain driving situations. The acoustic phenomenon known as “rattling” is generated by impacts on the steering cylinder, if the car rides over bumps, kerb stones or similar obstacles. In …
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Automatische Optimierung von Grundwasserhaltungen in von Hochwasser beeinflussten Aquiferen
Moving the dikes back from the river and building flood detention basins are up-to-date measures for flood protection. The new flood plains are larger and in closer vicinity to build up areas. In times of flood the groundwater level is already high, due to new flood plains it will be raised …
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Estimation of the In-Cylinder Air/Fuel Ratio of an Internal Combustion Engine by the Use of Pressure Sensors
This thesis investigates the use of cylinder pressure measurements for estimation of the in-cylinder air/fuel ratio in a spark ignited internal combustion engine. An estimation model which uses the net heat release profile for estimating the cylinder air/fuel ratio of a spark ignition engine is …
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Self-energizing electro-hydraulic brake
This thesis presents research results on a new fluid-mechatronic brake principle. The Self-energizing Electro-Hydraulic Brake (SEHB) utilizes the effect of instable self-reinforcement in combination with a closed loop control. Background for the development of the brake concept is a train …
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Structure-acoustic analysis; finite element modelling and reduction methods
This thesis investigates structure-acoustic systems by use of finite element analysis. The systems studied here are limited to those that consist of an enclosed acoustic fluid cavity, which is coupled to a flexible structure and/or a porous sound absorbing material domain. This type of analysis is …