Sökning: "control or direct"
Visar resultat 11 - 15 av 559 avhandlingar innehållade orden control or direct.
11. Adaptive and model-based control in laminar boundary-layer flows
Sammanfattning : In boundary-layer flows it is possible to reduce the friction drag by breaking the path from laminar to turbulent state. In low turbulence environments, the laminar-to-turbulent transition is dominated by local flow instabilities – Tollmien-Schlichting (TS) waves – that exponentially grows while being con- vected by the flow and, eventually, lead to transition. LÄS MER
12. Direct-Ground Cooling Systems for Office Buildings: Design and Control Considerations
Sammanfattning : Direct-ground cooling systems are defined as systems in which the ground is used as the only source for cooling mainly in commercial buildings. These systems benefit from exchanging heat with the ground, of which its temperature is basically constant below a certain depth year around. LÄS MER
13. Exploiting Direct Optimal Control for Motion Planning in Unstructured Environments
Sammanfattning : During the last decades, motion planning for autonomous systems has become an important area of research. The high interest is not the least due to the development of systems such as self-driving cars, unmanned aerial vehicles and robotic manipulators. LÄS MER
14. On Robot Feedback from Range Sensors : Reliable Control by Active Reduction of Uncertainty and Ambiguities
Sammanfattning : This thesis is on modelling and experimental tests when non contact sensing isused for feedback control in robotics. The motion of the robot is to be controlled relative to objects in the surrounding workspace during operations like gripping/docking, surface following, shape measuring etc. LÄS MER
15. Modeling and Model-based Control of Automotive Air Paths
Sammanfattning : The strive towards cleaner and more efficient combustion engines, driven by legislation and cost, introduces new configurations, as exhaust gas recirculation, turbocharging, and variable valve timing, to name a few. Beside all the positive effects on the emissions and fuel consumption, they all affect the air-charge system, which increases the cross-couplings within the air-path control, making it an even more complex system to control. LÄS MER