Sökning: "aircraft operation"

Visar resultat 31 - 35 av 39 avhandlingar innehållade orden aircraft operation.

1. 31. Laser Spectroscopic Techniques for Combustion Diagnostics Directed Towards Industrial Applications

   Författare :Hans Seyfried; Förbränningsfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Teknik; Technological sciences; Fysik; Physics; Combustion; Gas turbine; HCCI; Engine; High-Speed; Thermographic phosphors; PLIF; LIF; Laser Diagnostics; Laser-Induced Fluorescence; Laser technology; Laserteknik; Motors and propulsion systems; Motorer; framdrivningssystem;

   Sammanfattning : In the work presented in the thesis, different laser spectroscopic techniques were utilized for measurement of species concentrations, as well as for surface thermometry. Experiments were conducted in various combustion environments, ranging from laboratory burners to truck-sized internal combustion (IC) engines, gas turbine combustors and a full-size aircraft turbofan engine. LÄS MER

3. 32. Symbolic Methods and Tools for Discrete Event Dynamic Systems

   Författare :Johan Gunnarsson; Lennart Ljung; Linköpings universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Decision diagrams; Polynomial relational representation; Landing gear controller;

   Sammanfattning : The interest in Discrete Event Dynamic Systems (DEDS) has increased during the last years, due to the lack of methods and tools that are capable of handling the complexity of problems and tasks present in industry today. In this thesis we will consider a framework based on relations over finite domains. LÄS MER

4. 33. Detached Eddy Simulation for Aerospace Applications

   Författare :Gonzalo Montero Villar; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Evolutionary algorithms; Synthetic turbulence; Chorochronic; POD based phase-lag; Sliding grid; Nozzle flow separation; Hybrid RANS LES; Phase-lagged boundary conditions; Stochastic optimization; CFD; LODI;

   Sammanfattning : With the continuous growth in air traffic that we see nowadays, comes an increase in the requirements needed to be satisfied in order to certify an aircraft for operation. These stricter regulations affect aspects such as CO2 emissions, sound pollution and so on, pushing manufacturers to aim for lighter, more efficient, more robust designs. LÄS MER

5. 34. Signal Processing for Radar with Array Antennas and for Radar with Micro-Doppler Measurements

   Författare :Svante Björklund; Mats Pettersson; Ingvar Claesson; Ulrich Nickel; Blekinge Tekniska Högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; radar; signal processing; array antenna; subarray; clutter; jamming; interference; direction of arrival estimation; security; micro-Doppler; feature extraction; classification;

   Sammanfattning : Radar (RAdio Detection And Ranging) uses radio waves to detect the presence of a target and measure its position and other properties. This sensor has found many civilian and military applications due to advantages such as possible large surveillance areas and operation day and night and in all weather. LÄS MER

7. 35. L’émergence de la compétence collective en contextes extrêmes : le cas des équipes de secours en montagne

   Författare :Virginie Fernandez; Yvonne Giordano; Sabrina Loufrani-Fedida; France Nice Université Côte d'Azur; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Collective competence; extreme contexts; qualitative study; Contextes extrêmes; Compétence collective; företagsekonomi; Business Studies;

   Sammanfattning : Risky, emergency or disruptive contexts are all qualifiers used for so-called "extreme" contexts that are usually characterized by uncertainty, time pressure and the presence of risks and / or dangers. Many authors and practitioners believe that they have now become the new normal for many organizations. LÄS MER