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 12 of 12 for “"forced oscillation"”.
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Analysis of various forced oscillation techniques for obtaining dynamic stability derivatives
… dynamic test systems, a single degree of freedom forced oscillatory rig, which gives the exact sinusoidal displacement of the model and also adjustable to the existing curved and rolling flow facilities, is described with its data acquisition/reduction.
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Development of Methods for Improved Data Integrity and Efficient Testing of Wind Tunnel Models for Dynamic Test Conditions in Unsteady and Nonlinear Flight Regimes
… of fluctuating loads and moments. Additionally, forced oscillation test techniques, one of the primary tools used to develop dynamic models, do not currently provide estimates of the uncertainty of the results during an oscillation cycle. Further, in testing models across a range of flight …
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A vortex panel method for potential flows with applications to dynamics and controls
… is coupled with dynamic equations of motion. Forced oscillation tests are conducted on flat rectangular and delta wings. Dynamic tests are performed to predict wing rock of a slender delta wing restricted to one degree of freedom in roll. The aerodynamic/dynamic model is coupled with control …
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Data analysis in respiratory medicine : model selection and classification methods applied to clinical diagnostics
… first exposes the clinical problem of incomplete forced expiration manoeuvres, an inconvenience that frequently arises when the lung function of patients with impaired respiration is investigated. We developed a model-based approach that provides estimates of vital capacity by analysing …
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A dynamic model for aircraft poststall departure
… stability derivatives by analytically simulating forced oscillation test procedures.
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Damping Effects of Drogue Parachutes on Orion Crew Module Dynamics
… are not currently modeled in the simulations. A forced oscillation test of the CM with parachutes was conducted in the NASA LaRC 20-Ft Vertical Spin Tunnel (VST) to gather additional data to validate and refine the Apollo legacy drogue model. A second loads balance was added to the original Orion …
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THE IMPACT OF ACROLEIN ON LUNG FUNCTION: EXPLORATION OF NITROSATIVE STRESS-INDUCED LUNG INJURY AND THERAPEUTIC APPROACHES
… pulmonary testing via the Flexivent to conduct Forced Oscillation Techniques (FOT) with methacholine nebulization to understand the dynamic airway responsiveness as well as Negative Pressure Forced Expiration (NPFE) to determine the static airway properties to determine lung compliance. In …
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Computational Prediction of Stall Aerodynamics and Evaluation of Ground Effect for a Generic Transport Aircraft
… tests using different methods such as static, forced oscillation and rotary balance tests. The role of Computational Fluid Dynamics (CFD) methods in generating aerodynamic data for extended flight envelope has a significant potential in improving delity of aerodynamics models and reducing the …
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TUNING 2-BY-2 MULTI-LOOP PI CONTROLLERS USING RELAY FEEDBACK
… multi-loop PI controllers can be tuned from the oscillations in such a system will be discussed. A multivariable system which is placed under multi-loop relay feedback control can display one of three possible modes of oscillations. The first mode consists of identical relay outputs which are …
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Early determinants of lung function in African infants
… hexafluoride multiple breath washout and the forced oscillation technique. Information on antenatal exposures was collected using questionnaires and urine cotinine. Household benzene was measured antenatally. The chapters of the thesis are presented as published manuscripts that describe the …
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Unsteady Aerodynamic and Aeroelastic Analysis of Flapping Flight
… validated with well known flow problems such as forced oscillation of a cylinder, a heaving airfoil, a moving indentation channel, and a hovering fruitfly. The performance of flapping flight is analyzed using Large Eddy Simulation (LES) for a wide range of Reynolds numbers and under various …
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Hmotové modely hlasivek buzené harmonicky
Bakalářská práce náleží do oblasti bioakustiky a biomechaniky hlasu. Zabývá se modelováním jednoduchých analytických modelů hlasivek, konkrétně jejich vynuceným kmitáním pomocí budicích sil s harmonickým průběhem. Součástí práce je i anatomie dýchacího a hlasového ústrojí a popis základních teorií …