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 8 of 8 for “"Rolling Moment"”.
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A simplified vortex sheet roll-up method for formation flight
… of a wake on the benefits in induced drag and rolling moment experienced by a close formation of two elliptically loaded wings. The roll-up of the leading wake is computed in the Trefftz plane using a linear vorticity panel method. A smoothing parameter as well as a truncation of the vortex …
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Evaluating the Aerodynamic Performance of MFC-Actuated Morphing Wings to Control a Small UAV
… models were used to predict<br />deflections and rolling moment coefficients. Different configuration parameters were then<br />varied to quantify their effect. The comparisons included MFC location, number of MFCs,<br />material substrate, and wing thickness. A prototype wing was then built and …
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Dynamic Modeling of a Supersonic Tailless Aircraft with All-moving Wingtip Control Effectors
… model began with determining the necessary rolling and yawing moment coefficients necessary to meet the rest of the chosen dynamic response requirements. These coefficients were then used to find the corresponding all-moving tip deflections. The CFD data showed that even at small all-moving …
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Dynamics and Control of Morphing Aircraft
… asymmetric wing extension is used to effect the rolling moment. An evaluation of the variable span aircraft is performed in the context of bank-to-turn guidance in which an input-output control law is implemented.
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Computational Simulations of a Non-body of Revolution Ellipsoidal Model Utilizing RANS
… good agreement for ahead and pitched forces and moments. Straight ahead skin friction values also showed good agreement, providing even improved agreement over an LES model which utilized wall functions. Yaw turn conditions also showed good agreement for roll angles up to 10 degrees. Steady …
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Optimum Spanloads Incorporating Wing Structural Considerations And Formation Flying
… constraints for lift coefficient, pitching moment coefficient and wing root bending moment. This wing structural constraint has been introduced such that wing geometry is not changed but the modified load distributions can be related to wing weight. Changes in wing induced drag and weight …
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An Aerodynamic Model for Use in the High Angle of Attack Regime
… into panels and model the local forces and moments. Included in this technique is the introduction of a new state variable, a separation state variable which characterizes the separation for each panel. This new variable is governed by a first order differential equation. Taylor series …
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Dynamics and control of robotic aircraft with articulated wings
… dynamic CG location and the changing moment of inertia. We show that symmetric dihedral con guration, along with a conventional horizontal tail, can be used to control flight speed and flight path angle independently of each other. This characteristic is very useful for initiating an …