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 7 of 7 for “"Hinge Moment"”.
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Flight envelope protection using flap hinge moment measurement
… investigation of the sensitivity of flap hinge moment to airfoil surface contamination was conducted at the University of Illinois at Urbana-Champaign Aerodynamics Research Lab. Tests were conducted on two airfoil models, an NACA 3415 and an NACA 23012, at Reynolds numbers of 1.8 × 106 and …
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Performance of an airfoil with a power-saving, tab-assisted flap system
… flap and tab angle combinations were tested. Hinge moment measurements were taken for both the flap and tab for comparison between the two cases. In addition; lift, drag and moment measurements along with surface pressures were acquired to aid in the analysis of the concept and provide flow …
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Control Power Optimization using Artificial Intelligence for Hybrid Wing Body Aircraft
… aircraft concepts for minimizing control power, hinge moments, and actuator forces, while keeping the system weights within acceptable limits. The main objective is to develop a proof-of-concept process suitable to demonstrate the potential of using neurocomputing for optimizing actuation power …
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Inflight Characterization of Aircraft Icing
… of the aircraft trim, aerodynamic hinge moment sensing, and an estimate of the flight-dynamics excitation. Two aspects of the icing characterization are novel: (i) real-time Hinfinity parameter identification of the flight dynamics, and (ii) preprocessing and assimilation of the …
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Unsteady modes in the flowfield about an airfoil with a leading-edge horn-ice shape
… example to improve the predictive qualities of a hinge-moment-based stall prediction system. This improvement in the predictive qualities was performed by identifying the intermittent signature of the low-frequency mode in the wavelet transform of the hinge moment coefficient, which allowed the …
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Numerical simulation of feedback control of aerodynamic configurations in steady and unsteady ground effects
… increases the lift and drag, and makes the hinge-moment less negative. Proportional and rate control laws were used in a feedback system to control pitch. One set of gains was used in and out of ground effect. For the same control input, the pitch angle responds faster and overshoots more …
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Control Power Optimization using Artificial Intelligence for Forward Swept Wing and Hybrid Wing Body Aircraft
… control surfaces that can result in large hinge moments, high actuation power demands, and large actuator forces/moments. Also, there is no unique relationship between control inputs and the aircraft response. Distinct sets of control surface deflections may result in the same aircraft …