Results 31 to 40 of about 40,293 (167)
A new pitch angle adaptive control design
2014 International Conference on Unmanned Aircraft Systems (ICUAS), 2014 This paper presents a new pitch angle adaptive control design based on the pitch rate following of a desired trajectory that ensures closed loop satisfactory performance. The pitch rate is under adaptive predictive (AP) control, as previously seen in the literature, but its desired trajectory is produced by a guidance block within a global guidance ...
Viúdez Moreiras, Daniel +2 more
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Pitch angles of distant spiral galaxies [PDF]
Astronomy Letters, 2011 9 pages, 6 ...
Savchenko, S. S., Reshetnikov, V. P.
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International Journal of Electrical Power & Energy SystemsAccurately tracking power command while minimizing pitch action under safe operational constraints remains one of the key challenges in active power control (APC) research of wind turbines (WTs).
Huimin Gu +5 more
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Antarctic Record, 1980 Pitch angle distributions of auroral electrons with energies greater than 40 keV measured by three sounding rockets (S-210JA-20, -21 and S-310JA-2), which were launched from Syowa Station, Antarctica, during moderate disturbances of auroral activity, are
Masahiro KODAMA +4 more
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Pitch angle dispersion of ion injections [PDF]
Journal of Geophysical Research: Space Physics, 2000 Substorm‐injected particles are time dispersed with pitch angle such that low pitch angle particles arrive earliest on the dayside at geosynchronous orbit, opposite the sense predicted by drift in a dipole field. In contrast to energy dispersion which is well understood, pitch angle dispersion of particle injections has not been quantitatively ...
B. J. Anderson, K. Takahashi
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Transcription and the Pitch Angle of DNA
, 2012 The question of the value of the pitch angle of DNA is visited from the perspective of a geometrical analysis of transcription. It is suggested that for transcription to be possible, the pitch angle of B-DNA must be smaller than the angle of zero-twist. At the zero-twist angle the double helix is maximally rotated and its strain-twist coupling vanishes.
Olsen, Kasper W., Bohr, Jakob
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Direct Evidence for Electron Pitch Angle Scattering Driven by Electrostatic Cyclotron Harmonic Waves
Geophysical Research LettersElectrostatic Cyclotron Harmonic (ECH) waves have been considered a potential cause of pitch angle scattering of electrons in the energy range from a few hundred eV to tens of keV.
S. Kurita +13 more
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Energy Exploration & Exploitation, 2022 Wind energy has been developed and is widely used as a clean and renewable form of energy. Among the existing variety of wind turbines, variable-speed variable-pitch wind turbines have become popular owing to their variable output power capability.
Ya-Jun Fan, Hai-tong Xu, Zhao-Yu He
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Aerospace, 2023 Flow behavior and aerodynamic performance of a small-scale joined-wing unmanned aerial vehicle (UAV) was studied experimentally and numerically under various pitch and yaw angle combinations in subsonic flow conditions.
Tze How New +4 more
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Nongyroresonant Pitch Angle Scattering
The Astrophysical Journal, 1999 The spatial transport of charged particles, in a turbulence of slab Alfven waves and isotropic fast magnetosonic waves, is determined by the pitch angle scattering of these particles. For pitch angle cosines μ larger than the Alfven speed over the particle speed, this pitch angle scattering is provided by either gyroresonance with the Alfven waves or ...
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