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High Angle of Attack Velocity Vector Rolls
IFAC Proceedings Volumes, 1994Abstract This paper presents the design of a flight control system for performing the velocity vector roll maneuver at high angles of attack. A six degree of freedom model is developed, and the multiple-input multiple-output Quantitative Feedback Theory (QFT) robust control design method is used to treat both the inherent system nonlinearities and ...
K.E. Boyum, M. Pachter, C.H. Houpis
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The Mathematical Gazette, 1969
In many books on elementary mechanics, it is assumed that velocity is a vector quantity on the grounds that it has magnitude and direction. It is, however, very far from obvious that these are sufficient reasons and a rather more thorough investigation of the nature of velocity may provide not only a clearer idea of what velocity is but may also clear ...
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In many books on elementary mechanics, it is assumed that velocity is a vector quantity on the grounds that it has magnitude and direction. It is, however, very far from obvious that these are sufficient reasons and a rather more thorough investigation of the nature of velocity may provide not only a clearer idea of what velocity is but may also clear ...
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Rigid velocities compatible with five image velocity vectors
Image and Vision Computing, 1989Abstract The problem of obtaining rigid velocities compatible with a given set of image velocity vectors is algebraic in that it depends on the solution of simultaneous polynomial equations. We show that five image velocity vectors yield two quartic polynomial constraints on the translational part of the rigid velocity, and that of the 16 common ...
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Guidance, Navigation, and Control Conference, 1996
This paper is devoted to the challenging problem of high angle of attack and maneuvering flight control, with special emphasis on the critical velocity vector roll maneuver. The development of a flight control system for maneuvering flight, i.e., high amplitude maneuvers, requires careful modeling.
M. Pachter, P. Chandler
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This paper is devoted to the challenging problem of high angle of attack and maneuvering flight control, with special emphasis on the critical velocity vector roll maneuver. The development of a flight control system for maneuvering flight, i.e., high amplitude maneuvers, requires careful modeling.
M. Pachter, P. Chandler
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Anticipating adolescent growth vectors and velocities
American Journal of Orthodontics, 1972Abstract Growth potency can be evaluated by the hand-wrist radiograph, standards of height-weight values, and serial cephalometric observation radiographs. Experience adapts accepted predictive charts, such as those of Bayer and Bayley, to the norms of any ethnic population for the individual patients under treatment.
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Vector of Coordinates, Velocities and Accelerations
2015This chapter describes the how the vector of coordinates are defined in the formulation of spatial multibody systems. For this purpose, the translational motion is described in terms of Cartesian coordinates, while rotational motion is specified using the technique of Euler parameters. This approach avoids the computational difficulties associated with
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Velocity Gradient Method of Lyapunov Vector Functions
Proceedings of the 2019 the 5th International Conference on e-Society, e-Learning and e-Technologies - ICSLT 2019, 2019In this paper, a new approach for constructing the Lyapunov function is considered. Lyapunov function is obtained as a vector function on the basis of the geometric interpretation of the Lyapunov's second method and, its antigradient is given by the velocity vector components (the right-hand side of the state equation) of the system. The stability area
Mamyrbek Beisenbi +3 more
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Multizone reproduction by matching the velocity vectors
The Journal of the Acoustical Society of America, 2023This paper proposes a velocity-based multizone reproduction method, which reproduces the velocity vectors throughout each listening zone. Velocity vectors are related to the localization of sound below 700 Hz. Previous work considered reproducing the velocity vectors at sweet spots or on the listening zone’s boundary, and usually involved measurements ...
Jiarui Wang +3 more
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Examples of Vector Velocity Imaging
2011To measure blood flow velocity in vessels with conventional ultrasound, the velocity is estimated along the direction of the emitted ultrasound wave. It is therefore impossible to obtain accurate information on blood flow velocity and direction, when the angle between blood flow and ultrasound wave approaches 90°.
Peter M. Hansen +4 more
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Examples of In Vivo Blood Vector Velocity Estimation
Ultrasound in Medicine & Biology, 2007In this paper, a case study of in-vivo blood vector velocity images of the carotid artery are presented. The transverse oscillation (TO) method for blood vector velocity estimation has been used to estimate the vector velocities. The carotid arteries of three healthy volunteers are scanned in-vivo at three different positions by experienced ...
Udesen, Jesper +3 more
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