positive stability

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• positive stability — noun : the tendency of a ship to return to previous position when inclined …   Useful english dictionary

• Limit of Positive Stability — or LPS is the angle at which a boat will no longer stay upright but will capsize becoming inverted. It is also known as the Angle of Vanishing Stability or AVS. For example, if a boat with an LPS of 120 degrees rolls past this point it will… …   Wikipedia

• Stability derivatives — are a means of linearising the equations of motion of an atmospheric flight vehicle so that conventional control engineering methods may be applied to assess their stability.The dynamics of atmospheric flight vehicles is potentially very… …   Wikipedia

• Positive feedback — Alarm or panic can spread by positive feedback among a herd of animals to cause a stampede. Positive feedback is energy taken from the output of a system and reapplied to the input, which is phase congruent with the input signal. A system… …   Wikipedia

• Positive-definite function — In mathematics, the term positive definite function may refer to a couple of different concepts. Contents 1 In dynamical systems 2 In analysis 2.1 Bochner s theorem 2.1.1 Applications …   Wikipedia

• Positive Affect Negative Affect Scale — The PANAS is a scale measuring emotions (PANAS = Positive Affect Negative Affect Scale). The emotions measured can be general and also specific ones (i.e. at a cretin moment or event). Therefore, the PANAS can be used to measure emotions in the… …   Wikipedia

• Positive law — Law Law (l[add]), n. [OE. lawe, laghe, AS. lagu, from the root of E. lie: akin to OS. lag, Icel. l[ o]g, Sw. lag, Dan. lov; cf. L. lex, E. legal. A law is that which is laid, set, or fixed; like statute, fr. L. statuere to make to stand. See… …   The Collaborative International Dictionary of English

• Longitudinal static stability — is important in determining whether an aircraft will be able to fly as intended. Static stability As any vehicle moves it will be subjected to minor changes in the forces that act on it, and in its speed. * If such a change causes further changes …   Wikipedia

• Lyapunov stability — In mathematics, the notion of Lyapunov stability occurs in the study of dynamical systems. In simple terms, if all solutions of the dynamical system that start out near an equilibrium point x e stay near x e forever, then x e is Lyapunov stable.… …   Wikipedia

• Relaxed stability — In aviation, relaxed stability is the tendency of an aircraft to change its attitude and angle of bank on its own accord. An aircraft with relaxed stability will oscillate in simple harmonic motion around a particular attitude at an increasing… …   Wikipedia

• positive static stability — The tendency of an aircraft to return to its original flight attitude after being disturbed by an external force. An aircraft is positively stable if it returns to level flight after it has been disturbed by, for instance, a gust …   Aviation dictionary