critical frequency


critical frequency
i. The frequency at which a critical angle becomes zero. The highest frequency at which vertical reflection is possible.
ii. The frequency corresponding to the resonance frequency of a blade, control surface, or other vibrating or moving structure.
iii. The frequency of a helicopter main-rotor-blade passing at which the whole helicopter resonates on the landing gear.

Aviation dictionary. 2014.

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  • Critical frequency — In telecommunication, the term critical frequency has the following meanings: In radio propagation by way of the ionosphere, the limiting frequency at or below which a wave component is reflected by, and above which it penetrates through, an… …   Wikipedia

  • critical frequency — kritinis dažnis statusas T sritis automatika atitikmenys: angl. critical frequency vok. Grenzfrequenz, f; kritische Frequenz, f rus. критическая частота, f pranc. fréquence critique, f; fréquence d arrêt, f …   Automatikos terminų žodynas

  • critical frequency — kritinis dažnis statusas T sritis Standartizacija ir metrologija apibrėžtis Mažiausias dažnis, kuriam esant tam tikros modos banga gali sklisti perdavimo linija arba bangolaidžiu. atitikmenys: angl. critical frequency vok. kritische Frequenz, f… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • critical frequency — kritinis dažnis statusas T sritis fizika atitikmenys: angl. critical frequency vok. kritische Frequenz, f rus. критическая частота, f pranc. fréquence critique, f …   Fizikos terminų žodynas

  • waveguide critical frequency — ribinis bangolaidžio dažnis statusas T sritis Standartizacija ir metrologija apibrėžtis Ribinis dažnis, ribojantis bangolaidžiu galinčių sklisti elektromagnetinių bangų dažnių sritį. atitikmenys: angl. waveguide critical frequency; waveguide… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • waveguide critical frequency — ribinis bangolaidžio dažnis statusas T sritis fizika atitikmenys: angl. waveguide critical frequency vok. Grenzfrequenz des Hohlleiters, f rus. предельная частота волновода, f pranc. fréquence de coupure du guide d’ondes, f; fréquence limite du… …   Fizikos terminų žodynas

  • Frequency compensation — In electrical engineering, frequency compensation is a technique used in amplifiers, and especially in amplifiers employing negative feedback. It usually has two primary goals: To avoid the unintentional creation of positive feedback, which will… …   Wikipedia

  • Critical Infrastructure Protection — or CIP is a national program to assure the security of vulnerable and interconnected infrastructures of the United States. In May 1998, President Bill Clinton issued Presidential directive PDD 63 [ [http://www.fas.org/irp/offdocs/pdd/pdd 63.htm… …   Wikipedia

  • Frequency (producer) — Frequency Background information Birth name Bryan Fryzel Born January 4, 1983 …   Wikipedia

  • Critical Inquiry —   Abbreviated title (ISO) Crit. Inquiry …   Wikipedia


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