Suspension, Bifilar - definition

Create account
Where to search:
Thesaurus


Dictionaries » The Standard Electrical Dictionary » S »

Suspension, Bifilar - definition



A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
(Non-alphabetical character)

Suspension, Bifilar


Suspension by two vertical parallel fibres, as of a galvanometer needle. The restitution force is gravity, the torsion being comparatively slight and negligible. Leaving torsion out of account the restitution force is (a) proportional to the distance between the threads;. (b) inversely proportional to their length; (c) proportional to weight of the needle or other object suspended; (d) proportional to the angle of displacement. Assume two masses A and B at the end of a weightless rod, suspended by the parallel cords a A, b B. Let the rod be rotated through an angle theta. Consider the cord a A. Its lower end is swung through the angle theta, as referred to the center O; the cord is deflected from the vertical by an angle psi, such that a A tang(psi)= O A 2 sin (theta/2). The component of gravitation tending to restore A to A, acting towards A is equal to m g tan(psi). Its moment around O is equal to (m g tan(psi)) * (O A cos(theta/2). The whole moment of the couple is 2 m g  tan(psi). 0 A. cos(theta/2) = 2 m g (O A2/ a A) 2 sin(theta/2). Cos(theta/2) = 2mgl(OA2/aA) sin(theta). The moment of the restoring force is thus proportional to the sine of the angle of deflection, and the oscillations of such a system are approximately simple harmonic. (Daniell.) If the twisting is carried so far as to cause the threads to cross and come in contact with each other the suspension ceases to be a bifilar suspension, but assumes the nature of a torsional suspension.



Permanent link to this page: http://www.diclib.com/cgi-bin/d1.cgi?l=en&base=en_st_electrical&page=showid&id=2206


Learn foreign languages chatting with us!

  • OCTAVIO SOUZA, 54
    Mexico, Ciudad De México, D.F.
    Native language: Spanish
    Foreign language: French
    Escribo y me gusta escribir cuentos y relatos en español en mis tiempos libres. Por desgracia no me atrevo aún a escribir en francés; aunque en un futuro no muy lejano tal vez lo haga... Es con este fin que me inscribí en este portal. Sobre todo para enriquecer mi léxico, mi vocabulario, etc., auxiliándome, además, en la utilización de los diversos diccionarios y enciclopedias que se manejan en el sitio. Me interesa sobremanera el famoso y consabido Diccionario de María Moliner, que es el que más uso. Soy mexicano y vivo al sur de la Ciudad de México con una fuerte influencia y admiración hacia la cultura y civilización gala desde niño... ¡ Bienvenidos todos aquellos que amen el español y el francés tal como yo! ¡ Bienvenidos todos aquellos que gusten de las culturas y civilizaciones iberoamericanas y, sobre todo, que les plazca y que gusten mi hermoso y maravilloso país!
    OCTAVIO SO...
  • tefany mendezz, 24
    El Salvador, San Salvador
    Native language: Spanish
    Foreign language: French
    tefany men...
  • Lina Marcela Marin, 24
    Panama, Panamá
    Native language: Spanish
    Foreign language: Spanish
    Lina Marce...
  • yugaquibdo, 30
    Colombia, Bogotã¡
    Native language: Spanish
    Foreign language: English
    yugaquibdo
  • Milandrys callaars, 17
    Venezuela, Edo. Nueva Esparta
    Native language: Spanish
    Foreign language: Dutch
    Milandrys ...
  • Joshua Leumas, 25
    Peru, Lima
    Native language: Spanish
    Foreign language: English, French, Italian
    Joshua Leu...
  • lopez mediavilla, 61
    Spain, Burgos
    Native language: Spanish
    Foreign language: English
    lopez medi...
  • Алекса
    Russian Federation, Moscow
    Native language: Russian
    Foreign language: English, Spanish
    Люблю читать, слушать музыку. Люблю хорошие фильмы для подумать. Вообще я интроверт, поэтому с людьми схожусь трудновато, но если таки это случилось, то общаюсь, чему- то учусь и, возможно, что- то даю взамен.
    Алекса
  • bryan anibal vera ruiz , 19
    Ecuador, Guayaquil- Salinas
    Native language: Spanish
    Foreign language: English
    bryan anib...
  • El Killiki Bukki, 43
    Dominican Republic, Santiago
    Native language: Spanish
    Foreign language: English
    El Killiki...
  • jean carlos brea romano, 20
    Venezuela, Guacara
    Native language: Spanish
    Foreign language: English
    jean carlo...
  • loveadut, 25
    United Kingdom, London
    Native language: English
    Foreign language: English
    loveadut
  • Pavel Zhbankov, 25
    Chile, Valdivia
    Native language: Spanish, Russian
    Foreign language: Portuguese, English, Italian, French
    Pavel Zhba...
  • lee sakura, 19
    Mexico, Mexico
    Native language: Spanish
    Foreign language: Spanish
    lee sakura
  • adriana, 16
    Venezuela, Maracaibo
    Native language: Spanish
    Foreign language: Spanish
    adriana
  • THE_RAFY, 19
    Dominican Republic, Santo Domingo
    Native language: Spanish
    Foreign language: English
    THE_RAFY
  • Elizabeth Henriquez, 39
    Honduras, La Ceiba
    Native language: Spanish
    Foreign language: English
    Elizabeth ...
  • Susodicho, 30
    Cuba, La Habana
    Native language: Spanish
    Foreign language: French
    Susodicho
  • adriana, 20
    Peru, Lima
    Native language: Spanish
    Foreign language: Spanish, Spanish
    adriana
  • pedro , 21
    Dominican Republic, Sna Cristobal
    Native language: Spanish
    Foreign language: Spanish
    pedro