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!

  • Irina, 23
    Russian Federation, Saransk
    Native language: Russian
    Foreign language: English, Spanish, French
    Hello there! My name is Irina. I am a girl from Russia who is absolutely crazy about learning foreign languages, meeting new people all over the world, travelling and getting to know new cultures, traditions and customs. :) What is more, I am nice, honest, sincere, I hate lies!>.< Hola a todos! Me llamo Irina. Soy una chica rusa a quien le gusta aprender idiomas, conocer gente nueva, viajar por el mundo y conocer nuevas culturas , costumbres y tradiciones. Ademas soy amable, honesta, sincera, no me gustan las mentiras.
    Irina
  • Claudia Marlene, 24
    Cuba, La Habana
    Native language: Spanish
    Foreign language: English, Chinese Simplified
    Claudia Ma...
  • maria victoria , 55
    Uruguay, Montevideo
    Native language: Korean
    Foreign language: Korean
    maria vict...
  • princesita bella, 16
    Colombia, Bogotã¡
    Native language: Spanish
    Foreign language: Spanish
    princesita...
  • mayra, 16
    Colombia, Barranquilla
    Native language: Spanish
    Foreign language: Spanish
    mayra
  • porky, 36
    Peru, Lima
    Native language: Spanish
    Foreign language: Russian
    porky
  • AndreaK, 25
    Argentina, Buenos Aires
    Native language: Spanish
    Foreign language: English, Portuguese
    AndreaK
  • angie, 19
    Colombia, Monteria
    Native language: Spanish
    Foreign language: Spanish
    angie
  • cristal, 40
    Dominican Republic, Santo Domingo
    Native language: Spanish
    Foreign language: English
    cristal
  • katy, 19
    Peru, Lima
    Native language: Spanish
    Foreign language: Spanish
    katy
  • Laura, 9
    Mexico, Mexico
    Native language: Spanish
    Foreign language: English
    Laura
  • Pavel Zhbankov, 25
    Chile, Valdivia
    Native language: Spanish, Russian
    Foreign language: Portuguese, English, Italian, French
    Pavel Zhba...
  • Maria , 19
    Costa Rica, Santa Cruz, Guanacaste
    Native language: Spanish
    Foreign language: Spanish
    Maria
  • Jonathan Cevallos, 20
    Ecuador, Jipijapa
    Native language: Spanish
    Foreign language: Spanish
    soy un chico respetuoso, amigable, muy sociable con las demás personas, aunque a veces soy de carácter fuerte aunque no es de que preocuparse, porque eso lo controlo fácilmente y me gusta conocer gente nueva.
    Jonathan C...
  • Maycoll Mong, 35
    Venezuela, Maracay
    Native language: Spanish
    Foreign language: English
    Maycoll Mo...
  • alexaner, 31
    Dominican Republic, Santo Domingo
    Native language: Spanish
    Foreign language: English
    alexaner
  • yesenia perez wlloa, 34
    Dominican Republic, Santo Domingo
    Native language: Spanish
    Foreign language: Spanish
    yesenia pe...
  • Fernando Prieto, 70
    Mexico, San Miguel De Allende
    Native language: Spanish
    Foreign language: English
    Physician. Graduated 44 years ago. Former internist and a lung- heart specialist. At present, medical director at a nursing home - assisted living facility near San Miguel Allende, Guanajuato, Mexico. Love reading, languages, watching night sky, biking. I am sociable and like people of all ages.
    Fernando P...
  • Arge, 61
    United States, Mesa
    Native language: Spanish
    Foreign language: English
    Arge
  • Tara, 30
    Vietnam, Ha Noi
    Native language: Vietnamese
    Foreign language: Spanish
    Tara