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!

  • francia, 20
    Dominican Republic, Santo Domingo
    Native language: Spanish
    Foreign language: Spanish
    francia
  • may, 22
    Colombia, Quibdo
    Native language: Spanish
    Foreign language: English
    may
  • Nata
    Ukraine, Киев
    Native language: Russian
    Foreign language: English
    Nata
  • jean pierre, 18
    Ecuador, Portoviejo
    Native language: Spanish
    Foreign language: English
    futuro bachiller , objetivo es promocionar el turismo de pedernales . mi hobbies es jugar futbool
    jean pierr...
  • Emin, 31
    Azerbaijan, Baku
    Native language: Russian, Turkish
    Foreign language: English
    Emin
  • carlo jose morel, 23
    Dominican Republic, Santo Domingo
    Native language: Spanish
    Foreign language: English
    carlo jose...
  • victor, 35
    Dominican Republic, Santo Domingo
    Native language: Spanish
    Foreign language: English
    victor
  • Jose, 35
    Dominican Republic, Santiago
    Native language: Spanish
    Foreign language: English
    Jose
  • nurdin_doc, 35
    Kyrgyzstan, Bishkek
    Native language: Russian
    Foreign language: English
    nurdin_doc
  • loren marroquin, 24
    Guatemala, Guatemala City
    Native language: Spanish
    Foreign language: Spanish
    loren marr...
  • TATJANAR777, 50
    Belgium, Bilzen
    Native language: Russian
    Foreign language: Dutch
    TATJANAR77...
  • Patrick
    Canada, Quebec
    Native language: French
    Foreign language: English
    Patrick
  • maria victoria , 55
    Uruguay, Montevideo
    Native language: Korean
    Foreign language: Korean
    maria vict...
  • Susana Silva, 59
    Ecuador, Quito
    Native language: Spanish
    Foreign language: English
    Odontóloga, deseo aprender inglés, soy ecuatoriana . Realmente tengo un nivel de Inglés muy básico. Saludos, Susana
    Susana Sil...
  • Luzmary, 19
    Venezuela, San Carlos
    Native language: Spanish
    Foreign language: Spanish
    Luzmary
  • Jessica Mendoza, 23
    Venezuela, Mérida
    Native language: Spanish
    Foreign language: Spanish
    Jessica Me...
  • Настя Бадакина, 17
    Russian Federation, Bryansk
    Native language: Russian
    Foreign language: English
    Настя Бада...
  • Roge el goloso, 23
    Panama, Panama
    Native language: Spanish
    Foreign language: Spanish
    estudio en la umecit; toy soltero y en buska ; soy satirasis pero bien goloso.
    Roge el go...
  • Mixtli Vizcaino, 53
    Mexico, Guadalajara
    Native language: Spanish
    Foreign language: English
    Nací en la ciudad de Guadalajara y el idioma inglés aunque no me atrae mucho, considero es necesario solo como una herramienta de comunicación básico. Lo he estudiado en diferentes etapas de mi vida desde chico. Ademas cuento con parientes en Canadá y E. U. A. Quiero mejorar en el inglés por lo menos un 30% más.
    Mixtli Viz...
  • anyela maria, 18
    Colombia, Cali
    Native language: Spanish
    Foreign language: Spanish
    anyela mar...