Formula to calculate correction couple - Theory of Machines - 1

Q.  Which formula is used to calculate correction couple?
- Published on 06 Aug 15

a. Tc = ml1 (l3 - l2) α
b. Tc = ml1 (l3 - l2) α2
c. Tc = ml1 (l3 + l2) α
d. none of the above

ANSWER: Tc = ml1 (l3 - l2) α

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    Discussion

  • Sravanthi   -Posted on 19 Oct 15
    The difference between torque required to accelerate non dynamically equivalent system and dynamically equivalent system is called as correction couple.

    Let,

    TA be the torque required to accelerate dynamically equivalent system

    TB be the torque required to accelerate non-dynamically equivalent system

    Therefore,

    Correction couple ( TC ) = Torque required to accelerate non-dynamically equivalent system (TB ) - Torque required to accelerate dynamically equivalent system ( TA )

    ( TC ) = m ( k12 – k2) α

    here,

    α = angular acceleration

    k = radius of gyration of dynamically equivalent system.

    k1 = radius of gyration of non dynamically equivalent system.

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