Phase margin is equal to – McqOptions

MCQOPTIONS

1.	Phase margin is equal to
A.	180¬∞ - phase lag
B.	phase lag - 180¬∞
C.	phase lag + 180¬∞
D.	phase lag + 90¬∞
Answer» B. phase lag - 180¬∞

Discussion

No Comment Found

Related MCQs

A proportional controller with a gain of is used to control a first order process. The offset will increase, if
The second order system with the transfer function has a damping ratio of
The transfer function for a PID controller is (where, τ is the integral (reset) time and τ is the derivative time.)
For an input forcing function, () = 2, the Laplace transform of this function is
The characteristic equation for the control system with a closed loop transfer function /1 + is given by 1 + = 0. The characteristic equation for the control system
The offset introduced by proportional controller with gain in response of first order system can be reduced by
Operating range of a temperature measuring instrument is 800 to 1600°C. It could be a/an __________ pyrometer.
The open loop transfer function of a process is . In the root locus diagram, the poles will be at
The time constant of a unity gain, first order plus time delay process is 5 min. If the phase lag at a frequency of 0.2 rad/min is 60°, then the dead time (in minutes) is
Which of following error integral is considered as the best criterion in controller settings ?