A How much additional positive phase should we request from

A. How much additional positive phase should we request from a DT PID controller with a standard selection of the sampling rate at 6 samples-per-rise-time (assuming ZOH introduces a half-sample delay, and bandwidth is 1.5 times the cutoff frequency):

a. about 6 deg

b. about 12 deg

c. no additional phase

d. depends on PI vs PID

e. none of the above

Explain it.

Solution

it depends PI and PID CONTROLLERS