Ex. 1780. A closed-loop system has sustained oscillations (i.e. constant
amplitude) with a period of 88 seconds when the gains are:
proportional=22, integral=0, and derivative=0. Determine the ideal-
PID gains Kp, Ki (minutes^-1), Kd (minutes) using the Ziegler-Nichols
method. Also determine the standard-PID values which are commonly used
in industry, such as LabVIEW: Kc, Ti (min), Td (min). ans:6
Ex. 1780. A closed-loop system has sustained oscillations (i.e. constant amplitude) with a period of 88 seconds wh
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