PID - Ziegler-Nichols Ultimate Tuning
Classical Ziegler-Nichols PID gains from ultimate gain K_u and ultimate period T_u - an on-line tuning recipe for level, pressure and flow loops.
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Formula, assumptions, and limits
| Symbol | Meaning | Unit |
|---|---|---|
| Ultimate (critical) gain | ||
| Ultimate period of oscillation | s |
Source: Ziegler & Nichols - ASME 1942
In short
Classical Ziegler-Nichols PID gains from ultimate gain K_u and ultimate period T_u - an on-line tuning recipe for level, pressure and flow loops.