Ziegler Nichols Closed Loop Tuning CalculatorDescription| How it works
The closed loop Ziegler Nichols tuning method is widely taught in academics, but has limited practical application due to risks of driving a process into continuous cycles. This app makes it easy to calculate the closed loop tuning parameters by using the open loop process parameters (which are safer to obtain), and without the requiring a closed loop test on the process. This app will calculate the tuning parameters for a first order process with delay using the closed loop Ziegler Nichols tuning rules.
Download.xls file (23 KB)
How to use
Key in the first order process parameters (Gain, lag and delay)
into the spreadsheet, the tuning parameters for P only, PI and PID
controllers are obtained. Note that this app requires a minimum
amount of delay. A delay free system will not go into cycles with
only a proportional controller, and hence this method will not work.
If the tuning parameters are not found, the cells show "#VALUE!"
error. Also, the process gain must be scaled (dimensionless).
Lets take an example, we will choose the same process that we used for the Z-N tuning calculations using the Bode plot, that is
Process Gain = 3,
Lag = 2 s, and
Delay = 2 s
The following tuning parameters are obtained:
Also See:PID Loop Simulator
Bode Plot Generator
PI Control of First Order Process
Simulation of On Off Control