The first three follow the simple delay-followed-by-first-order-lag model. This is followed by two lags-in-series processes which reflect real processes.
The aim is to go through these one by one and try to decide on the controller parameters which returns the response to it's setpoint value of zero with the minimal of disturbance.
It would also be worthwhile to work through the Introduction to Zeigler Nichols Tuning Methods or at least look at the notes from it if you have not already done so.
Then it is possible to choose a process. As mentioned before there are 5 to choose from ranging in difficulty from ideal delay-followed-by-first-order-lag to more real lags-in-series processes. For more difficult responses, for example like an inverse response, it is necessary to use the Zeigler Nichols Closed Loop Response Method.
Once you have chosen a process you will be shown the open loop response. It is then an easy matter to analyse this and insert the required gain and reset time and obtain the response with control. This step can be repeated as many times as necessary until a thorough understanding of the concepts of control is obtained.
Go To Pre-Experimental Questions