# Comparing Controller Tuning Methods

## Aims

The aims of this experiment are:

- To analyse an open loop response to obtain process parameters
- To analyse a closed loop response to obtain the ultimate gain and
period
- To evaluate controller parameters using 5 different methods
- To compare the values obtained above with respect to how well the
process is controlled

## Theory

There are five theory sections corresponding to the five different
methods of obtaining controller parameters:

All the above theory is covered in
Module 2.2 - Controller Design and System Modelling
and
Module 4 - Futher Controller Design

## Procedure

In this simulation each of the above tuning methods are taken in turn
and used to determine the controller parameters for a given process.
Firstly the Open Loop Response is given. Once the process parameters
are obtained this gives the ZN Open Loop parameters. Also from the open
loop response the fractional dead time can be evaluated and thus the
Controller Paramter Correlations can be used.

Next a java applet is given which models the process with a proportional
only controller. Thus the ZN Closed Loop Response Method and the Damped
Osciallation Method can be used.

The next java applet is one which models a Relay Based Controller to
determine the controller parameters using this method.

Finally there is a java applet which models the process with a
proportional integral controller so that all the evaluated controller
values can be tested and compared.

## Processes

Three different processes are given and can be worked through in any
order.

Questions are given throughout the exercises to guide you through the
experiment.

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