Introduction
There is no industry which doesn’t include some kind of boiler in its
structure. A boiler is a closed vessel in which water or other fluid is heated.
The heated or vaporized fluid exits the boiler for use in various processes or
heating applications. Because of boilers importance there is a strong need
to control boilers temperature by some control system. Such control
systems include some heat sensors, comparators and signal generators.
These control systems act differently for different temperature and stability
conditions. There is always a need to study their behavior before
incorporating control system to practical. Behavioral study of temperature
control system include dependence of its settling time (time required to
reach steady state) and frequency response over systems parameters
which include proportionality gain, systems max power etc.
Objective
Over main objective is to study the optimization of following
performance parameters of a PID temperature control system
Time to reach the steady state
Deviation from steady state value
Delay in the output signal
Procedure
At first gain of the system was reduced to 1 for the tuning purpose.
After this open loop response of system was plotted using plotter.
After tuning, loop was closed and gain was adjusted to unity. Closed
loop response at unity gain was plotted using plotter.
Gain was increased to 3, and again close loop response was plotted
on graph paper.
Gain was increased to 20 and then close loop response was plotted
using plotter.
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