Fuzzy Logic has
played a pivotal part in this age of rapid technological development .In this
paper we have elaborated on the automation process used in a washing machine.
This paper has focused on the two subsystems of the washing machine namely the
sensor mechanism and the controller unit. It also discuss on the use of
singletons for fuzzy sets. This paper also highlights the use of a fuzzy
controller to give the correct wash time. The use of fuzzy controller has the
advantage of managing time, increasing equipment effiency and diagnosing
malfunctions.
Classical feedback
control theory has been the basis for the development of simple automatic
control systems .It is easily comprehensible principle and relatively simple
implementation has been the main reason for its wide applications in industry.
Such fixed-gain feedback controllers are insufficient, however to compensate
for parameter variations in the plant as well as to adapt to changes in the
environment. The need to overcome such problems and to have a controller well-tuned
not just for one operating point for a whole range of operating points has
motivated the idea of an adaptive controller.
HOW
DOES FUZZY LOGIC WORK?
In order to
illustrate some basic concepts in fuzzy logic consider a simplified example of
a thermostat controlling a heater fan .The room temperature detected through a
sensor is input to a controller which outputs a control force to adjust the
heater fan speed.
Fuzzy logic is a
powerful problem-solving methodology with a myriad of application in embedded
control and information processing. Fuzzy provides a remarkable simple way to
draw definite conclusions from vague, ambiguous or imprecise information. In a
sense, fuzzy logic resembles human decision making with its ability to work
from approximate data and find precise solutions. Fuzzy Logic has been gaining
increasing acceptance during the past few years. There are over two thousand
commercially available products using Fuzzy Logic, ranging from washing
machines to high speed trains. Several manufacturers in the automotive industry
are using fuzzy technology to improve quality and reduce development time. In
aerospace, fuzzy enables very complex real time problems to be tackled using a
simple approach. In consumer electronics, fuzzy improves time to market and
helps reduce costs. In manufacturing , fuzzy is proven to be invaluable in
increasing equipment efficiency and diagnosing malfunctions. Thus we can see
that fuzzy plays an important role in the present world in various fields.
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