temperature and water level control using fuzzy logic

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This i have undertaken for my engineering 3rd year miniproject. i am new to the concept of fuzzy. please suggest where and what should i start with?
can any1 explain in brief how should the final system work? with example.

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download the hc12a4 manual from freescale. Those things have a dozen fuzzy instructions in assembler and the manual tells you how they work.

Imagecraft compiler user

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sunilmac,

I'm not sure what the requirements are, but are you trying to build an analog-based logic system to control the temp/water level or are you trying to do it using an avr? I think it should be relatively simple using a flow like:
temp is very cold then xxx off
temp is cold then xxx low
temp is medium then xxx medium
temp is hot then xxx high
temp is very hot then xxx very high

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does this mean, we have to take inputs from user on whether temp is 'hot', 'very hot'? then depending on the frequency of occurrence of specific input, temperature will be controlled?
i am trying to do the project using avr.

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For basic understanding of fuzzy logic control systems I have found no better book than Fuzzy Control by Passino and Yurkovich:

http://www.amazon.com/Fuzzy-Cont...

This is a great 'first steps' book. Good luck!

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Hey thanks a lot, the book by Passino n Yurkovich is really a nice one. cleared all air about fuzzy.
any suggestions about actual implementation of things? not the microcontroller, others like sensing methods and controlling mechanisms etc?

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Quote:
sensing methods

How to measure a liquid level is up to you. There are many approaches, limited only by your ingenuity:

Ultrasonic distance measuring
weight of tank
Inflow - outflow
light transmission, (transmisivity (spelling?))
Thermal dilution
clear tube with photo sensors
pressure sensor connected to bottom of tank
potentiometer with arm connected to a float
potentiometer with control connected to a pulley, to a float, (or a rotary encoder)
video processing of red laser aimed at angle into tank
timing the splash with a microphone when something is dropped into the tank, (more water, or something else)
the list goes on an on...

Good Luck with your project.

JC

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thank u very much

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how can i implement floating value calculations on ATMEGA microcontroller?
i am thinking of elevating every floating parameter by 100 (e.g upremise * 100). any other solution? please help.

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Fuzzy logic works much better on the PIC processors, as you will discover if you have the chance to use one :?

When in the dark remember-the future looks brighter than ever.   I look forward to being able to predict the future!