# What is defuzzification and why is it required?

Table of Contents

## What is defuzzification and why is it required?

Defuzzification is the process of obtaining a single number from the output of the aggregated fuzzy set. It is used to transfer fuzzy inference results into a crisp output. In other words, defuzzification is realized by a decision-making algorithm that selects the best crisp value based on a fuzzy set.

**Why is Fuzzification used?**

The process of fuzzification allows the system inputs and outputs to be expressed in linguistic terms to allow rules to be applied in a simple manner to express a complex system. Figure 7.18. A temperature scale defined by fuzzy set theory.

### What is Fuzzification and defuzzification in soft computing?

Definition. Fuzzification is the process of transforming a crisp set to a fuzzy set or a fuzzy set to fuzzier set. Defuzzification is the process of reducing a fuzzy set into a crisp set or converting a fuzzy member into a crisp member.

**What do you mean by defuzzification explain any two defuzzification techniques with suitable example?**

Defuzzification is the conversion of a fuzzy quantity to a precise quantity, just as fuzzification is the conversion of a precise quantity to a fuzzy quantity. ยต For example, Fig (a) shows the first part of the Fuzzy output and Fig (b) shows the second part of the Fuzzy output.

## Which method of Fuzzification is based on common intelligence understanding and the context?

Inductive Reasoning. Intuition method is based upon the common intelligence ofhuman.

**What is membership function and Defuzzification?**

Defuzzification. It may be defined as the process of reducing a fuzzy set into a crisp set or to convert a fuzzy member into a crisp member. We have already studied that the fuzzification process involves conversion from crisp quantities to fuzzy quantities.

### Which block controls the fuzzification and defuzzification?

The fuzzy logic controller consists of four blocks namely fuzzification, inference mechanism, knowledge base and defuzzification. Fuzzification: In this stage the crisp variables of inputs are converted in to fuzzy variables. The fuzzification maps the error and change in error linguistic labels of fuzzy sets.

**What is the difference between Mamdani and Sugeno in fuzzy logic?**

The most fundamental difference between Mamdani-type FIS and Sugeno-type FIS is the way the crisp output is generated from the fuzzy inputs. While Mamdani-type FIS uses the technique of defuzzification of a fuzzy output, Sugeno-type FIS uses weighted average to compute the crisp output.

## What is the purpose of membership grade in fuzzy set?

The fuzzy membership function generalizes this concept by allowing elements to be partial members of a set, reflecting degrees of uncertainty about the information.

**Why fuzzy logic is useful in different research areas of computer science?**

Fuzzy logic can be used for situations in which conventional logic technologies are not effective, such as systems and devices that cannot be precisely described by mathematical models, those that have significant uncertainties or contradictory conditions, and linguistically controlled devices or systems.

### Why fuzzy sets are needed in place of crisp sets?

Fuzzy set can have a progressive transition among many degrees of membership. They are generally used in fuzzy controllers. The elements have the ability to be partially included in the set. They are based on infinite-valued logic.

**What are the different methods of defuzzification process?**

There are many different methods of defuzzification available, including the following:

- AI (adaptive integration)
- BADD (basic defuzzification distributions)
- BOA (bisector of area)
- CDD (constraint decision defuzzification)
- COA (center of area)
- COG (center of gravity)
- ECOA (extended center of area)