Mamdani and Sugeno Fuzzy Inference Systems
Fuzzy Logic Toolbox™ software supports two types of fuzzy inference systems:
Mamdani systems
Sugeno systems
Fuzzy Inference System  Advantages 

Mamdani 

Sugeno 

Mamdani Fuzzy Inference Systems
Mamdani fuzzy inference was first introduced as a method to create a control system by synthesizing a set of linguistic control rules obtained from experienced human operators [1]. In a Mamdani system, the output of each rule is a fuzzy set.
Since Mamdani systems have more intuitive and easier to understand rule bases, they are wellsuited to expert system applications where the rules are created from human expert knowledge, such as medical diagnostics.
The inference process of a Mamdani system is described in Fuzzy Inference Process and summarized in the following figure.
The output of each rule is a fuzzy set derived from the output membership function and the implication method of the FIS. These output fuzzy sets are combined into a single fuzzy set using the aggregation method of the FIS. Then, to compute a final crisp output value, the combined output fuzzy set is defuzzified using one of the methods described in Defuzzification Methods.
Sugeno Fuzzy Inference Systems
Sugeno fuzzy inference, also referred to as TakagiSugenoKang fuzzy inference, uses singleton output membership functions that are either constant or a linear function of the input values. The defuzzification process for a Sugeno system is more computationally efficient compared to that of a Mamdani system, since it uses a weighted average or weighted sum of a few data points rather than compute a centroid of a twodimensional area. [2]
You can convert a Mamdani system into a Sugeno system using the convertToSugeno
function. The resulting Sugeno system has constant output membership functions that
correspond to the centroids of the Mamdani output membership functions.
Each rule in a Sugeno system operates as shown in the following diagram, which shows a twoinput system with input values x and y.
Each rule generates two values:
z_{i} — Rule output level, which is either a constant value or a linear function of the input values:
$${z}_{i}={a}_{i}x+{b}_{i}y+{c}_{i}$$
Here, x and y are the values of input 1 and input 2, respectively, and a_{i}, b_{i}, and c_{i} are constant coefficients. For a zeroorder Sugeno system, z_{i} is a constant (a = b = 0).
w_{i} — Rule firing strength derived from the rule antecedent
$${w}_{i}=AndMethod({F}_{1}(x),{F}_{2}(y))$$
Here, F_{1}(...) and F_{2}(...) are the membership functions for inputs 1 and 2, respectively.
The output of each rule is the weighted output level, which is the product of w_{i} and z_{i}.
The easiest way to visualize firstorder Sugeno systems (a and b are nonzero) is to think of each rule as defining the location of a moving singleton. That is, the singleton output spikes can move around in a linear fashion within the output space, depending on the input values. The rule firing strength then defines the size of the singleton spike.
The final output of the system is the weighted average over all rule outputs:
$$\text{FinalOutput=}\frac{{\displaystyle \sum _{i\text{=}1}^{N}{w}_{i}{z}_{i}}}{{\displaystyle \sum _{i=1}^{N}{w}_{i}}}$$
where N is the number of rules.
The following figure shows the fuzzy inference process for a Sugeno system.
Note
Sugeno systems always use product implication and sum aggregation.
Because of the linear dependence of each rule on the input variables, the Sugeno method is ideal for acting as an interpolating supervisor of multiple linear controllers that are to be applied, respectively, to different operating conditions of a dynamic nonlinear system. For example, the performance of an aircraft may change dramatically with altitude and Mach number. Linear controllers, though easy to compute and suited to any given flight condition, must be updated regularly and smoothly to keep up with the changing state of the flight vehicle. A Sugeno fuzzy inference system is suited to the task of smoothly interpolating the linear gains that would be applied across the input space; it is a natural and efficient gain scheduler. Similarly, a Sugeno system is suited for modeling nonlinear systems by interpolating between multiple linear models.
References
[1] Mamdani, E.H., and S. Assilian. ‘An Experiment in Linguistic Synthesis with a Fuzzy Logic Controller’. International Journal of ManMachine Studies 7, no. 1 (January 1975): 1–13. https://doi.org/10.1016/S00207373(75)800022.
[2] Sugeno, Michio, ed. Industrial Applications of Fuzzy Control. Amsterdam ; New York : New York, N.Y., U.S.A: NorthHolland ; Sole distributors for the U.S.A. and Canada, Elsevier Science Pub. Co, 1985.