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**Feeds**

Is there a way to determine an equivalent circuit for Nyquist diagrams (I have the data set) using Matlab (or Simulink)?

Hi @Arthur FdA I'm unfamiliar with your circuit system. However, if you have the data in the form of frequency-response, then y...

1 day ago | 1

for the parameter space in fuzzy logic , how can i choose the value of the numbers ?

Each selected membership function type requires the parameters to be specified as a vector. The length of the parameter vector d...

3 days ago | 0

Asking about fuzzy mamdani rule

Please refer to the example in the link for constructing a fuzzy inference system at the MATLAB command line. https://www.mathw...

3 days ago | 0

No rules fired for Output 1. Defuzzified output value set to its mean range value 2.3873.

Hi @Eliane Fernández I replicated the Warning message in the example below. It is easier to understand why the warning occurs b...

3 days ago | 0

Error in Simulink - Derivative of state '1' in block at time 301.02267725 is not finite. The simulation will be stopped. There may be a singularity in the solution.

Hi @federica terlizzi % Derivative of state '1' in block 'gam_control1/PID Controller2/Integrator/Continuous/Integrator' % at...

3 days ago | 0

changes the parameters of a fuzzy Inference system in run time

Hi @gaurav kumawat If you enter fixed numeric values in the block parameters of the membership function blocks or in the fuzzy ...

4 days ago | 0

why is the Transfer fcn like this instead of showing in variable s?

Hi @Saeid It's because the block is not big enough to display . Click at the corner of the block and drag it horizontally unti...

5 days ago | 0

fuzzy logic controller failed design problem

Hi @KAO CHUN YU The singleton (constant) output membership functions in Fig. 5 indicate that this is a Sugeno fuzzy system; how...

6 days ago | 0

Possibility of Custom Denominator of Transfer Function within Simulink

Hi @Alexander Gaudreau For a variable gain in a dynamic model, you can try describing the system using MATLAB Function block. ...

6 days ago | 0

| accepted

How to change the Type of MF from trimf to constant in the Fuzzy Logic Designer app?

Hi @m gh You can convert the Triangular MFs to Singletons (constant MFs) using this workaround, by specifying all three triMF p...

6 days ago | 0

Custom Sugeno Fuzzy Model

Hi @Mojtaba Hasanzadeh As of the R2024b release, custom output membership functions are still not supported for Sugeno systems ...

7 days ago | 0

Too Much Variables in Fuzzy Logic and ANFIS

Hi @YTU With 13 inputs and 5 membership functions each, the total number of rules exceeds more than billion rules when using t...

7 days ago | 0

the neuro fuzzy sistem modify the membership function in input or in output?

Hi @astrubale ponzio In the following simple example, the ANFIS is trained to fit a trapezoidal set-based fuzzy system to the i...

8 days ago | 0

How to fit this model with a Weibull distribution?

Hi @Michele Turchiarelli I normalized the x-axis data to facilitate the fitting algorithm's search process. Is this solution ac...

8 days ago | 1

| accepted

How to design constant membership functions (singletons) for the output of a Mamdani fuzzy system?

Hi @Peddireddy This is a decade-old question, but it is indeed possible to implement a Mamdani fuzzy system (MamFIS) for the ou...

9 days ago | 0

Expert System using Fuzzy Logic

Hi @Arief The Fuzzy Tipper example is considered an Expert System for describing the tipping behavior that is typically practic...

9 days ago | 0

What are the meanings of fuzzy rules expressed in indices format?

Hi @Yadollah Sabri 1 1, 1 (1) : 2 2 0, 2 (1) : 1 This approach is one of several ways to specify the rules using membership f...

9 days ago | 0

How to implement the linear output function in Takagi–Sugeno Fuzzy System?

Hi @m To describe the equation (a flat plane surface), use the syntax 'linear', [1 1 2] in the addMF() command for the output ...

9 days ago | 0

Curve fitter limitation for equations in the form f(x,y)=a*x^n/(y+b)^m

Hi @Boyan Given that there are only data points, employing a bivariate polynomial of degree two in and degree four in will e...

10 days ago | 1

| accepted

My roots don't match example roots when solving routh criterion

Hi @Jhryssa From Part (a), you should have obtained the stable range of : . Part (b) instructs you to verify the stability resu...

11 days ago | 0

I have a problem in which I have to define a fuzzy membership function with variable x(1) x(2) like below. For these variables I have to generate random number between 1 and 5. x(1)<x(2). What will be code for that?

Set a constraint on so that . fis = sugfis; %% Random integer generator n1 = 3; n2 = 5 - n1; x1 = randi(n1, 1); x2 ...

13 days ago | 0

How to get inputs from outputs in fuzzy interface system?

Hi @amir There is no built-in function in the Fuzzy Logic Toolbox to accomplish this. Moreover, if the fuzzy inference system (...

15 days ago | 0

Which "AND" operator is used for the fuzzy rules created by ANFIS?

Hi @Gary By default, ANFIS generates a single-output Sugeno fuzzy inference system. The 'AND' operator is specified in one of t...

15 days ago | 0

How to see the firing strength using command line of a fuzzy System?

Hi @Luis M The firing strengths can be obtained from the 5th output argument of the 'evalfis' command. Howevern note that this ...

15 days ago | 0

Membership function not plotting right

Hi @Juan Lopez Specifying the number of data points (numPoints) in the 'plofmf' command to plot for each MF will solve the prob...

15 days ago | 0

Problem in curve fitting using curvefitter app

Hi @Farkhanda Azmi I fitted the data using a logarithm function: %% Data load('yvalues_curvefit_case.mat'); y = y3a_DOD_...

16 days ago | 0

My Numerical Solution doesn't align with the exact solution

Hi @Prince Nino Perhaps you should verify the results with your Professor. You can also change the initial condition. %% Numer...

16 days ago | 1

What system of ODE's does Simscape Electrical's DC Motor Block use?

Because and , therefore . Note that you already have the term in your differential equation .

21 days ago | 0

Matlab ODE 4.5 Runge Kutta problem solver. Can't get it to work for one problem set.

Hi @DJ V You forgot to supply the values for l and n. theta = 0; phi = 0; psi = 0; Ctheta=cos(theta); Cphi = cos(phi); Cp...

23 days ago | 0

Very large output numbers

Hi @Marcos Proper transfer function should have the degree of the numerator less than or equals to the degree of the denominato...

23 days ago | 0