# Sam Chak

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**Content Feed**

can not use PID tuner in simulink

Hi @Cheng an Ku, @Foo Yun Hong, @Jhayo Since the Control System Toolbox is available, I think the workaround is to first work o...

2 days ago | 0

PI Controller Tuning for totem pole Pfc

Hi @Barath Narayanan I forgot to ask the PI values you obtained from sisotool. Please check if the performance requirements are...

3 days ago | 0

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Calculate the area of geometry

Hi @Minh If you know the point coordinates of the geometry, perhaps you can explore the area() function. x = [0 2 1.5]; y = [...

3 days ago | 0

Finding the function of the supremum

Hi @Aysel Alimirzayeva I'm not sure if the following is what you want. But this 1st-order transfer function (taking the Laplace...

3 days ago | 0

Simple PID Controller with Simulink

Hi @Jeff Dillon Not a VTOL person, but from the free-body diagram, Newton's 2nd Law can be applied with the basic assumptions o...

5 days ago | 0

| accepted

How to plot this function?

@Juan Vicente Probably the plot looks like this: syms x y fimplicit(log(abs(y/(y + 1))) == -1/x, [-5 5 -10 10])

6 days ago | 0

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Rounding towards zero or from zero

Hi @Nick Austinos Does this work for you? x = 3.6; y = floor(x)

7 days ago | 0

Throttle Command to Torque Command

Hi @Tamas Can you possibly find out the formula or relationship between the Throttle_position and the Torque_command? If you d...

7 days ago | 0

Matlab code for solving nonlinear equations

Since you generally asked for any three nonlinear equations, I guess you just need to constrain the solver/algorithm to take onl...

9 days ago | 0

Find the minimum of a function

Hi @Melika Eft The constrained optimization problem probably can be formulated like this: fun = @(x) x(1)^2 + x(2)^2; x0 = [...

9 days ago | 1

| accepted

How can I compute envelope for three phase current?

You can try if the envelope function works for you. https://www.mathworks.com/help/signal/ref/envelope.html

9 days ago | 0

Plot of magnetic field

@Prem, Not exactly sure what you asked. If you are asking about plotting in MATLAB, then use this function: help plot If you ...

10 days ago | 0

Vehicle speed calculation script

Hi @Prabaharan A Here is a basic script to calculate the average vehicle speed: Distance = 200; % km Duration...

10 days ago | 0

Add 2 trigonometric functions, with conditions

Are you trying to plot the addition of two sinusoidal functions, even when there are discontinuities? x = linspace(-1, 1, 200...

10 days ago | 0

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hi every one i need series for erfc(x) match with it in plot

Hi @sura Are you looking for something like this? syms x sympref('PolynomialDisplayStyle', 'ascend'); f = erfc(x); ...

11 days ago | 0

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how to change the fall time of step input in simulink

Hi @Swasthik Baje Shankarakrishna Bhat, You reuse the same syntax. I created a general one so that you can enter the desired pa...

11 days ago | 0

Finding peak in the Gaussian like function which Value is unknown.

Hi @Jae-Hee Park Can you try if the findpeaks function works for your application? You can also find some examples here: http...

11 days ago | 0

Fuzzy Logic display results

Hi @strat For this requirement, we can try the dictionary Object (newly introduced in R2022b) to map the FIS output (Fan Speed ...

12 days ago | 0

how to change the rise time of step input in simulink

Hi @Swasthik Baje Shankarakrishna Bhat Edit: I created a general one so that you can enter the desired ramp up parameters: % u...

12 days ago | 0

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How to use output of one fuzzy logic system as input for another?

Here is a simple example, where the output from the first FIS is fed into the second FIS. If the dual system is designed correc...

13 days ago | 0

find the value/s of the membership function when a crisp value is given???

Hi @Gadelhag M Omar Mohmed, It might be a little late answering this. But a data-driven Mamdani Fuzzy System can be generated ...

13 days ago | 0

Finding the relative orientation to a robot

Hi @Pawel Grum Generally, you can the transformation matrix to obtain the relative orientation. For simplicity, you can try stu...

13 days ago | 1

| accepted

how to reduce fuzzy rules generated by mamdani fis

With almost a thousand rules for 8 inputs, I guess there are 6 inputs with 2 fuzzy sets, 1 input with 3 fuzzy sets, and another ...

14 days ago | 0

how to code transfer function

@Cesar Cardenas, Try something like this: tau0 = 2; tau1 = 3; Gp = tf(1, [tau1 1],'InputDelay', tau0) For more info, plea...

14 days ago | 0

help with smooth curve

@Felix Obite, Have you looked into interp1() function? Check out the first example: https://www.mathworks.com/help/matlab/ref/...

14 days ago | 0

Velocity vs Time graph in matlab

Hi @Sandun, I'm also new as to this kind of problem, with , strictly from the mathematical notation perspective. I think item ...

14 days ago | 0

I am looking to plot the following set of equations. Can someone please help me out with this

Let me try helping. I don't know about your functions and their parameters. But here is a basic example: Say we want to plot ...

14 days ago | 1

How to get the fuzzy value of an input when the crisp value is given

The evalmf() function can used in this situation. help evalmf x = -10:0.1:10; mf = fismf("pimf", [-9 -7 2 7]); y = evalmf(...

15 days ago | 0

How do I solve this simultaneous equation below

Hi @Adam Verify with MATLAB: x = roots([1 1 -6]) Can I leave you to find as a simple exercise?

16 days ago | 0

Fuzzy controller giving constant output of z = 0.5 (z range [0,1])

There is nothing wrong. The reason the Crisp Output starts from is because the linear MF is chosen and the range of the Output ...

16 days ago | 0