Answered
struggling with plotting slope field of second-order ODE containing sign function
Hi @Kieth Duong, The slope field depends on how the mesh is generated. Denser mesh is more accurate but with quiver, it will pr...

3 years ago | 1

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Answered
How to plot the direction field of a system of first-order ODEs using MATLAB?
Hi @Kieth Duong, The basic code looks like the following: [X, Y] = meshgrid(-2:4/14:2, -2:4/14:2); U = 2*X + 9/5*Y; V = -5/...

3 years ago | 2

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Answered
Fuzzy Best-Worst Method
Hi @SOURAV MONDAL The Best Worst Method is relatively new, being conceived in 2015 for dealing with multi-criteria decision-mak...

3 years ago | 2

Answered
Getting error when building Fuzzy Logic on Simulink
Hi @Ajay My guts tell me that in one of the three fuzzy inputs {Temperature, Humidity, and Wind Speed}, the designed MFs did no...

3 years ago | 1

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Answered
Membership Trapezoid function Plot
Hi @Ameri The range for Last Hop is not given. So, you might try something like this: fis = mamfis; % Option #1: using rect...

3 years ago | 1

Answered
Why wont the state-space block accept a mux input?
Hi @ymps Your given state-space model is , and you will obviously see that it takes only a SINGLE input after doing the ma...

3 years ago | 1

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Answered
Adaptive step size solver for an ODE
Hi @Ali Kiral After fixing the code, you can compare your result with the result by ode45(). A little analysis shows that the ...

3 years ago | 2

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Answered
Adding surface to a beheaded Gaussian function
Hi @Bernd I'm not sure if this is what you want because your code doesn't reflect what you described. Anyhow, take a look at th...

3 years ago | 1

Answered
Error occurred while running the simulation
Hi Marco, In most cases, the problem is likely caused by the singularity event, something like approaching the division-by-ze...

3 years ago | 0

Answered
Is there a way to change the value of the transfer function through MATLAB & Simulink?
Hi @영탁 한 On top of the Paul's proposed solution in Simulink, here is one of few solutions in MATLAB. If you like this solution...

3 years ago | 2

Answered
Tuning a PID controller to desired Overshoot, settling time and rise time
Hi @Muhammad This is the Root Locus compensator design approach, first attempt. s = tf('s'); Gp = 20/(s^2 + 4.5*s + 64) c...

3 years ago | 1

Answered
Solving system of ODEs with ode45
Hi @shir levi Edit: Previously I've got the same results like you did. However, after thinking about it, those 2 sets of 3 valu...

3 years ago | 0

Answered
How quarter car modeling on MATLAB?
Hi @Mustafa Furkan, I prefer the simulation-based numerical solution over the formula-based analytical solution in the example ...

3 years ago | 0

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Answered
How to write the feedback command here.
Hi @Hardik These are the basic commands. You can find more examples in the documentations related to commands. Search MathWorks...

3 years ago | 2

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Answered
Algorithm for rlocus (internal code of rlocus)
Hi @Pushkar K You can browse through the folders, or you can type the following to view the code: edit rlocus

3 years ago | 1

Answered
How to solve nonlinear equation?
Hi @GUANGHE HUO The nonlinear matrix ODE with time-varying stiffness matrix K can be transformed into a nonlinear state-space m...

3 years ago | 1

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Answered
How can i calculate the PI controller gains from my plant transfer function
Hi @Mads Olesen It appears that your intuition is right. The P-only controller is sufficient because the steady-state error is ...

3 years ago | 1

Answered
I've tried to simulate a catalytic reactor by solving 5 second order differential non-linear equations. I've used 'odetovectorfield' which I'm not pretty sure about that
Hi @Mahdi The system can be run now. However, the simulation shows that the system blows up, which may indicate that the system...

3 years ago | 0

Answered
Gyroscope simulation using State space
Hi @Saleem Jallet, You didn't provide the transfer function of the gyroscope with sensor dynamics. In short, you need to prov...

3 years ago | 1

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Answered
pendulum with air resistance in simulink
Hi @Jordi van Selm Yes, your model is correct. In fact, the pendulum equation can be rewritten as a system of 1st-order ODEs: ...

3 years ago | 1

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Answered
Plot of three coupled oscillator.
Hi @Haya Ali I don't know what oscillators are since you didn't provide the math equations to compare with. However, on the pro...

3 years ago | 1

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Answered
Sinusodial Wave for PID controller
Hi @Juan Barragan After simplifying the expression, what does mean? If you want to simulate the system in transfer functions,...

3 years ago | 0

Answered
segway simulation on Inclined plane
Hi @Christopher You can probably find about the modeling knowledge in this article, "A Control Method of Inclined Inverted Pend...

3 years ago | 1

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Answered
calculate approximate derivative in matlab
Hi @Minh Not sure if you are looking for this syms x y = log(x) dydx = diff(y) However, please check the data in the Tab...

3 years ago | 1

Answered
Solving non linear ode using ode45
Hi @Shubham, I don't know how you derived this, but after rearranging the equation you can see the state variable is at ...

3 years ago | 0

Answered
Export transfer functions from Control System Design App
Hi @Gili Check if you can click <Export> and able to select the desired model LoopTransfer_C from list in the Export Model dial...

3 years ago | 0

Answered
Runge-kutta 4
Hi @Stanley Umeh I requested you to show the mathematics of RK4 so that you can learn about how the algorithm works as well as ...

3 years ago | 0

Answered
How to find the x, y range of values for a multivariable function using optimization?
Hi @Haider, It is probably best to show your professor these plots and asks for guidance. A picture is worth a thousand words; ...

3 years ago | 0

Answered
Adaptive Control Law Design, s-function not working, please help
Hi @Farhan Manzoor Let us know if the following suggestions works. Step 1: In all S-function Blocks, leave the field of the S-...

3 years ago | 1

Answered
For this question, my graph didn't appear anything... Can anyone help me to solve this problem??
Hi @Muhammad Huzayl Rais If you want to plot the function over a region , then you can try something like this. x = linspace(...

3 years ago | 1

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