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problem with matlab function in simulink (inpunt problem)
Hi @Alya Bostani Is this the expected result for ? Try fixing the code in the matlabFunction block. t = 0:0.01:10; P = as...

2 years ago | 0

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a nonlinear system and its control input in simulink
Hi @controlEE Great job on your progress shown in the comment. Now, I'd like to share my piecewise function formula with you: ...

2 years ago | 1

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How to get graph properties on Live script? e.g. Rise time, setting time etc.
Can use the stepinfo() command. G = tf(1, [1, 10, 20]) % the transfer function stepinfo(G) step(G), grid on

2 years ago | 2

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Answered
Hello all, I have a little problem with my simulink model. So, I can't connect this block each other like I had in past model from old version Matlab. Do u mind, how solve ?
Hi @Bogdan The blocks you're looking for are likely still present in the MATLAB directory, although they may be hidden within s...

2 years ago | 0

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I can't see the cosine graph. How do I generate the cosine graph using 2^10 samples?
deltat = 0.001; nsamples = 2000; time =[0 : deltat : deltat*(nsamples-1)]; size(time) % for i = 1:nsamples ...

2 years ago | 0

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Solving a system of Non Linear Differential Equations
Hi @kdv0 Apart from the incorrect initial value for , which should be , the rest of the information in the code is correct. The...

2 years ago | 0

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Plotting an Inverse Laplace Function
Not exactly an answer, but rather an attempt to recreate the 'answer' that was displayed in your Command Window. It appears th...

2 years ago | 0

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How to fix my linear fit model?
Hi @Jenni Upon initial inspection, it appears that the data follows the trend of the ReLU function, which is a piecewise linear...

2 years ago | 1

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Simulation for a standalone wind turbine with a DFIG
There is an example for a wind turbine with a Doubly Fed Induction Generator (DFIG). Type "DFIG" at the Help Center to search ...

2 years ago | 0

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Answered
Couple ODE System not enough Input arguments, Why?
Hi @Thanh Hoang I have added these four lines to your original code. The modifications made are minimal. %% ----- added these ...

2 years ago | 0

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pole zero plot of simulink
Hi @Gowtham Use this block.

2 years ago | 0

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I want to find two missing parameters in an ODE system of equations using regression/optimization in MATLAB
Hi @naiva saeedia The system identification task at hand seems to be quite challenging, as you only have two parameters to mani...

2 years ago | 0

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How do I optimize solutions of ODE?
Hi @Amito Usami-san Considering your objective of varying the force input 'Fc', it becomes necessary to create a Gain Schedule ...

2 years ago | 1

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Answered
solve differential equations use bvp4c
Hi @lvlv sun Add these two lines to code as shown below to get the desired number of points for the solution. numpts = 5; ...

2 years ago | 0

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hi.I have problem in spacecraft dynamic control simulation.
Hi @ali.heydari I renamed the ODE function to 'odefcn()' because 'ode' is a built-in function introduced in the R2023b release....

2 years ago | 0

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Answered
How can i pass S-curve through the center of a circle ??
Hi @Dr Sohaib Khan Check if the following is the desired 3D line plot? t1 = (0:pi/100:pi); % Top curve 0 to 180 deg t2 = (-p...

2 years ago | 0

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Answered
a nonlinear system and its control input in simulink
Hi @controlEE, If you define solely as a continuous-time function, it would appear as displayed in Figures 1 and 2. h = 2; ...

2 years ago | 1

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Minimize the sum of squared errors between the experimental and predicted data in order to estimate two optimum parameters
Hi @Vikas Meena Taking into account the information provided, this solution is likely the most suitable option I can propose. ...

2 years ago | 0

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Need Help with Position, Velocity, Acceleration model
Hi @Sinan When modeling a differential equation in Simulink, it is generally necessary to formulate the problem in integral for...

2 years ago | 0

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i want to get the overall transfer function of the parallel conncected transfer functions blocks
@deekshith, Oh I see. Because you left the spaces. Either you ensure no spaces, or place commas (,) between the elements.

2 years ago | 0

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i want to get the overall transfer function of the parallel conncected transfer functions blocks
Hi @deekshith, Check if this works for you. %% Transfer function 1 num1=[576 288]; den1=[4.8 34.992 73.392 1504.8]; G1 = tf...

2 years ago | 1

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Answered
Matlab is giving different answers for the same calculation
Hi @Stephen The discrepancy observed can be attributed to numerical precision errors introduced by humans. The scripted answer ...

2 years ago | 0

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Answered
ODE45 and dsolve result difference
The order of the state variables between and is swapped in the symbolic approach. syms v(t) y(t) w(t) z(t) % Parameter k1...

2 years ago | 1

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Answered
error bar in curve fitted graph
Use errorbar(). x = (-1:0.1:1)'; y = asinh(x/0.5); f = fit(x, y, 'poly1') err = y - f(x); errorbar(x, y, err), hold ...

2 years ago | 0

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Unable to perform 'TF2SS" operation
Rename the script file with a different name, for eample, 'convertTF2SS.mlx'. which tf2ss -all

2 years ago | 0

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Optimization Problem for 3-Element Windkessel Model. Need help with improving my optimization and looking for better optimization alogrithims.
Hi @Hussam In my solution, I suggested utilizing the dI/dt-free model: This approach enables me to directly utilize the ra...

2 years ago | 0

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Answered
icare function doesn't return the value for X_lqr, K_lqr.
OP: I don't know why, but L_lqr(9x1) matrix's components are all complex number. The description in icare() documentation says ...

2 years ago | 0

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Answered
Plug Flow Reactor with axial dispersion ODE (error)
Hi @Cai Li Song There doesn't seem to be any coding issue with the 2nd-order ODE 'dX_CH4dz' when I substituted all parameters w...

2 years ago | 2

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Answered
how to transfer a simulink model from the old version to the new version
If you're already using MATLAB/Simulink R2024a, you should be able to open the previously saved slx or mdl file from the R2014a ...

2 years ago | 0

Answered
DIfferences on Sloped field using 'dsolve' and 'ode45'
Hi @Athanasios Paraskevopoulos The reason for obtaining different results is due to the selection of an incorrect initial value...

2 years ago | 1