Answered
My simulation is showing very small time not the total time period. Can anyone suggest the solution
In the setting of the scope (the gear symbol on the left top corner), there is a 'history' tab. In there remove the tick from 'L...

6 years ago | 0

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Answered
How to change load(resistance) while simulation is running
The easiest way is to use the switch block. You can either use simulation time to determine when to switch or define some condit...

6 years ago | 0

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Answered
bode plot from mass, stiffness and damping matrix
First of all, I think your M K and D matrices are not for a spring mass damper system. They do not have any negative elements in...

6 years ago | 2

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Answered
What is the purpose of Gmin and Gmax value in Hinfinty controller
From the function page you can find the information you need. I am pasting it here for convenience. --------------- Performanc...

6 years ago | 0

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how to simulate an impusles response of a transfer function?
An impulse signal is a signal that has a certain magnitude that is applied for a small time. So you can use transfer function bl...

6 years ago | 1

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How to realize a multiloop system in matlab?
Find below a simple example; A = rand(3); % random system A matrix B = rand(3,2); % random input B matrix C = eye(3); %...

6 years ago | 0

Answered
For loop for fibonacci series
In case of series, it is better to store each value. Please see below code that generatesa fibonacci sequence, and stores all th...

6 years ago | 4

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Answered
ODE function does not seem to work
First error is in sdof function. There should be a semicolon after c=1 and before m=3; k=3; c=1; m=3; Second error is in yo...

6 years ago | 0

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How can I design a PID Controller to stabllize the plant 1/(s^3+1) ? [beginner]
So you have a transfer function G(s) = 1/(s^3+1) and you want to find gains P,I,D for your controller K(s) = P+D*s+I/s. As commo...

6 years ago | 2

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Answered
MIMO ss2tf, how do I apply it to a 3x3 system?
You can try using just tf (if you are using one of the newer versions of Matlab) sys = ss(rand(6),rand(6,3),rand(3,6),0); %...

6 years ago | 0

Answered
Plotting circle using angle and radius
Next time, share your code so that we can debug your code. My guess is you angle are from +90 degrees to -90 degrees instead of ...

6 years ago | 0

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Forced step response of a signal
I recommend you look into <https://www.mathworks.com/help/control/ref/lsim.html lsim()> function, which is a lot more flexible t...

6 years ago | 0

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Answered
Index exceeds number of array elements (1)?
You only define V2(1) in your code and do not increase the size of the V2 variable. So I think you are missing a code in your fo...

6 years ago | 0

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How to subplot data in a given order?
Below modification will make the subplot in the order presented in the ch_order variable. ch_order = [6 4 2 1 3 5]; fo...

6 years ago | 0

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Answered
how can i find Open loop Transfer Function from Closed loop Transfer Function
From the basics of control theory you should know that for a given system G(s), the closed loop transfer function with unity fe...

6 years ago | 4

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Steady state doesn't appear in step response plot
The bad_sys works if you call the step function with; step(minreal(bad_sys/(1+bad_sys))) I am not sure about the exact r...

6 years ago | 0

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Answered
Saving output of for loop in array
There are some mistakes and unclear parts in your code. However, using your code, you can save it as; Pload = linspace (1,2...

6 years ago | 0

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Find the frequency at maximum value in pwelch function
You can obtain the frequency and power vectors from pwelch function. Example; fs = 1e3; t = 0:1/fs:1-1/fs; x = sin(2*...

6 years ago | 0

Answered
plot for x^2+y^2==3*x*y^2, x^3-x^2==y^2-y in matlab
syms x y real eq1 = x^2+y^2==3*x*y^2; eq2 = x^3-x^2==y^2-y; figure(1) ezplot(eq1) figure(2) ezplot(eq2) ...

6 years ago | 1

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Plotting FFT of several data sets (signals) of same length, in the same graph
y = [] just makes y an empty matrix. It is not a necessary code. I include it in the off chance that you had a variable named y ...

6 years ago | 0

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Listing possible combinations of integers, given constraints (Gear Ratio Related)
One possibility is using an optimization. Here is a simple code for it using OPTI toolbox; clear all,clc % round() is...

6 years ago | 0

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Count two columns with corresponding data
One thing you can do is (assuming you have newer versions of matlab); A = rand(10,2); % the data a1 = A(A(:,1)<0.3,:); ...

6 years ago | 0

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Damping Factor and natural frequency out of time response data
If this is impulse response, you can get the natural frequency by simply finding the time difference between each peak. Invertin...

6 years ago | 2

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Interpolate between two signals in Simulink
Here is how linear interpolation works; y1 = 10; % known flow rate for 47500 ft y0 = 2; % known flow rate for 23000 ft...

6 years ago | 0

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Plotting FFT of several data sets (signals) of same length, in the same graph
You put all of the signals you want in a matrix (each column is a different partition of the signal); data = rand(60000,1)...

6 years ago | 0

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Answered
ODE45 not updating a variable of nonlinear 2nd order diff.eq system
The reason is simple. Your dxdt(3) is always equal to 0. You do not have an equation for dxdt(3) in your function other than the...

6 years ago | 1

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Answered
How can i measure Angle in 3-D?
Check out this <http://portal.tpu.ru:7777/SHARED/k/KONVAL/Sites/English_sites/G/l_Angle_f.htm link> which has the answer.

6 years ago | 0

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Eulers Method Returning an Answer close but not exactly correct
The reason is simple. The time in your code start from 1 where as online calculators start from 0. If you adjusted your equat...

6 years ago | 0

Answered
How to conditionally solve two ODEs simultaneously using 'if-else' ?
ode45 does not check its values between start and end time. That is why you need to write your own solver or include the ifelse ...

6 years ago | 1

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Answered
How to solve the following System of first order differential equations using ode45?please help
First you create your function that outputs derivative of q when time and q are given to it. function qd = asd(t,q) k1...

6 years ago | 1