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...

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...

3 years ago | 0

| accepted

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...

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...

3 years ago | 0

| accepted

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...

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...

3 years ago | 1

| accepted

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...

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...

3 years ago | 0

Answered

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...

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...

3 years ago | 1

Answered

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); %...

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); %...

3 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...

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...

3 years ago | 2

| accepted

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...

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...

3 years ago | 0

Answered

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...

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...

3 years ago | 2

| accepted

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); %...

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); %...

3 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 ...

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 ...

3 years ago | 0

Answered

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...

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...

3 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...

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...

3 years ago | 0

| accepted

Answered

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...

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...

3 years ago | 0

| accepted

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...

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...

3 years ago | 3

Answered

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...

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...

3 years ago | 0

| accepted

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...

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...

3 years ago | 0

Answered

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*...

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*...

3 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) ...

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) ...

3 years ago | 1

Answered

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 ...

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 ...

3 years ago | 0

Answered

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...

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...

3 years ago | 0

Answered

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,:); ...

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,:); ...

3 years ago | 0

Answered

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...

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...

3 years ago | 1

Answered

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...

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...

3 years ago | 0

Answered

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)...

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)...

3 years ago | 0

| accepted

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...

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...

3 years ago | 1

| accepted

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.

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.

3 years ago | 0

Answered

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...

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...

3 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 ...

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 ...

3 years ago | 1

| accepted

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...

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...

3 years ago | 1