Answered

Frequency based weighting in Simulink

One approach can be to fit a model to that table. For example; f = [0.1 0.125 0.16 0.2 0.25 0.315 0.4 0.5]; m = [62.4 97.2 1...

Frequency based weighting in Simulink

One approach can be to fit a model to that table. For example; f = [0.1 0.125 0.16 0.2 0.25 0.315 0.4 0.5]; m = [62.4 97.2 1...

11 days ago | 0

| accepted

Answered

how to calculate the value of theta_k in terms of theta_i and theta_j

If you have symbolic toolbox, you can use something like this; syms a b c real % define a b c as real symbolic variables eq = ...

how to calculate the value of theta_k in terms of theta_i and theta_j

If you have symbolic toolbox, you can use something like this; syms a b c real % define a b c as real symbolic variables eq = ...

14 days ago | 0

Answered

Open Loop Time Response ?

Define your transfer function first. Then define your time vector. I have no idea what you want for input but I will use a nice ...

Open Loop Time Response ?

Define your transfer function first. Then define your time vector. I have no idea what you want for input but I will use a nice ...

1 month ago | 0

Answered

How can I put a display that shows changing variables in a plot?

Assuming you plot in a for loop and the changing variable is x, below code will update the title of the plot to be equal to x f...

How can I put a display that shows changing variables in a plot?

Assuming you plot in a for loop and the changing variable is x, below code will update the title of the plot to be equal to x f...

2 months ago | 0

Answered

How can i verify time step of excel files?

After you load the file in to matlab workspace, name the variable for time. Then you can use diff() function to find the differe...

How can i verify time step of excel files?

After you load the file in to matlab workspace, name the variable for time. Then you can use diff() function to find the differe...

2 months ago | 0

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Answered

Plot a discrete signal

Here is one way; n = -5:0.1:5; index = [find(n==-3) find(n==-1) find(n==1) find(n==3)]; x = zeros(length(n),1); x(index) = 1...

Plot a discrete signal

Here is one way; n = -5:0.1:5; index = [find(n==-3) find(n==-1) find(n==1) find(n==3)]; x = zeros(length(n),1); x(index) = 1...

4 months ago | 0

Answered

How to set different intervals using linspace()?

If you want to remove a certain element; x = linspace(1,100,1e3); % 1000 elements i = 100; % index to be remov...

How to set different intervals using linspace()?

If you want to remove a certain element; x = linspace(1,100,1e3); % 1000 elements i = 100; % index to be remov...

7 months ago | 0

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Answered

error in subcript must real integers or logicals

If you run this portion ((idemod-1)*length(tmod)+1:idemod*length(tmod)).*cos(2*pi*fc*tmod) which you use as index, you will se...

error in subcript must real integers or logicals

If you run this portion ((idemod-1)*length(tmod)+1:idemod*length(tmod)).*cos(2*pi*fc*tmod) which you use as index, you will se...

7 months ago | 0

| accepted

Answered

How to exchange between X and Y axes in a 3D graph?

You can use a code like; h = findobj(gca,'Type','line') x=get(h,'Xdata') y=get(h,'Ydata') z=get(h,'Zdata') This will extrac...

How to exchange between X and Y axes in a 3D graph?

You can use a code like; h = findobj(gca,'Type','line') x=get(h,'Xdata') y=get(h,'Ydata') z=get(h,'Zdata') This will extrac...

7 months ago | 0

Answered

How to Design a Full Order Observer in MATLAB?

place() function is for controller design not related to observers. The function finds a state feedback control law, u = Kx, suc...

How to Design a Full Order Observer in MATLAB?

place() function is for controller design not related to observers. The function finds a state feedback control law, u = Kx, suc...

10 months ago | 0

Answered

any input function to transfer functionm

I think the function you are looking for is lsim(). The usage is pretty simple. t = 0:1e-3:10; % time vector u = rand...

any input function to transfer functionm

I think the function you are looking for is lsim(). The usage is pretty simple. t = 0:1e-3:10; % time vector u = rand...

11 months ago | 0

Answered

State Space block state vector value

To do that you need to specify your states as outputs by modifying your C matrix. C = [1 2 3 4]; % original C matrix that giv...

State Space block state vector value

To do that you need to specify your states as outputs by modifying your C matrix. C = [1 2 3 4]; % original C matrix that giv...

11 months ago | 0

Answered

how to design a notch filter in matlab

Here is one way; alpha= 2000; % determines the depth f = 650*2*pi;% notch filter frequecy (rad/s) x = 0.1; % no...

how to design a notch filter in matlab

Here is one way; alpha= 2000; % determines the depth f = 650*2*pi;% notch filter frequecy (rad/s) x = 0.1; % no...

12 months ago | 0

Answered

modify axis in time series

You are not clear on what you want to do but from what I understand, you want to change the x labels from 0-2-4-6.. to something...

modify axis in time series

You are not clear on what you want to do but from what I understand, you want to change the x labels from 0-2-4-6.. to something...

12 months ago | 0

Answered

FOR loop calculating next values using the previous values

Your for loop cannot go upto size(Xin,1). Imagine Xin has 10 elements. For calculation of M10, you would need to access Xin(11),...

FOR loop calculating next values using the previous values

Your for loop cannot go upto size(Xin,1). Imagine Xin has 10 elements. For calculation of M10, you would need to access Xin(11),...

1 year ago | 0

| accepted

Answered

Plotting contours of Z on an x-y axis where Z is not a function of x or y

You do not have a lot of data so the countour map will not look great. However what you need to do is; % create data x = [0.2 ...

Plotting contours of Z on an x-y axis where Z is not a function of x or y

You do not have a lot of data so the countour map will not look great. However what you need to do is; % create data x = [0.2 ...

1 year ago | 0

| accepted

Answered

How can i get fourier transform of this function

Here is a one way of doing it; clear;clc A = 2; f = @(t,t1,t2) A.*((t1<t) & (t<t2)); Fs = 1000; t = 0:(1/Fs):...

How can i get fourier transform of this function

Here is a one way of doing it; clear;clc A = 2; f = @(t,t1,t2) A.*((t1<t) & (t<t2)); Fs = 1000; t = 0:(1/Fs):...

1 year ago | 0

Answered

about why in pole placement gives me error?

It is just the error says. Place command cannot place poles with multiplicity greater than rank(B). In your case, rank(B) is 1. ...

about why in pole placement gives me error?

It is just the error says. Place command cannot place poles with multiplicity greater than rank(B). In your case, rank(B) is 1. ...

1 year ago | 0

| accepted

Answered

tfestimate gives different results for different Fs

It is because when you change the sampling time, you are basically playing with the fft of the signal. You should use Ts value o...

tfestimate gives different results for different Fs

It is because when you change the sampling time, you are basically playing with the fft of the signal. You should use Ts value o...

1 year ago | 0

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...

1 year 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...

1 year 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...

1 year 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...

1 year 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...

1 year 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); %...

1 year 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...

1 year ago | 0

| 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...

1 year 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...

1 year ago | 1

| 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); %...

1 year ago | 0