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Simulating a plant in Simulink
The Zero-Order Hold block with Sample Time parameter set to an expression that evaluates to the sampling period T does the sampl...

mehr als 2 Jahre vor | 0

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Lookup Table in Simulink
Hi wafaa, If the area and volume are both represented by by 2D arrays of the same size, and if the length and width input break...

mehr als 2 Jahre vor | 1

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How to convert time varying state matrix to ss ?
ss and other dynamic system models in the Control System Toolbox only support linear, time-invariant, systems, so the A-matrix i...

mehr als 2 Jahre vor | 0

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Does the 'sigmaplot' function plot the minimum or the maximum singular values of a MIMO transfer function?
I think it plots all of the singular values that are not identically zero, unless the MagUnits property is set to 'abs', in whic...

mehr als 2 Jahre vor | 0

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how to zero pad a vector to have the same amount of data as a vector with more data?
As of R2023b: paddata in_padded = paddata(in,numel(verb));

mehr als 2 Jahre vor | 2

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Why does C{1}(1) work but C(1){1} results in an invalid array index error in MATLAB?
C is 1x2 cell array C = {[1,2],'abc'} Curly brace indexing here "pops-out" the first element of C as an ordinary 1x2 vector C...

fast 3 Jahre vor | 0

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How to interpret the frequencies on a symmteric FFT plot.
Hi John, The very short, and loose, answer to your question is as follows. Suppose we have a signal, like x[n] = cos(2*pi/N*k*n...

fast 3 Jahre vor | 0

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What New Functions or Features in R2023B are of Interest?
New function svdappend sounds interesting. I wonder what typical use-cases might be? @Christine Tobler

fast 3 Jahre vor | 0

Frage

What New Functions or Features in R2023B are of Interest?
I was reading this question where Steve Lord suggested using a function expmv that is new in R2023B. I went over to the Matlab R...

fast 3 Jahre vor | 2 Antworten | 0

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Antworten

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What do the states in a series connection of a plant with time delay (approximated by pade approximation) represent ?
Hi Janki, "What do the first 2 states here represent? " Each state is the state variable of the state space realization of the...

fast 3 Jahre vor | 0

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Best practice: should a function return a row vector or a column vector
I just ran into a case where I had to make sure the output vector from a function had to have the same dimensions as a vector in...

fast 3 Jahre vor | 2

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I want to perform inverse Laplace transform but my code does not seem to work
Hi Carlos, ilaplace assumes that all signals are causal, which wouldn't be true in this case if a < 0. Add the appropriate ass...

fast 3 Jahre vor | 1

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Bode plot of a 157 order transfer function
Hi Dongxu Guo, That's quite a filter! Using a tf for a for such a high order filter is not likely to work due to large roundin...

fast 3 Jahre vor | 0

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The normal "state space" and "discrete state-space" block in Simulink have different results
Hi Christian, If the simulation step size is fixed at 1e-6, then the inherited Sample Time of the Discrete State Space block is...

fast 3 Jahre vor | 0

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Proper way to call designfilt for filtfilt
The example above is a low pass, linear phase FIR filter. Maybe a simple delay as is implemented in lowpass is acceptable? Cuto...

fast 3 Jahre vor | 1

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MATLAB telling me there are no real values to my step response when there are
Hi Sophie, It looks like that message will come up when calling step with a tf input with complex coefficients h = tf(1,[1+1i,...

fast 3 Jahre vor | 0

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How to Obtain State Space Model from Bode Plot Data
Hi Muhammad, Here is the first part of the code: T2 = readtable('E7i_CSV.csv'); ...

fast 3 Jahre vor | 1

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Getting an equation from a signal transfer function
Hi Sifiso, Here is an example that might be helpful. Generate an input signal inputAudio = sweeptone(6,0.1); Fs = 44.1e3; N...

fast 3 Jahre vor | 0

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How to avoid defining variable value with simulink.
No, this can't be done in Simulink, nor in the Control System Toolbox. With G1(s), G2(s), and H(s) define as symfun objects, you...

fast 3 Jahre vor | 0

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Why I am not getting sample time in the discrete transfer function block.
Hi Gokula, The Discrete Transfer Fcn block is one of the Blocks for Which [Setting] Sample Time Is Not Recommended. Instead, Si...

fast 3 Jahre vor | 0

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The problem is to obtain the eigen einergies of the Schrodinger equation for an array of l = 0:1: 5 and del = linspace(0,1,N)
hbar = 1; mu = 1;e = 1;De = 1;re = 1;alp = 0.01;N = 100; l = 0; del = 0; L = l.*(l+1); r = linspace(1,1.2,N);dr = r(2)-r(1); ...

fast 3 Jahre vor | 0

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How do we choose matrices in state feedback control?
Hi Luc, For lqr, the B matrix multiplies the control input. As I don't know what the variables mean in your problem, I can only...

fast 3 Jahre vor | 1

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Why am I getting this error "Conversion to logical from sym is not possible." in line 18?
syms x syms y %f(x,y) = input("Enter the function of f(x,y): "); f(x,y) = x^4 + y^4 -2*x^2 + 4*x*y - 2*y^2; df_dx = diff(f(x...

fast 3 Jahre vor | 0

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Reducing symbolic expressions with assumptions, but NOT simplify?
Hi Aroni, Consider the simple expression syms x f(x) = sin(x)/sqrt(1-cos(x)^2) Simplify simplify(f) If we assume that x is...

fast 3 Jahre vor | 0

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I got error with "error using plot, vectors must be the same length"
Hi Tran, Next time, please copy/paste your code into the Question, which makes it much easier for people to help. Original cod...

fast 3 Jahre vor | 0

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Jumps in signal connections - simulink
Hi Tobias, From the Matlab window: Click Preferences in the Environment ribbon. Select Simulink in the preferences window. C...

fast 3 Jahre vor | 0

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I need to put this block diagram in MATLAB (not in Simulink) and I do not know how to do it
Hi Carlos, Recheck the definiton of s2. Once you have that taken care of, I suggest you proceed with connect.

fast 3 Jahre vor | 0

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I don't know how to introduce the block (s+6) in simulink
Hi Carlos, One option would be to use block diagram manipulation. For example (there is at least one other approach): a) chang...

fast 3 Jahre vor | 0

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Valid Shape FFT Deconvolution
Hi Benjamin, Here's an approach for the 'valid' convolution. Problem parameters: x = 1:7; nx = numel(x); h = 1:3; nh = numel...

fast 3 Jahre vor | 0

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Simulink - Saving Base Workspace Variables
One option is to use the Model Workspace: "Each model is provided with its own workspace for storing variable values."

fast 3 Jahre vor | 1