Answered
Getting trouble in EKF for pendulum (not tracking perfectly)
The state prediction equation needs to be modified, see below. I didn't verify the rest of the equations. g = 9.81; ...

2 years ago | 0

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string match and replace string with matching number from another matrix
From the desription, it sounds like the StimNo file contains a cell array (assuming all file names are unique) stimno = {'air.w...

2 years ago | 0

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Observer gain matrix calculations give warning when replicated with Matlab
Hi NGiannis, Here's the plant model and desired pole locations Gp=tf(1, [1 0 1 0]); s1=-1+i; %Desired closed loop poles s2=-...

2 years ago | 0

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Root Locus Plot Is Way Off
Hi Arpad, Let's take a look at that root locus for the uncompensated system. I asusme that the red x's indicate the desired clo...

2 years ago | 0

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lla2eci conversion for geo sat
Hi Derrick, I think the effect we're seeing here is a slight angular offset betweent the ECI z-axis and the Earth's axis of rot...

2 years ago | 0

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Answered
Unable to find transfer functon using model linearizer
Hi S L, Can you provide the parameters for your sinestream input signal? I couldn't get the Model Linearizer to run to complet...

2 years ago | 0

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stem a convolve signal
Because the first point in x corresponds to t = 0, so does the first point in y. t_conv has to have as many points as y. And the...

2 years ago | 0

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Answered
Error using .* Matrix dimensions must agree.
The anonymous function fun won't work unless the input arguments x and y are compatible for elementwise-multiplication with u an...

2 years ago | 0

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unexpected discontinuity in graphic
Hi Konstantinos, Your plot, the plot I got on my local machine, and the plot generated here aren't quite the same,presumbably d...

2 years ago | 0

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How to simply multiply a symbolic variable into a matrix?
I'm pretty sure that if u is to be symbolic then so must be A (unless you make A into a cell array, which is probably not the wa...

2 years ago | 0

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How to use multiple input-output datasets in ssest function (MIMO System Identification Toolbox).
The article also describes how to use the tt input to describe MIMO data sets (and for multiple experiments if that's needed): l...

2 years ago | 0

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Answered
Update M-script parameter value Continuously based on Workspace Data fed by a Simulink Model
The To Workspace block doesn't update the output in the workspace "continuously" while the simulation is running. Also, Simulink...

2 years ago | 0

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Answered
What approach can I take to design a filter that fits (approximately) the average power spectrum of multiple signals.
Hi G, Do you have the amplitude and phase spectra for the red curve? If so, you can try using tfest, though that spike at arou...

2 years ago | 0

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How to save the result of each loop separately
One option is to use a cell array to store dissimilar objects y = [3 4]; for i=1:length(y) x{i}=zeros(y(i),2) end Thoug...

2 years ago | 0

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Answered
How to enter vector coefficients to z-transform
g = [2,2.2,2.3]; a1 = [2, 5,8]; a2 =[ 1,0.3,0.4]; HZ = tf(zeros(3),'Ts',-1); for ii = 1:3 HZ(ii,ii) = tf(g(ii)*[1 2 1],...

2 years ago | 1

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Numerical error in simulink
Hi Junghyo Kim, Your question references "division by 0" but the error message has nothing to do with division by zero. The er...

2 years ago | 0

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Answered
Different integration results from int method in symbolic math toolbox
Looks like a bug in the computation of F2? syms x w; assume(x,"real"); assumeAlso(w,"real"); % integration y1=exp(-1i*w*x-x...

2 years ago | 1

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Magnitude response of allpass filter - group-delay equalization of an IIR filter
Hi Jay, Here is the filter [be,ae] = ellip(4,1,40,0.2); f = 0:0.001:0.2; g = grpdelay(be,ae,f,2); % Equalize only the pass...

2 years ago | 0

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Answered
Converting 4th order IIR filter to SOS (second-order sections)
Does tf2sos provide the desired result?

2 years ago | 0

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Answered
Why is there no Integrator with data type single ?
How about using a Discrete Time Integrator?

2 years ago | 0

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How do create a simulink filter if I have the impulse response
Hi Joe, Why not derive the transfer function H(s) as the Laplace transform of h(t), and then implement H(s) in the Transfer Fcn...

2 years ago | 0

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Compute conditional mean from distribution
Hi Fredrik, If you just want to compute the conditional mean, why not just use the third expression for Conditional Expectation...

2 years ago | 0

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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...

2 years ago | 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...

2 years ago | 1

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Answered
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...

2 years ago | 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...

2 years ago | 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));

2 years ago | 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...

2 years ago | 0

Answered
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...

2 years ago | 0

Answered
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

2 years ago | 0