Beantwortet
Matlab ilaplace not working properly
ilaplace can return a closed form, symbolic expression if we give it some help, though it's a bit of a mess. Unclear why it need...

fast 2 Jahre vor | 1

| akzeptiert

Beantwortet
how to find a function written as a series
Would be nice to see the actual mathematical equation to be solved. Assuming the equation and solution follows the exposition at...

fast 2 Jahre vor | 0

| akzeptiert

Beantwortet
How to extract the term associated with a symbolic variable and assign to another symbolic variable?
syms R_v L_v L_ph U_s U_i w s U_sr U_si real; syms Z_v Z Y S; U_s = U_sr + 1i*U_si; U_i = 1 + 1i*0; s = s + 1i*w; Z_v = R_v...

fast 2 Jahre vor | 0

Beantwortet
simplify() with dirac and All = true Doesn't Work?
Fixed in 2024b: syms x real simplify(dirac(x)) % works simplify(dirac(x),'All',true) % now works

fast 2 Jahre vor | 0

| akzeptiert

Frage

Is Code Not Running on Answers?
Is code not running on Answers? Every time I hit the run button, the page hangs with the red square instead of the greeen triang...

fast 2 Jahre vor | 0 Antworten | 0

0

Antworten

Beantwortet
LQI controller is weirdly slow in response and doesn't always reach a goal on plant
Following up from this comment, we have established that the plant is modeled in disctete-time with sampling period Ts = 0.02 s....

fast 2 Jahre vor | 0

Beantwortet
Identifying the Mimo system using two inputs and two outputs
Try ssest to identify the model as a state-space system. You can then convert that to transfer function if absolutely necessary....

fast 2 Jahre vor | 0

Beantwortet
Issue regarding the result from symbolic computation
Hi ArxIv, Expectations might be too high for symbolic solutions of eigenvectors. Consider a simpler, but very closely related ...

fast 2 Jahre vor | 2

| akzeptiert

Beantwortet
Root Locus from equation?
In order to use rlocus, we need to get the characteristic equation in a form of 1 + u^2*N(s)/D(s) = 0. Start with the equation ...

fast 2 Jahre vor | 0

Beantwortet
how to extract a list of unique words from a set of one row strings
If UpdatedDocuments is a 1D cell array of chars ... UpdatedDocuments{1} = 'one,two,three,one'; UpdatedDocuments{2} = 'one,two,...

fast 2 Jahre vor | 0

Beantwortet
How to edit the "▲" marks on the Nyquist plot and change only the lines in the negative frequency range to dashed lines
"Probably the easiest way to do this would be to use the output argument form of nyquist and then make the plot from the outputs...

fast 2 Jahre vor | 0

Beantwortet
Accessing workspace variables with parallel workers
It sounds like q_e2b0 is supposed to be a base workspace variable that's not really a variable that's used in the simulation, li...

fast 2 Jahre vor | 0

Beantwortet
Use the symbolic toolbox of Matlab to calculate the energy of the signals x(t) and f(t). Verify theoretically. How is the energy of these two signals related?
syms x(t) assume(t,'real'); x(t) = exp(t)/2*rectangularPulse(0,2,t) + (2*t - 8)*rectangularPulse(2,4,t) Energy in real-valued...

fast 2 Jahre vor | 0

Beantwortet
Total energy in Time and Frequency Dimain
Define a real-valued, finite duration signal of length N, assumed to be uniformly spaced samples collected as Fs = 2000 Hz rng(...

fast 2 Jahre vor | 0

Beantwortet
energy of a signal in t and f domain
For a finite duration signal x[n] of length N, and its Discrete Fourier Transform (DFT) X[k] (as computed by fft), the energy re...

fast 2 Jahre vor | 0

Beantwortet
When K=dlqr(Ad,Bd,Q,R) is used, Ad,Bd is already discretized, why not Q,R?
According to dlqr, the Q and R matrices input to the function define the discrete-time quadratic cost function sum. In that sens...

fast 2 Jahre vor | 0

Beantwortet
how to convert signal to physical signal in matlab
Mabye PS-Simulink Converter and/or Simulink-PS Converter is what you're looking for.

fast 2 Jahre vor | 0

Beantwortet
Coordinate Transformation in Rotational System Equations (Spacecraft Dynamics Block)
Hi Gökhan, Why do you think that the equation is written in inertial (i.e. ICRF) frame. It looks to me like that equation is th...

fast 2 Jahre vor | 0

Beantwortet
solving a nonlinear equation with complex numbers
Does this solution work? syms R syms X Zo = sym(50); Z=(R*1i*X/(R+1i*X)); r=(Z-Zo)/(Z+Zo); assume(R,'positive') assume(...

fast 2 Jahre vor | 1

Beantwortet
Fourier Transform of e^jkt, not giving an answer
Need to specify that K is real. Also, if only using two arguments to fourier the second argument is the transform variable, so s...

fast 2 Jahre vor | 0

Beantwortet
Second argument must be a scalar or vector of unique symbolic variables.
No error if running here w/2024b, nor did I get an error running on my local machine with 2024a syms X; syms gamma; syms Y; ...

fast 2 Jahre vor | 0

Beantwortet
FFT result dependent on number of interpolation points
Hi Ali, The doc page for interpft states: "interpft(x,n) interpolates the Fourier transform of the function values in X to pro...

fast 2 Jahre vor | 0

Beantwortet
How to get the datatype from the signal line to excel after compiling the model?
Hi jenny, Signal names on the outputs of a block can be found via: names = get_param(block,'OutputSignalNames'); The port (in...

fast 2 Jahre vor | 0

Beantwortet
Finding the sample time of a Simulink signal/line programmatically with Simulink.Block.getSampleTimes
Hi Andrew, If the block has multiple outputs, like in your case, check out ts.ComponentSampleTimes which should be an array o...

fast 2 Jahre vor | 0

Beantwortet
Not getting desired signal when I multiply sine wave and pulse generator in Simulink
Hi Deepankar, If the question shows the full model, then we can see it has no continuous states. The solver will be VariableSte...

fast 2 Jahre vor | 0

Beantwortet
Plotting DTFT in Matlab
L = 1000; fg = 1000; fs = 100000; T = 1/fs; tmin = 0; K = 1; n = tmin:L; t = n*T; %Base function calculation x = xdp1(K...

fast 2 Jahre vor | 0

Beantwortet
Accessing struct variable data inside MATLAB function block in Simulink
Hi Jacob, The typical way to define a parameter in a Matlab Function block is described at Use Data in Multiple MATLAB Function...

fast 2 Jahre vor | 0

| akzeptiert

Beantwortet
Unable to get sym(pi) to output Pi in matlab
Check your sympref sympref Make sure that FloatingPointOutput is set to False.

fast 2 Jahre vor | 2

Beantwortet
Symbolic Piecewise Addition Issue
Seems to work here. How does the singz function work insofar as the output argument, func, is not defined inside the function. ...

fast 2 Jahre vor | 0

Beantwortet
Given the spectrum of a signal x(t) , What is the minimum sample rate that would allow for x[n] to be recoverable?
Hi Zhen, Your question isn't really about Matlab. You might get more traction on a signal processing forum, like dsp.stackexcha...

fast 2 Jahre vor | 0