Answered

Aerodynamic forces and moments

The doc page Aerodynamic Forces and Moments states that the outputs of the block are: Port_1 — Aerodynamic forces Aerodynamic ...

Aerodynamic forces and moments

The doc page Aerodynamic Forces and Moments states that the outputs of the block are: Port_1 — Aerodynamic forces Aerodynamic ...

25 dagen ago | 0

Answered

What's the correct syntax to set-up discrete convolution ?

The variable B contains one or more NaN values. Use isnan to find which ones and then review the the corresponding inputs to be...

What's the correct syntax to set-up discrete convolution ?

The variable B contains one or more NaN values. Use isnan to find which ones and then review the the corresponding inputs to be...

25 dagen ago | 0

Answered

How to interpret the amplitude of impulse() results

It sounds like the code needs to account for the difference between the convolution sum, as computed by conv, and the convolutio...

How to interpret the amplitude of impulse() results

It sounds like the code needs to account for the difference between the convolution sum, as computed by conv, and the convolutio...

26 dagen ago | 0

Answered

Cannot compute the root locus of models with complex data

Well, you can always loop through values of K and for each value of K solve for s that satisfies den(s) + K*num(s) = 0 and plo...

Cannot compute the root locus of models with complex data

Well, you can always loop through values of K and for each value of K solve for s that satisfies den(s) + K*num(s) = 0 and plo...

26 dagen ago | 0

Answered

How to make double array representation as complex array with null imaginary number ?

In general, use complex A = rand(2); C = complex(A,0) If you have multiple real arrays stored in cells of a cell array, you c...

How to make double array representation as complex array with null imaginary number ?

In general, use complex A = rand(2); C = complex(A,0) If you have multiple real arrays stored in cells of a cell array, you c...

27 dagen ago | 1

Answered

Running main model with fixed step solver and subsystem with variable step solver

R2022a introduced the concept of a "Local Solver" when using referenced models, which might be what you're looking for. This blo...

Running main model with fixed step solver and subsystem with variable step solver

R2022a introduced the concept of a "Local Solver" when using referenced models, which might be what you're looking for. This blo...

27 dagen ago | 0

Answered

How to import multiple .mat files to workspace?

Why use the -ascii option to load a .mat file? If that's not the problem, please edit your question by copy/pasting the entire e...

How to import multiple .mat files to workspace?

Why use the -ascii option to load a .mat file? If that's not the problem, please edit your question by copy/pasting the entire e...

27 dagen ago | 0

Answered

how to compute duration of the signal

If a Matlab vector x is a subsequence of a discrete-time signal x[n], and if it's assumed that x[n] = 0 for all values of n outs...

how to compute duration of the signal

If a Matlab vector x is a subsequence of a discrete-time signal x[n], and if it's assumed that x[n] = 0 for all values of n outs...

28 dagen ago | 0

Answered

How to manually simulate linear system without lsim

Hi Valeriy, As indicated, the system in question is a differential equation model of a continuous-time sytem. This line of co...

How to manually simulate linear system without lsim

Hi Valeriy, As indicated, the system in question is a differential equation model of a continuous-time sytem. This line of co...

28 dagen ago | 0

| accepted

Answered

Identified linear system contribution of input is zero

The commands do influence the position of the motor through the dynamics as described by the differential equation. The output o...

Identified linear system contribution of input is zero

The commands do influence the position of the motor through the dynamics as described by the differential equation. The output o...

29 dagen ago | 0

| accepted

Answered

Comparing coefficients and solving equation

syms x a b eqn = x^2 + 2*x + 5 == (b+4*a)*x^2 + (5*a+b)*x + (-b+2*a) cleft = coeffs(lhs(eqn),x,'all') cright = coeffs(rhs(eqn...

Comparing coefficients and solving equation

syms x a b eqn = x^2 + 2*x + 5 == (b+4*a)*x^2 + (5*a+b)*x + (-b+2*a) cleft = coeffs(lhs(eqn),x,'all') cright = coeffs(rhs(eqn...

29 dagen ago | 0

Answered

reproduces the audio signal after sampling!!!

Hi Vu, I wasn't familiar with derivative sampling, or generalized sampling, until I saw your post. After a bit of reading, mayb...

reproduces the audio signal after sampling!!!

Hi Vu, I wasn't familiar with derivative sampling, or generalized sampling, until I saw your post. After a bit of reading, mayb...

30 dagen ago | 1

Question

How to Convert a Scalar Struct with Vector Fields to a Vector Struct with Scalar Fields?

I have a scalar struct S with each field a row vector of the same number of elements. S.x = [1 2]; S.y = [10 20]; I want crea...

ongeveer een maand ago | 3 answers | 0

Question

Can hgtransform be Used with a Constant Line Object?

This code runs fine on my machine with 2022a. Generates an error here with 2024a. Didn't see anything in the release notes to su...

ongeveer een maand ago | 1 answer | 1

Answered

Plot a vector with a given angle against the y-axis

Something like this? Note that the line won't won't resize if the axes are resized. If you want something like that, you might...

Plot a vector with a given angle against the y-axis

Something like this? Note that the line won't won't resize if the axes are resized. If you want something like that, you might...

ongeveer een maand ago | 0

Answered

reproduces the audio signal after sampling!!!

The Fourier transform of each of those impulse responses can be found as follows. See also this thread for related discussion. ...

reproduces the audio signal after sampling!!!

The Fourier transform of each of those impulse responses can be found as follows. See also this thread for related discussion. ...

ongeveer een maand ago | 0

Answered

copy subplots within same figure

Hi William, Use the subplot command as shown below to get the new axes aligned with the old. The legends need to be copyobj'd a...

copy subplots within same figure

Hi William, Use the subplot command as shown below to get the new axes aligned with the old. The legends need to be copyobj'd a...

ongeveer een maand ago | 1

| accepted

Answered

Trying to add Butterworth filter after fft to obtain only some of the original signal.

Hi Alejandro, The input to filter should be the time domain sequence to be filtered, not its Fourier transform. So I guess tha...

Trying to add Butterworth filter after fft to obtain only some of the original signal.

Hi Alejandro, The input to filter should be the time domain sequence to be filtered, not its Fourier transform. So I guess tha...

ongeveer een maand ago | 0

| accepted

Answered

How to simulate control loop with sustained oscillation

Hi banghyun jo, Describing function analysis relies on the Nyquist plot of the open-loop system, not the closed-loop system. If...

How to simulate control loop with sustained oscillation

Hi banghyun jo, Describing function analysis relies on the Nyquist plot of the open-loop system, not the closed-loop system. If...

ongeveer een maand ago | 0

Answered

Matrix versus Scalar Input Into Functions Using Symbolic Toolbox

Hi Sam, syms x A = [2 4 ; 1 5] ; % Polynomial q(x) = x^2 + 2*x + 15 ; As was noted above by @Voss and @Ayush Anand and @Ni...

Matrix versus Scalar Input Into Functions Using Symbolic Toolbox

Hi Sam, syms x A = [2 4 ; 1 5] ; % Polynomial q(x) = x^2 + 2*x + 15 ; As was noted above by @Voss and @Ayush Anand and @Ni...

ongeveer een maand ago | 1

| accepted

Answered

Simulating linear model, can't understand error

Hi Valeriy, Because the B matrix has one column, the input to the system is a scalar. Hence the U input to lsim should have on...

Simulating linear model, can't understand error

Hi Valeriy, Because the B matrix has one column, the input to the system is a scalar. Hence the U input to lsim should have on...

ongeveer een maand ago | 0

| accepted

Answered

Why does robstab fail for systems with more than two zeros?

Hi Suleyman, Generally speaking, it's best to avoid "transfer function algebra." Instead, use model construction and interconne...

Why does robstab fail for systems with more than two zeros?

Hi Suleyman, Generally speaking, it's best to avoid "transfer function algebra." Instead, use model construction and interconne...

ongeveer een maand ago | 0

| accepted

Answered

How to put existing figures in one figure together?

If subplot layout is acceptable, then ... % open the fig files in two new figures f1 = openfig('fig1.fig','Invisible'); f2 = ...

How to put existing figures in one figure together?

If subplot layout is acceptable, then ... % open the fig files in two new figures f1 = openfig('fig1.fig','Invisible'); f2 = ...

ongeveer een maand ago | 1

Answered

The mathematical expressions resulting from two different symbolic computations are significantly different.

Case 2 can be much simplified. Were you expecting the simplified result to be returned? clear syms a b X Y c Z K M m l; X=sy...

The mathematical expressions resulting from two different symbolic computations are significantly different.

Case 2 can be much simplified. Were you expecting the simplified result to be returned? clear syms a b X Y c Z K M m l; X=sy...

ongeveer een maand ago | 1

| accepted

Question

When Should Generalized eig() Solver be Used for Ordinary eig() Problems?

Consider the following matrix: z = sqrt(sym(2)); z1 = sqrt(sym(3)); Asym = [-z, -z^2/z1; z1, z] It has a repeated eigenvalue...

ongeveer een maand ago | 1 answer | 0

Answered

How do I extract one point from a piecewise function?

Hi Allie, If M_xy and M_xz are sym objects, like so syms t M_xy = piecewise(t < 0, 0, t > 0, t); M_xz = piecewise(t < 0, 0, ...

How do I extract one point from a piecewise function?

Hi Allie, If M_xy and M_xz are sym objects, like so syms t M_xy = piecewise(t < 0, 0, t > 0, t); M_xz = piecewise(t < 0, 0, ...

ongeveer een maand ago | 0

Answered

Simulink presenting a convergence error

Setting the fixed-step solver to ode8 seems to work pretty well for the problem shown in the question with a fixed step of 0.01....

Simulink presenting a convergence error

Setting the fixed-step solver to ode8 seems to work pretty well for the problem shown in the question with a fixed step of 0.01....

ongeveer 2 maanden ago | 1

| accepted

Answered

symmetric solutions of linear matrix equations

Here's an alternative using mldivide, \ that arrives at the same result for this particular problem. Is it effectively the same ...

symmetric solutions of linear matrix equations

Here's an alternative using mldivide, \ that arrives at the same result for this particular problem. Is it effectively the same ...

ongeveer 2 maanden ago | 0

Answered

Convolution with a time shifted box function

Hi Nghi, Why should the output of system remain at 1 for t > 2.5? For t > 2.5, the input is 0 and so we'd expect the output to...

Convolution with a time shifted box function

Hi Nghi, Why should the output of system remain at 1 for t > 2.5? For t > 2.5, the input is 0 and so we'd expect the output to...

ongeveer 2 maanden ago | 0

| accepted