Contribute at least one answer each month for 36 consecutive months
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Accept 20 answers given by other contributors
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Awarded to Paul on 24 Oct 2020
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Awarded to Paul on 18 Jan 2013
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已回答
In simulink, how can I make a parameter of a simulink block continuously updated during the simulation time by MATLAB function block?
Hi Yeonghoon, One option to try would be the Parameter Writer. Don't know if the particular block and block parameter in questi...
In simulink, how can I make a parameter of a simulink block continuously updated during the simulation time by MATLAB function block?
Hi Yeonghoon, One option to try would be the Parameter Writer. Don't know if the particular block and block parameter in questi...
1 day 前 | 0
已回答
Why does this integral of a relatively well behaved function return NaN values?
Hi Ryan, I think that individual terms in the integrand blow up to inf when evaluating in double precision. u = 10^6; % unit c...
Why does this integral of a relatively well behaved function return NaN values?
Hi Ryan, I think that individual terms in the integrand blow up to inf when evaluating in double precision. u = 10^6; % unit c...
2 days 前 | 1
| 已接受
已回答
ECEF 6DOF block - integrator initial conditions
Hi Thomas, Are you referring to 6DOF ECEF (Quaternion)? What exactly do you mean by the "body rate integrator"? Are you loggin...
ECEF 6DOF block - integrator initial conditions
Hi Thomas, Are you referring to 6DOF ECEF (Quaternion)? What exactly do you mean by the "body rate integrator"? Are you loggin...
5 days 前 | 0
已回答
Filter Z Transform Manipulation
Define a filiter in Signal Processing Toolbox (SPT) and plot the frequency response fc = 300; fs = 1000; [b,a] = butter(6,fc/...
Filter Z Transform Manipulation
Define a filiter in Signal Processing Toolbox (SPT) and plot the frequency response fc = 300; fs = 1000; [b,a] = butter(6,fc/...
6 days 前 | 0
已回答
discontinuous differential equations using inverse z transform?
It appears the goal is to derive a difference equation from the corresponding, discrete-time, transfer function. Define the tra...
discontinuous differential equations using inverse z transform?
It appears the goal is to derive a difference equation from the corresponding, discrete-time, transfer function. Define the tra...
6 days 前 | 0
已回答
Problem using variable='z^-1' in Z transform with Z^-1 format
When specifying a tf in with Variable='z', the num and den are interpreted as being coefficients of descending powers of z num=...
Problem using variable='z^-1' in Z transform with Z^-1 format
When specifying a tf in with Variable='z', the num and den are interpreted as being coefficients of descending powers of z num=...
6 days 前 | 0
已回答
How do you get a symbolic answer for this z transform in MATLAB
With the default symbolic preferences sympref('default'); We have heaviside(0),disp(char(ans)) So the discrete-time unit ste...
How do you get a symbolic answer for this z transform in MATLAB
With the default symbolic preferences sympref('default'); We have heaviside(0),disp(char(ans)) So the discrete-time unit ste...
6 days 前 | 0
已回答
How to convert state space to transfer function.
See this answer for how to represent the state space model in the Control Systems Toolbox.
How to convert state space to transfer function.
See this answer for how to represent the state space model in the Control Systems Toolbox.
6 days 前 | 0
| 已接受
已回答
How can I plot a correct fft of cosine wave?
The problem statement is to plot the Fourier Transform of a cosine (cos(2*pi*t)), but sampled with sample frequency of fs=12Hz. ...
How can I plot a correct fft of cosine wave?
The problem statement is to plot the Fourier Transform of a cosine (cos(2*pi*t)), but sampled with sample frequency of fs=12Hz. ...
7 days 前 | 0
已回答
Adding 0 value place holders to string array
s= [ "0, 74, 46, 94" "7, 64, 8" "8, 50, 32, 70" "6, 43" "3, 55, 47"] c = count(s,",") s = arrayfun(@(s,c) join([s,repmat...
Adding 0 value place holders to string array
s= [ "0, 74, 46, 94" "7, 64, 8" "8, 50, 32, 70" "6, 43" "3, 55, 47"] c = count(s,",") s = arrayfun(@(s,c) join([s,repmat...
9 days 前 | 0
| 已接受
已回答
Problem with ctrbf() and its answer
Check the doc page ctrbf to see how A_bar etc. are arranged in terms of the uncontrollable and controllable portions.
Problem with ctrbf() and its answer
Check the doc page ctrbf to see how A_bar etc. are arranged in terms of the uncontrollable and controllable portions.
13 days 前 | 0
已回答
Open loop stability: Bode - Pole zero plot mismatch
Use the open-loop system developed by @Arkadiy Turevskiy in this comment sys=zpk([2.4*10^9*j -2.4*10^9*j], [-0.0000001 -11.5*10...
Open loop stability: Bode - Pole zero plot mismatch
Use the open-loop system developed by @Arkadiy Turevskiy in this comment sys=zpk([2.4*10^9*j -2.4*10^9*j], [-0.0000001 -11.5*10...
13 days 前 | 0
已回答
Complex variable substitution using Symbolic Toolbox no working as expected.
% Define symbolic variables syms R81 R79 R80 C37 C67 T z fs %complex syms w s % complex % Define the frequency-domain transfe...
Complex variable substitution using Symbolic Toolbox no working as expected.
% Define symbolic variables syms R81 R79 R80 C37 C67 T z fs %complex syms w s % complex % Define the frequency-domain transfe...
14 days 前 | 0
| 已接受
已回答
How to get PD parameters
Hi Hasan, Let's take a look at the code. s = tf('s'); Gp = 2 / (0.2 * s + 1); %pump Gv = (2.2 * 10^-3) * 2; %valve Gt = 2...
How to get PD parameters
Hi Hasan, Let's take a look at the code. s = tf('s'); Gp = 2 / (0.2 * s + 1); %pump Gv = (2.2 * 10^-3) * 2; %valve Gt = 2...
14 days 前 | 0
已回答
Inverse fft doesn't match analytical formulation
Let's take things one step at a time and see where they lead. If we have Continous-Time Fourier Transform (CTFT) F(w) = 1/w^2 ...
Inverse fft doesn't match analytical formulation
Let's take things one step at a time and see where they lead. If we have Continous-Time Fourier Transform (CTFT) F(w) = 1/w^2 ...
19 days 前 | 1
提问
What are All of the Variables in the Workspace on Answers?
What are all of these and should they be here? whos In particular, having an empty double named 'i' is not good as that can sc...
19 days 前 | 1 个回答 | 0
1
个回答提问
Why is Documentation Missing When Installed Locally?
I have the documentation installed locally, but I just noticed that doc can't find the documenation for the Statistics and Machi...
20 days 前 | 1 个回答 | 0
1
个回答已回答
Gradient Vector for partial derivative seems backward for dfdx
Hi Kevin, It turns out that nDfy only gives the correct result because of the symmetry. xo = 0.8; yo = 0.2; h = 0.01; ...
Gradient Vector for partial derivative seems backward for dfdx
Hi Kevin, It turns out that nDfy only gives the correct result because of the symmetry. xo = 0.8; yo = 0.2; h = 0.01; ...
20 days 前 | 1
| 已接受
已回答
PID Controller Design by Pole Assignment
Hi Bahadir, I'm not sure if the code is implementing what it should, but the reason the result is coming back with Ki = bres = ...
PID Controller Design by Pole Assignment
Hi Bahadir, I'm not sure if the code is implementing what it should, but the reason the result is coming back with Ki = bres = ...
20 days 前 | 1
| 已接受
已回答
Step response of transfer function different in ODE45 than in 'step' and 'lsim'
Hi dikkemulle, The compensation is different between the two cases. For the ode45 implementation (ignoring v_desired for simp...
Step response of transfer function different in ODE45 than in 'step' and 'lsim'
Hi dikkemulle, The compensation is different between the two cases. For the ode45 implementation (ignoring v_desired for simp...
20 days 前 | 1
| 已接受
已回答
M,C and K into state space model
mechss doesn't work? sys = mechss(M,D,K,B,F,[],[])
M,C and K into state space model
mechss doesn't work? sys = mechss(M,D,K,B,F,[],[])
24 days 前 | 0
已回答
multiply a matrix into every block matrix in a big matrix
Check out blockproc. Example data H = [1,2;3,4]; rng(100); A = rand(4,6); Result R = blockproc(A,[2 2],@(B) H*B.data) Che...
multiply a matrix into every block matrix in a big matrix
Check out blockproc. Example data H = [1,2;3,4]; rng(100); A = rand(4,6); Result R = blockproc(A,[2 2],@(B) H*B.data) Che...
25 days 前 | 0
已回答
Can you call Simulink models recursively?
Hi Jan, I think the Tapped Delay block is exactly what you need.
Can you call Simulink models recursively?
Hi Jan, I think the Tapped Delay block is exactly what you need.
25 days 前 | 0
已回答
Simulating the impulse response of a higher order filter.
Hi @saqib, You're probably running into issues with numerical accuracy because the coefficients in the system are so large. Ge...
Simulating the impulse response of a higher order filter.
Hi @saqib, You're probably running into issues with numerical accuracy because the coefficients in the system are so large. Ge...
27 days 前 | 0
已回答
why am I Unable to overplot a line on a surface plot?
Can't recreate on Answers what you're seeing when using surface. However, I think you get what you're lookng for by using pcolor...
why am I Unable to overplot a line on a surface plot?
Can't recreate on Answers what you're seeing when using surface. However, I think you get what you're lookng for by using pcolor...
27 days 前 | 0
| 已接受
已回答
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...
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...
27 days 前 | 1
| 已接受
已回答
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...
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...
27 days 前 | 0
| 已接受
已回答
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...
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...
29 days 前 | 0
已回答
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
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
29 days 前 | 0
| 已接受
提问
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...
1 month 前 | 0 个回答 | 0
0
个回答
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