System Identification Toolbox

New Topic

1431 topics

Page 47 of 58
- Jump to page:
Previous
1
…
45
46
47
48
49
…
58
Next

Topics

Replies

Views

Last post

The estimate of the expected loss-function improvement at the next iteration is based on the Gauss-Newton vector compute

Last post by fyousefi « Tue Mar 02, 2021 2:37 pm

by fyousefi » Tue Mar 02, 2021 2:37 pm

0 Replies

454 Views

Last post by fyousefi
Tue Mar 02, 2021 2:37 pm
Numerical search method used for iterative parameter estimation

Last post by fyousefi « Tue Mar 02, 2021 2:37 pm

by fyousefi » Tue Mar 02, 2021 2:37 pm

0 Replies

428 Views

Last post by fyousefi
Tue Mar 02, 2021 2:37 pm
A combination of the line search algorithms, ''gn'', ''lm'', ''gna'', and ''grad'' methods is tried in sequence at each

Last post by fyousefi « Tue Mar 02, 2021 2:36 pm

by fyousefi » Tue Mar 02, 2021 2:36 pm

0 Replies

421 Views

Last post by fyousefi
Tue Mar 02, 2021 2:36 pm
The first descent direction leading to a reduction in estimation cost is used.

Last post by fyousefi « Tue Mar 02, 2021 2:36 pm

by fyousefi » Tue Mar 02, 2021 2:36 pm

0 Replies

415 Views

Last post by fyousefi
Tue Mar 02, 2021 2:36 pm
Singular values of the Jacobian matrix less than GnPinvConstant*eps*max(size(J))*norm(J) are discarded when computing th

Last post by fyousefi « Tue Mar 02, 2021 2:35 pm

by fyousefi » Tue Mar 02, 2021 2:35 pm

0 Replies

450 Views

Last post by fyousefi
Tue Mar 02, 2021 2:35 pm
J is the Jacobian matrix. The Hessian matrix is approximated as JTJ.

Last post by fyousefi « Tue Mar 02, 2021 2:35 pm

by fyousefi » Tue Mar 02, 2021 2:35 pm

0 Replies

449 Views

Last post by fyousefi
Tue Mar 02, 2021 2:35 pm
Adaptive subspace Gauss-Newton search. Eigenvalues less than gamma*max(sv) of the Hessian are ignored, where sv contains

Last post by fyousefi « Tue Mar 02, 2021 2:34 pm

by fyousefi » Tue Mar 02, 2021 2:34 pm

0 Replies

433 Views

Last post by fyousefi
Tue Mar 02, 2021 2:34 pm
Adaptive subspace Gauss-Newton search. Eigenvalues less than gamma*max(sv) of the Hessian are ignored, where sv contains

Last post by fyousefi « Tue Mar 02, 2021 2:33 pm

by fyousefi » Tue Mar 02, 2021 2:33 pm

0 Replies

442 Views

Last post by fyousefi
Tue Mar 02, 2021 2:33 pm
The Gauss-Newton direction is computed in the remaining subspace.

Last post by fyousefi « Tue Mar 02, 2021 2:32 pm

by fyousefi » Tue Mar 02, 2021 2:32 pm

0 Replies

410 Views

Last post by fyousefi
Tue Mar 02, 2021 2:32 pm
gamma has the initial value InitialGnaTolerance. This value is increased by the factor LMStep each time the search fails

Last post by fyousefi « Tue Mar 02, 2021 2:31 pm

by fyousefi » Tue Mar 02, 2021 2:31 pm

0 Replies

441 Views

Last post by fyousefi
Tue Mar 02, 2021 2:31 pm
This value is decreased by the factor 2*LMStep each time a search is successful without any bisections.

Last post by fyousefi « Tue Mar 02, 2021 2:30 pm

by fyousefi » Tue Mar 02, 2021 2:30 pm

0 Replies

453 Views

Last post by fyousefi
Tue Mar 02, 2021 2:30 pm
Levenberg-Marquardt least squares search, where the next parameter value is -pinv(H+d*I)*grad from the previous one.

Last post by fyousefi « Tue Mar 02, 2021 2:30 pm

by fyousefi » Tue Mar 02, 2021 2:30 pm

0 Replies

421 Views

Last post by fyousefi
Tue Mar 02, 2021 2:30 pm
H is the Hessian, I is the identity matrix, and grad is the gradient. d is a number that is increased until a lower valu

Last post by fyousefi « Tue Mar 02, 2021 2:29 pm

by fyousefi » Tue Mar 02, 2021 2:29 pm

0 Replies

436 Views

Last post by fyousefi
Tue Mar 02, 2021 2:29 pm
Estimate state-space model using time or frequency data

Last post by fyousefi « Tue Mar 02, 2021 2:29 pm

by fyousefi » Tue Mar 02, 2021 2:29 pm

0 Replies

411 Views

Last post by fyousefi
Tue Mar 02, 2021 2:29 pm
Transfer function with a pair of complex-conjugate poles

Last post by fyousefi « Tue Mar 02, 2021 2:28 pm

by fyousefi » Tue Mar 02, 2021 2:28 pm

0 Replies

427 Views

Last post by fyousefi
Tue Mar 02, 2021 2:28 pm
Transfer function with a real and a pair of complex-conjugate poles

Last post by fyousefi « Tue Mar 02, 2021 2:28 pm

by fyousefi » Tue Mar 02, 2021 2:28 pm

0 Replies

424 Views

Last post by fyousefi
Tue Mar 02, 2021 2:28 pm
The iddata object cannot be converted into a frequency response data object. Use the "etfe" or "spa" command instead.

Last post by fyousefi « Tue Mar 02, 2021 11:44 am

by fyousefi » Tue Mar 02, 2021 11:44 am

0 Replies

480 Views

Last post by fyousefi
Tue Mar 02, 2021 11:44 am
Input/output channel names are not same among concatenated data objects. Those of the first data set will be used in the

Last post by fyousefi « Tue Mar 02, 2021 11:44 am

by fyousefi » Tue Mar 02, 2021 11:44 am

0 Replies

411 Views

Last post by fyousefi
Tue Mar 02, 2021 11:44 am
The data contains more columns (number of channels) than rows (number of samples). Check that the data is not transposed

Last post by fyousefi « Tue Mar 02, 2021 11:43 am

by fyousefi » Tue Mar 02, 2021 11:43 am

0 Replies

396 Views

Last post by fyousefi
Tue Mar 02, 2021 11:43 am
Frequencies with infinite response have been removed from the data.

Last post by fyousefi « Tue Mar 02, 2021 11:43 am

by fyousefi » Tue Mar 02, 2021 11:43 am

0 Replies

413 Views

Last post by fyousefi
Tue Mar 02, 2021 11:43 am
It is recommended to use the "resample" command in place of the "idresamp" command (requires Signal Processing Toolbox(T

Last post by fyousefi « Tue Mar 02, 2021 11:42 am

by fyousefi » Tue Mar 02, 2021 11:42 am

0 Replies

427 Views

Last post by fyousefi
Tue Mar 02, 2021 11:42 am
The period of the PRBS signal was changed to { number,integer}. Accordingly, the length of the generated signal will be

Last post by fyousefi « Tue Mar 02, 2021 11:42 am

by fyousefi » Tue Mar 02, 2021 11:42 am

0 Replies

410 Views

Last post by fyousefi
Tue Mar 02, 2021 11:42 am
When merging two IDFRD models, their frequency vectors must match (taking frequency units into account).

Last post by fyousefi « Tue Mar 02, 2021 11:41 am

by fyousefi » Tue Mar 02, 2021 11:41 am

0 Replies

385 Views

Last post by fyousefi
Tue Mar 02, 2021 11:41 am
Some frequency values in the specified filter are greater than the Nyquist frequency.

Last post by fyousefi « Tue Mar 02, 2021 11:40 am

by fyousefi » Tue Mar 02, 2021 11:40 am

0 Replies

400 Views

Last post by fyousefi
Tue Mar 02, 2021 11:40 am
The filter order must be a positive integer. Absolute value of specified order will be used. Note that the causality of

Last post by fyousefi « Tue Mar 02, 2021 11:40 am

by fyousefi » Tue Mar 02, 2021 11:40 am

0 Replies

471 Views

Last post by fyousefi
Tue Mar 02, 2021 11:40 am

New Topic

1431 topics

Page 47 of 58
- Jump to page:
Previous
1
…
45
46
47
48
49
…
58
Next

Return to Board Index

Who is online

Users browsing this forum: No registered users and 2 guests

Forum permissions

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum