Having Problems with Parameter Estimation Toolbox

Hope everyone is doing well.

I am trying to estimate the transfer function of a DC Motor with the Parameter Estimator App.

I have the following Reference vs Response data, which is saved into separate arrays. I also have the tout information as well.

I wanted to estimate the transfer function of the DC Motor with the Parameter Estimator App. However, when I open the app, here is my window:

I cannot choose the input data, as it is apparent from the window. In addition to that, I cannot add any variable from the Workspace, the window only allows me to choose signals from the Simulink Diagram. I cannot proceed to estimation due to those errors. Can you help me with that?

[Aditya]

Same problem with 2023(a) version, no input data option coming.

Answer 1

[Saarthak Gupta]

Hi Kaan,

It looks like you are unable to import time series data (input and output signals) to the Parameter Estimation App.

It would help if you could share the MATLAB Version you are working with. It can be obtained using the “ver” command.

ver

-----------------------------------------------------------------------------------------------------
MATLAB Version: 23.2.0.2463057 (R2023b) Update 5
MATLAB License Number: 0
Operating System: Linux 5.4.233-0504233-generic #202302250651 SMP Sat Feb 25 12:26:27 UTC 2023 x86_64
Java Version: Java 1.8.0_292-b10 with AdoptOpenJDK OpenJDK 64-Bit Server VM mixed mode
-----------------------------------------------------------------------------------------------------
MATLAB                                                Version 23.2        (R2023b)
Simulink                                              Version 23.2        (R2023b)
5G Toolbox                                            Version 23.2        (R2023b)
Aerospace Blockset                                    Version 23.2        (R2023b)
Aerospace Toolbox                                     Version 23.2        (R2023b)
Antenna Toolbox                                       Version 23.2        (R2023b)
Audio Toolbox                                         Version 23.2        (R2023b)
Automated Driving Toolbox                             Version 23.2        (R2023b)
Bioinformatics Toolbox                                Version 23.2        (R2023b)
Bluetooth Toolbox                                     Version 23.2        (R2023b)
Communications Toolbox                                Version 23.2        (R2023b)
Computer Vision Toolbox                               Version 23.2        (R2023b)
Control System Toolbox                                Version 23.2        (R2023b)
Curve Fitting Toolbox                                 Version 23.2        (R2023b)
DO Qualification Kit                                  Version 23.2        (R2023b)
DSP System Toolbox                                    Version 23.2        (R2023b)
Database Toolbox                                      Version 23.2        (R2023b)
Datafeed Toolbox                                      Version 23.2        (R2023b)
Deep Learning Toolbox                                 Version 23.2        (R2023b)
Econometrics Toolbox                                  Version 23.2        (R2023b)
Embedded Coder                                        Version 23.2        (R2023b)
Filter Design HDL Coder                               Version 23.2        (R2023b)
Financial Instruments Toolbox                         Version 23.2        (R2023b)
Financial Toolbox                                     Version 23.2        (R2023b)
Fixed-Point Designer                                  Version 23.2        (R2023b)
Fuzzy Logic Toolbox                                   Version 23.2        (R2023b)
Global Optimization Toolbox                           Version 23.2        (R2023b)
HDL Coder                                             Version 23.2        (R2023b)
HDL Verifier                                          Version 23.2        (R2023b)
IEC Certification Kit                                 Version 23.2        (R2023b)
Image Acquisition Toolbox                             Version 23.2        (R2023b)
Image Processing Toolbox                              Version 23.2        (R2023b)
Industrial Communication Toolbox                      Version 23.2        (R2023b)
Instrument Control Toolbox                            Version 23.2        (R2023b)
LTE Toolbox                                           Version 23.2        (R2023b)
MATLAB Compiler                                       Version 23.2        (R2023b)
MATLAB Compiler SDK                                   Version 23.2        (R2023b)
MATLAB Report Generator                               Version 23.2        (R2023b)
Mapping Toolbox                                       Version 23.2        (R2023b)
Mixed-Signal Blockset                                 Version 23.2        (R2023b)
Model Predictive Control Toolbox                      Version 23.2        (R2023b)
Navigation Toolbox                                    Version 23.2        (R2023b)
Optimization Toolbox                                  Version 23.2        (R2023b)
Parallel Computing Toolbox                            Version 23.2        (R2023b)
Partial Differential Equation Toolbox                 Version 23.2        (R2023b)
Phased Array System Toolbox                           Version 23.2        (R2023b)
Powertrain Blockset                                   Version 23.2        (R2023b)
Predictive Maintenance Toolbox                        Version 23.2        (R2023b)
RF Blockset                                           Version 23.2        (R2023b)
RF Toolbox                                            Version 23.2        (R2023b)
Requirements Toolbox                                  Version 23.2        (R2023b)
Risk Management Toolbox                               Version 23.2        (R2023b)
Robotics System Toolbox                               Version 23.2        (R2023b)
Robust Control Toolbox                                Version 23.2        (R2023b)
Sensor Fusion and Tracking Toolbox                    Version 23.2        (R2023b)
SerDes Toolbox                                        Version 23.2        (R2023b)
Signal Processing Toolbox                             Version 23.2        (R2023b)
SimBiology                                            Version 23.2        (R2023b)
SimEvents                                             Version 23.2        (R2023b)
Simscape                                              Version 23.2        (R2023b)
Simscape Driveline                                    Version 23.2        (R2023b)
Simscape Electrical                                   Version 23.2        (R2023b)
Simscape Fluids                                       Version 23.2        (R2023b)
Simscape Multibody                                    Version 23.2        (R2023b)
Simulink 3D Animation                                 Version 23.2        (R2023b)
Simulink Check                                        Version 23.2        (R2023b)
Simulink Code Inspector                               Version 23.2        (R2023b)
Simulink Coder                                        Version 23.2        (R2023b)
Simulink Control Design                               Version 23.2        (R2023b)
Simulink Coverage                                     Version 23.2        (R2023b)
Simulink Design Optimization                          Version 23.2        (R2023b)
Simulink Design Verifier                              Version 23.2        (R2023b)
Simulink Desktop Real-Time                            Version 23.2        (R2023b)
Simulink PLC Coder                                    Version 23.2        (R2023b)
Simulink Real-Time                                    Version 23.2        (R2023b)
Simulink Report Generator                             Version 23.2        (R2023b)
Simulink Test                                         Version 23.2        (R2023b)
Stateflow                                             Version 23.2        (R2023b)
Statistics and Machine Learning Toolbox               Version 23.2        (R2023b)
Symbolic Math Toolbox                                 Version 23.2        (R2023b)
System Identification Toolbox                         Version 23.2        (R2023b)
Text Analytics Toolbox                                Version 23.2        (R2023b)
Vehicle Dynamics Blockset                             Version 23.2        (R2023b)
Vehicle Network Toolbox                               Version 23.2        (R2023b)
Vision HDL Toolbox                                    Version 23.2        (R2023b)
WLAN Toolbox                                          Version 23.2        (R2023b)
Wavelet Toolbox                                       Version 23.2        (R2023b)
Wireless HDL Toolbox                                  Version 23.2        (R2023b)

It appears that you might be using an outdated version of MATLAB, potentially prior to MATLAB R2015a. In this version, the Parameter Estimation Toolbox lacks the capability to import signals from external sources such as the MATLAB Workspace or CSV/excel files. I suggest updating to a more recent version of MATLAB that allows importing data from external sources.

The above window is from MATLAB R2023b.

In case you choose to upgrade to MATLAB R2015a or R2015aSP1, please know that there is a known bug that causes an error when time-series data is imported in the Parameter Estimation App. You can find the bug report along with the relevant fix here: https://www.mathworks.com/support/bugreports/details/1241702

Refer to the following MATLAB documentation for further reference:

• ver: https://www.mathworks.com/help/matlab/ref/ver.html

Hope this helps!

Best regards,

Saarthak