Online Frequency Response Estimation

Real-time estimation of frequency response of physical plant

Simulink^® Control Design™ lets you measure the frequency response of your system in operation. The block performs an experiment that injects signals into the plant and measures the plant output. If you have a code-generation product such as Simulink Coder™, you can generate code that implements the estimation algorithm on hardware. Deploying the algorithm to hardware lets you measure the frequency response of a physical plant in real time. To get started, see Online Frequency Response Estimation Basics.

Blocks

Frequency Response Estimator	Estimate plant frequency responses during simulation or in real time
Start-Stop Generator	Generate start-stop signal used by signal generation, estimation, and autotuning blocks (Since R2024a)

Topics

Online Frequency Response Estimation Basics
The Frequency Response Estimator block lets you measure the frequency response of a system in operation.
Online Estimation Using Plant Modeled in Simulink
Use the Frequency Response Estimator block to estimate the frequency response of a plant modeled in Simulink while the model is running.
Deploy Frequency Response Estimation Algorithm for Real-Time Use
Deploy online frequency response estimation as a standalone application for real-time tuning against your physical system.

Featured Examples

Online Frequency Response Estimation During Simulation

Perform online frequency response estimation during model simulation using the Frequency Response Estimator block.

Open Model

Online Estimation of Frequency Responses of a Nonlinear Plant

Use the Frequency Response Estimator block to perform online estimation of a nonlinear plant at different nominal operating points.

Open Script

Collect Frequency Response Experiment Data for Offline Estimation

Use the Frequency Response Estimator block to perform a frequency response estimation experiment and store the data for later estimation offline.

Open Model

Online Frequency Response Estimation Using PRBS Input Signals

Use the Frequency Response Estimator block to perform online and offline estimation using PRBS input signals.

Since R2023b
Open Live Script

Identify Frequency Domain Features Using Frequency Response Estimator Block

Identify frequency domain features of interest using the PRBS input signals.

Since R2023b
Open Live Script