Here, the blocks connected to the inputs and outputs of the Frequency Response
Estimator block represent hardware interfaces that read or write real-time data for your
system. For example, the Read control signal block can be an interface for receiving
serial data, a UDP Receive block for receiving UDP packets, or an interface for receiving
other signals via wireless network. Similarly the blocks for writing data, such as Write
plant input, can be interfaces for serial, UDP, or other interfaces for writing data to
hardware.The default ports of the Frequency Response Estimator block are:- u — Receives the control signal.
- y — Receives the plant output.
- start/stop — Receives the signal that begins and ends the estimation experiment.
- u + Δu — Outputs the signal to feed to the plant input. When the experiment is not
running, u + Δu outputs the control signal as received at u. When the experiment is
running, the block adds the perturbation Δu to this signal. - data — Outputs the simulation data collected during the estimation experiment. This
data includes the perturbation applied to the plant input and the response received at
y.
6 Online Frequency Response Estimation