Transfer Function Ex 1-3

Open loop block diagram


Compute a linear model of the combined controller-plant system without the effects of the feedback signal. Use a Bode plot of the resulting linear model to see the open-loop response.

Open Simulink model.

sys = 'watertank'; open_system(sys)

The Water-Tank System block represents the plant in this control system and contains all of the system nonlinearities.

In the Simulink Editor, define the portion of the model to linearize:

  1. Right-click the PID Controller block input signal (the output of the Sum block). Select Linear Analysis Points > Input Perturbation.
  2. Right-click the Water-Tank System output signal, and select Linear Analysis Points > Open-loop Output.

Annotations appear in the model indicating which signals are designated as linearization I/O points.

Open the Linear Analysis Tool for the model.

In the Simulink Editor, select Analysis > Control Design > Linear Analysis.

By default, the I/O points you specified in the model are the selected Analysis I/Os for linearization, as displayed in the Analysis I/Os menu.

Linearize the model with the specified I/Os, and generate a Bode plot of the linearized model.

Click Bode. The Bode plot of the linearized plant appears.

  • Tip Instead of a Bode plot, generate other response types by clicking the corresponding button in the plot gallery.

View the minimum stability margins for the model.

Right-click the plot and select Characteristics > Minimum Stability Margins.

The Bode plot displays the phase margin marker. Click the marker to show a data tip that contains the phase margin value.



Share this article





Related Posts


Open loop diagram
Open loop diagram
Open loop system diagram
Open loop system diagram
Open loop operation
Open loop operation

Latest Posts
Fuzzy Logic control system
Fuzzy Logic control…
In recent years, the number and variety…
Automatic Street light control system
Automatic Street…
Components Used in this Circuit: IC CA3140…
CCTV and Access Control Systems
CCTV and Access…
Security USA™ has consistently investigated…
Applications of Control Systems in Electrical Engineering
Applications…
Power system analysis, security control…
GERB Vibration control Systems
GERB Vibration…
GERB Vibration Control System, Inc…
Search
Featured posts
  • Open loop diagram
  • Open loop system diagram
  • Open loop operation
  • Open loop speed control
  • Open loop control systems
  • Open loop systems Examples
  • Open loop control Definition
  • Define open loop system
  • Feedback control Block diagram
Copyright © 2019 l www.oliver-control.com. All rights reserved.