Message Boards

20149 Views

4 Replies

7 Total Likes

View groups...

Follow this post

Share this post:

GROUPS:

Control Systems Engineering Mathematics SystemModeler

How to Reinitialize a Continuous Integrator Block

Posted 12 years ago

I am having trouble figuring out to reinitialize a continuous integrator block to its y_start value given a certain conditional state. I am modeling a Heat Pump for a week that only turns on during daylight hours. I have the On/Off states working fine, but I would like the integrator blocks to be able to be reset each morning to their intial values. You can see here one of the integrator outputs. Thanks. It's very easy to do this in Simulink - Integrator - as the integrator block has a state reset input built into it, but I can't figure out how do it in System Modeler. Any insights would be appreciated. Many Thanks.

POSTED BY: nathan curry

4 Replies

Sort By:

Posted 12 years ago

Here's an add-on to Peter's answer: It's easier to copy and paste the code if the annotations are included, that way the BooleanInput block is shown in the diagram view: model IntegratorWithReset extends Modelica.Blocks.Continuous.Integrator; Modelica.Blocks.Interfaces.BooleanInput reset annotation(Placement(visible=true, transformation(origin={-120,-60}, extent={{-20,-20},{20,20}}, rotation=0), iconTransformation(origin={-120,-80}, extent={{-20,-20},{20,20}}, rotation=-360))); equation when reset then reinit(y, y_start); end when; end IntegratorWithReset;

POSTED BY: Johan Rhodin

Posted 12 years ago

This model achieves that: model IntegratorWithReset extends Modelica.Blocks.Continuous.Integrator; Modelica.Blocks.Interfaces.BooleanInput reset; equation when reset then reinit (y,y_start); end when; end IntegratorWithReset; /Peter