Modelica.Thermal.FluidHeatFlow.Examples.Utilities

Information

Main Authors:

Anton Haumer
Technical Consulting & Electrical Engineering
A-3423 St.Andrae-Woerdern, Austria
email: a.haumer@haumer.at

Dr.Christian Kral
Österreichisches Forschungs- und Prüfzentrum Arsenal Ges.m.b.H.
arsenal research
Giefinggasse 2
A-1210 Vienna, Austria

Copyright © 1998-2009, Modelica Association, Anton Haumer and arsenal research.

The Modelica package is free software; it can be redistributed and/or modified under the terms of the Modelica license, see the license conditions and the accompanying disclaimer here.

Extends from Modelica.Icons.Library (Icon for library).

Package Content

Name	Description
DoubleRamp	Ramp going up and down

Modelica.Thermal.FluidHeatFlow.Examples.Utilities.DoubleRamp

Information

Extends from Modelica.Blocks.Interfaces.SO (Single Output continuous control block).

Parameters

Type	Name	Default	Description
Real	offset		Offset of ramps
Time	startTime		StartTime of 1st ramp [s]
Time	interval		Interval between end of 1st and beginning of 2nd ramp [s]
Ramp 1
Real	height_1		Height of ramp
Time	duration_1		Duration of ramp [s]
Ramp 2
Real	height_2		Height of ramp
Time	duration_2		Duration of ramp [s]

Connectors

Type	Name	Description
output RealOutput	y	Connector of Real output signal

Modelica definition

model DoubleRamp "Ramp going up and down"
  extends Modelica.Blocks.Interfaces.SO;
  parameter Real offset(start=1) "Offset of ramps";
  parameter Modelica.SIunits.Time startTime(start=0.2) "StartTime of 1st ramp";
  parameter Modelica.SIunits.Time interval(start=0.2) 
    "Interval between end of 1st and beginning of 2nd ramp";
  parameter Real height_1(start=-1) "Height of ramp";
  parameter Modelica.SIunits.Time duration_1(min=Modelica.Constants.small, start=0.2) 
    "Duration of ramp";
  parameter Real height_2(start=1) "Height of ramp";
  parameter Modelica.SIunits.Time duration_2(min=Modelica.Constants.small, start=0.2) 
    "Duration of ramp";

  Modelica.Blocks.Math.Add add;
  Modelica.Blocks.Sources.Ramp ramp1(
    final height=height_1,
    final duration=duration_1,
    final startTime=startTime,
    final offset=offset);
  Modelica.Blocks.Sources.Ramp ramp2(
    final height=height_2,
    final duration=duration_2,
    final startTime=startTime + duration_1 + interval,
    final offset=0);
equation 
  connect(ramp1.y, add.u1);
  connect(ramp2.y, add.u2);
  connect(add.y, y);
end DoubleRamp;