Ramp

block Ramp "Generate ramp signal"
    parameter Real height = 1 "Height of ramps"
        annotation (Dialog(groupImage = "modelica://Modelica/Resources/Images/Blocks/Sources/Ramp.png"));
    parameter Modelica.SIunits.Time duration(min = 0, start = 2) "Duration of ramp (= 0.0 gives a Step)";

    extends Interfaces.SignalSource;
equation
    y = offset + (if time < startTime then 0 else if time < startTime + duration then (time - startTime) * height / duration else height);

    annotation (
        Icon(
            coordinateSystem(
                preserveAspectRatio = true,
                extent = {
                    {-100, -100}, 
                    {100, 100}}),
            graphics = {
                Line(
                    points = {
                        {-80, 68}, 
                        {-80, -80}},
                    color = {192, 192, 192}), 
                Polygon(
                    points = {
                        {-80, 90}, 
                        {-88, 68}, 
                        {-72, 68}, 
                        {-80, 90}},
                    lineColor = {192, 192, 192},
                    fillColor = {192, 192, 192},
                    fillPattern = FillPattern.Solid), 
                Line(
                    points = {
                        {-90, -70}, 
                        {82, -70}},
                    color = {192, 192, 192}), 
                Polygon(
                    points = {
                        {90, -70}, 
                        {68, -62}, 
                        {68, -78}, 
                        {90, -70}},
                    lineColor = {192, 192, 192},
                    fillColor = {192, 192, 192},
                    fillPattern = FillPattern.Solid), 
                Line(points = {
                    {-80, -70}, 
                    {-40, -70}, 
                    {31, 38}}), 
                Text(
                    extent = {
                        {-150, -150}, 
                        {150, -110}},
                    textString = "duration=%duration"), 
                Line(points = {
                    {31, 38}, 
                    {86, 38}})}),
        Diagram(
            coordinateSystem(
                preserveAspectRatio = true,
                extent = {
                    {-100, -100}, 
                    {100, 100}}),
            graphics = {
                Polygon(
                    points = {
                        {-80, 90}, 
                        {-86, 68}, 
                        {-74, 68}, 
                        {-80, 90}},
                    lineColor = {95, 95, 95},
                    fillColor = {95, 95, 95},
                    fillPattern = FillPattern.Solid), 
                Line(
                    points = {
                        {-80, 68}, 
                        {-80, -80}},
                    color = {95, 95, 95}), 
                Line(
                    points = {
                        {-80, -20}, 
                        {-20, -20}, 
                        {50, 50}},
                    color = {0, 0, 255},
                    thickness = 0.5), 
                Line(
                    points = {
                        {-90, -70}, 
                        {82, -70}},
                    color = {95, 95, 95}), 
                Polygon(
                    points = {
                        {90, -70}, 
                        {68, -64}, 
                        {68, -76}, 
                        {90, -70}},
                    lineColor = {95, 95, 95},
                    fillColor = {95, 95, 95},
                    fillPattern = FillPattern.Solid), 
                Polygon(
                    points = {
                        {-40, -20}, 
                        {-42, -30}, 
                        {-38, -30}, 
                        {-40, -20}},
                    lineColor = {95, 95, 95},
                    fillColor = {95, 95, 95},
                    fillPattern = FillPattern.Solid), 
                Line(
                    points = {
                        {-40, -20}, 
                        {-40, -70}},
                    color = {95, 95, 95}), 
                Polygon(
                    points = {
                        {-40, -70}, 
                        {-42, -60}, 
                        {-38, -60}, 
                        {-40, -70}, 
                        {-40, -70}},
                    lineColor = {95, 95, 95},
                    fillColor = {95, 95, 95},
                    fillPattern = FillPattern.Solid), 
                Text(
                    extent = {
                        {-72, -39}, 
                        {-34, -50}},
                    textString = "offset"), 
                Text(
                    extent = {
                        {-38, -72}, 
                        {6, -83}},
                    textString = "startTime"), 
                Text(
                    extent = {
                        {-78, 92}, 
                        {-37, 72}},
                    textString = "y"), 
                Text(
                    extent = {
                        {70, -80}, 
                        {94, -91}},
                    textString = "time"), 
                Line(
                    points = {
                        {-20, -20}, 
                        {-20, -70}},
                    color = {95, 95, 95}), 
                Line(
                    points = {
                        {-19, -20}, 
                        {50, -20}},
                    color = {95, 95, 95}), 
                Line(
                    points = {
                        {50, 50}, 
                        {101, 50}},
                    color = {0, 0, 255},
                    thickness = 0.5), 
                Line(
                    points = {
                        {50, 50}, 
                        {50, -20}},
                    color = {95, 95, 95}), 
                Polygon(
                    points = {
                        {50, -20}, 
                        {42, -18}, 
                        {42, -22}, 
                        {50, -20}},
                    lineColor = {95, 95, 95},
                    fillColor = {95, 95, 95},
                    fillPattern = FillPattern.Solid), 
                Polygon(
                    points = {
                        {-20, -20}, 
                        {-11, -18}, 
                        {-11, -22}, 
                        {-20, -20}},
                    lineColor = {95, 95, 95},
                    fillColor = {95, 95, 95},
                    fillPattern = FillPattern.Solid), 
                Polygon(
                    points = {
                        {50, 50}, 
                        {48, 40}, 
                        {52, 40}, 
                        {50, 50}},
                    lineColor = {95, 95, 95},
                    fillColor = {95, 95, 95},
                    fillPattern = FillPattern.Solid), 
                Polygon(
                    points = {
                        {50, -20}, 
                        {48, -10}, 
                        {52, -10}, 
                        {50, -20}, 
                        {50, -20}},
                    lineColor = {95, 95, 95},
                    fillColor = {95, 95, 95},
                    fillPattern = FillPattern.Solid), 
                Text(
                    extent = {
                        {53, 23}, 
                        {82, 10}},
                    textString = "height"), 
                Text(
                    extent = {
                        {-2, -21}, 
                        {37, -33}},
                    textString = "duration")}),
        Documentation(info = "<html>\n<p>\nThe Real output y is a ramp signal:\n</p>\n\n<p>\n<img src=\"modelica://Modelica/Resources/Images/Blocks/Sources/Ramp.png\"\n     alt=\"Ramp.png\">\n</p>\n\n<p>\nIf parameter duration is set to 0.0, the limiting case of a Step signal is achieved.\n</p>\n</html>"));
end Ramp;