如何在OpenModelica的Modeling视图中显示静态模型计算结果

我是Modelica新手，希望在OpenModelica中实现两个静态数值相加，并在Modeling视图中显示计算结果。

我创建了两个Modelica.Blocks.Sources.Constant源（source1=10、source2=20），并使用Modelica.Blocks.Math.Add模块实现相加（result=source1+source2），完整模型代码如下：

model demo
  Modelica.Blocks.Sources.Constant source1(k = 10)  annotation(
    Placement(visible = true, transformation(origin = {-70, 52}, extent = {{-10, 10}, {10, -10}}, rotation = 0)));
  Modelica.Blocks.Sources.Constant source2(k = 20)  annotation(
    Placement(visible = true, transformation(origin = {-70, -12}, extent = {{-10, 10}, {10, -10}}, rotation = 0)));
  Modelica.Blocks.Math.Add add annotation(
    Placement(visible = true, transformation(origin = {-12, 10}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
equation
  connect(source1.y, add.u1) annotation(
    Line(points = {{-58, 52}, {-24, 52}, {-24, 16}}, color = {0, 0, 127}));
  connect(source2.y, add.u2) annotation(
    Line(points = {{-58, -12}, {-24, -12}, {-24, 4}}, color = {0, 0, 127}));
  annotation(
    uses(Modelica(version = "4.0.0")),
  Diagram);
end demo;

目前我可以运行仿真，在Plotting视图中选择add模块的结果生成图表，但我希望留在Modeling视图中，通过某个显示元件直接展示结果值30。请问：

1. OpenModelica是否提供这类显示元件？
2. 是否必须切换到Plotting视图（即使是无需时间变量的静态模型）？
3. 如果没有现成元件，能否自定义（需访问仿真结果）？

• 有现成的显示元件：可直接使用Modelica.Blocks.Sinks.Display模块，它专门用于在Modeling视图的Diagram界面实时显示输入数值。
• 无需切换到Plotting视图：静态模型完全可以通过Display元件在Modeling视图直接查看结果，不需要跳转至Plotting视图生成图表。
• 自定义元件可行，但无需额外操作：虽然可以自定义显示元件（比如编写简单Modelica模型结合仿真结果更新显示逻辑），但现成的Display元件已满足需求，无需额外自定义。

修改后的示例模型 #

在原有模型中添加Display元件并连接到add模块的输出，代码如下：

model demo
  Modelica.Blocks.Sources.Constant source1(k = 10)  annotation(
    Placement(visible = true, transformation(origin = {-70, 52}, extent = {{-10, 10}, {10, -10}}, rotation = 0)));
  Modelica.Blocks.Sources.Constant source2(k = 20)  annotation(
    Placement(visible = true, transformation(origin = {-70, -12}, extent = {{-10, 10}, {10, -10}}, rotation = 0)));
  Modelica.Blocks.Math.Add add annotation(
    Placement(visible = true, transformation(origin = {-12, 10}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));
  Modelica.Blocks.Sinks.Display resultDisplay annotation(
    Placement(visible = true, transformation(origin = {50, 10}, extent = {{-20, -15}, {20, 15}}, rotation = 0)));
equation
  connect(source1.y, add.u1) annotation(
    Line(points = {{-58, 52}, {-24, 52}, {-24, 16}}, color = {0, 0, 127}));
  connect(source2.y, add.u2) annotation(
    Line(points = {{-58, -12}, {-24, -12}, {-24, 4}}, color = {0, 0, 127}));
  connect(add.y, resultDisplay.u) annotation(
    Line(points = {{2, 10}, {38, 10}}, color = {0, 0, 127}));
  annotation(
    uses(Modelica(version = "4.0.0")),
  Diagram);
end demo;

运行仿真后，你会在Modeling视图的Diagram界面看到resultDisplay元件直接显示计算结果30。

内容的提问来源于stack exchange，提问作者Stefan