1
我想要建立一個繼電器，但我總是會得到一個對我來說沒有任何意義的錯誤。設計一個繼電器
錯誤提示地面物體缺失或部件未連接，
但我找不到任何缺失。
我試圖建立以不同的方式接力，但總是同樣的錯誤......
我測試繼電器類：
model test
Relay relay annotation (Placement(transformation(extent={{-20,4},{0,24}})));
ConstantVoltage constantVoltage annotation (Placement(transformation(
extent={{-10,-10},{10,10}},
rotation=-90,
origin={-74,10})));
ConstantVoltage constantVoltage1 annotation (Placement(transformation(
extent={{-10,-10},{10,10}},
rotation=-90,
origin={52,12})));
Modelica.Electrical.Analog.Basic.Ground ground
annotation (Placement(transformation(extent={{-42,-30},{-22,-10}})));
equation
connect(relay.n1, constantVoltage.n) annotation (Line(
points={{-20,9},{-46,9},{-46,0},{-74,0}},
color={0,0,255},
smooth=Smooth.None));
connect(constantVoltage.p, relay.p1) annotation (Line(
points={{-74,20},{-48,20},{-48,19},{-20,19}},
color={0,0,255},
smooth=Smooth.None));
connect(relay.n1, ground.p) annotation (Line(
points={{-20,9},{-26,9},{-26,-10},{-32,-10}},
color={0,0,255},
smooth=Smooth.None));
connect(relay.p2, constantVoltage1.p) annotation (Line(
points={{0,19},{26,19},{26,22},{52,22}},
color={0,0,255},
smooth=Smooth.None));
connect(constantVoltage1.n, relay.n2) annotation (Line(
points={{52,2},{26,2},{26,9},{0,9}},
color={0,0,255},
smooth=Smooth.None));
connect(ground.p, relay.n2) annotation (Line(
points={{-32,-10},{-16,-10},{-16,9},{0,9}},
color={0,0,255},
smooth=Smooth.None));
annotation (Diagram(coordinateSystem(preserveAspectRatio=false, extent={{-100,
-100},{100,100}}), graphics));
end test;
繼電器類： 很簡單，我只看v1，如果電壓是正的，繼電器應該讓電流通過。
model Relay
extends Modelica.Electrical.Analog.Interfaces.TwoPort;
Boolean off;
equation
off = v1 < 0;
v2 = if off then 0 else v2;
i2 = if off then 0 else i2;
annotation (Diagram(coordinateSystem(preserveAspectRatio=false, extent={{-100,
-100},{100,100}}), graphics));
end Relay;
錯誤日誌：
Check of MTS.test:
The model has the same number of unknowns and equations: 27
The problem is structurally singular.
It has 27 scalar unknowns and 27 scalar equations.
The Real part has 26 unknowns and 26 equations.
The Integer part has 0 unknowns and 0 equations.
The Boolean part has 1 unknowns and 1 equations.
The String part has 0 unknowns and 0 equations.
Attempting to further localize singularity.
Singularity of MTS.test is at the top level.
The model MTS.test is structurally singular.
The problem is structurally singular for the element type Real.
The number of scalar Real unknown elements are 26.
The number of scalar Real equation elements are 26.
The model includes the following hints:
An electrical current cannot be uniquely calculated.
The reason could be that
- a ground object is missing (Modelica.Electrical.Analog.Basic.Ground)
to define the zero potential of the electrical circuit, or
- a connector of an electrical component is not connected.
The problem has no elements of type Integer.
The problem is structurally regular for the element type Boolean.
The number of scalar Boolean elements are 1.
The problem has no elements of type String.
ERROR: 2 errors were found
WARNING: 2 warnings were issued
電阻沒有改變。同樣的錯誤。 – madmax