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3.6 Circuit and DAEObject Manipulation 263
Return list of equations.
Set up AC DAE system.
The system is set up as a
matrix equation.
Return value is again a
list of equations.
In[4]:= GetEquations[dae]
Out[4]=
I$AC$D1t I$V0t ⩵⩵ 0, I$AC$D1t
V$2t C1 V$2 ′ t ⩵⩵ 0,
R1
V$1t ⩵⩵ V0, I$AC$D1t ⩵⩵ AREA$D1
1
1. $q V$1tV$2t
TEMP
$k
TEMP
1.11 1.
TNOM
$q
TEMP $k
IS$D1
TEMP 3.
TNOM GMIN V$1t V$2t
In[5]:= daeac = CircuitEquations[cir, AnalysisMode −> AC,
DefaultSelector −> "SpiceAC", ElementValues −> Symbolic]
Out[5]= DAEAC, 3 3
In[6]:= DisplayForm[daeac]
Out[6]//DisplayForm=
1
Rd$D1 Cd$D1 s 1
Rd$D1 Cd$D1 s 1
1
Rd$D1
Cd$D1 s
1
R1 1
Rd$D1
C1 s Cd$D1 s 0
. V$1
V$2
⩵⩵ 0
0
1 0 0
I$V0 V0
In[7]:= GetEquations[daeac]
Out[7]=
1
I$V0
Rd$D1 Cd$D1 s V$1 1
Cd$D1 s V$2 ⩵⩵ 0,
Rd$D1
1
1
Cd$D1 s V$1
Rd$D1 R1 1
C1 s Cd$D1 s V$2 ⩵⩵ 0,
Rd$D1
V$1 ⩵⩵ V0
3.6.6 GetMatrix
GetMatrix[dae]
returns the matrix equations stored in dae
Command structure of GetMatrix.
Given a DAEObject dae, GetMatrix returns the matrix A of the linear equation system A x ⩵ b
stored in the object.
Please note that GetMatrix is only valid for AC DAEObjects.
See also: GetEquations (Section 3.6.5), GetVariables (Section 3.6.7), GetRHS (Section 3.6.8),
GetParameters (Section 3.6.9), GetDAEOptions (Section 3.6.10), GetDesignPoint (Section 3.6.12).
Examples
Load Analog Insydes.
In[1]:=