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ConnectSystemModelComponents
✖
ConnectSystemModelComponents

[Experimental]

✖
ConnectSystemModelComponents[{"c1"∈comp1,…},{"c1.a""c2.b",…}]

creates a system model by connecting connector "a" of component "c1" with connector "b" of component "c2" etc.

Details and Options

  • ConnectSystemModelComponents assembles components to create a new system model. These connections communicate values and set conservation laws in the system.
  • ConnectSystemModelComponents returns SystemModel[…].
  • ConnectSystemModelComponents["NewModel",…] gives the created model the name "NewModel".
  • ConnectSystemModelComponents["PackageA.NewModel",…] inserts "NewModel" into "PackageA".
  • The compi can be a SystemModel object, a full model name string or a shortened model name accepted by SystemModel.
  • In ConnectSystemModelComponents[…,spec], spec is an Association with the following keys:
  • "ParameterValues"{p1val1,…}parameter values
    "InitialValues"{v1val1,…}initial values
    "ExtendsModels"{partial1,…}partial models to build on
    "DiscreteVariables"{v1,v2,…}variables changing only at events
    "SimulationSettings"{opt1val1,…}model simulation options
  • With ConnectSystemModelComponents[…,"ExtendsModels"partial], the new model is combined with the existing partial SystemModel defined in Modelica. »
  • A model can extend multiple models using "ExtendsModels"{"partial1",…}.
  • Partial models to build on are usually defined in an Interfaces package. For example, SystemModels["Modelica.Electrical.Analog.Interfaces.*","model"|"block"] can be used to find partial models for the built-in electrical library.
  • "InitialValues" correspond to the start property in the Modelica model.
  • Allowed options in "SimulationsSettings"->{opt1val1,…} include
  • "Method"simulation method
    "StartTime"simulation start time
    "StopTime"simulation stop time
  • Available adaptive-step "Method" values include:
  • "DASSL"DASSL DAE solver
    "CVODES"CVODES ODE solver
  • Options for adaptive-step methods include:
  • "InterpolationPoints"number of interpolation points
    "Tolerance"tolerance for adaptive step size
  • Available fixed-step "Method" values include:
  • "Euler"explicit Euler's method of order 1
    "Heun"Heun's method of order 2
    "RungeKutta"explicit Runge–Kutta method of order 4
  • Options for fixed-step methods include:
  • "StepSize"fixed step size
  • The layout for the created model diagram can be controlled with the option GraphLayout.

Examples

open allclose all

Basic Examples  (2)Summary of the most common use cases

Create a simple electrical circuit:

In[2]:=2
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-v1l37h
In[3]:=3
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-v4bmxq
In[4]:=4
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-bsa02i
Out[4]=4

Show the current and voltage in the inductor:

In[5]:=5
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https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-jnpife
Out[5]=5

Use short naming to refer to the Abs and Sine components in Modelica.Blocks:

In[1]:=1
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https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-t6zvif
In[2]:=2
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https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-6jici8
In[3]:=3
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-6co1a3
Out[3]=3
In[4]:=4
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-7k1hm5
Out[4]=4

Scope  (5)Survey of the scope of standard use cases

Create a block example, sampling a sine wave at regular intervals:

In[1]:=1
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-mnb24w
In[2]:=2
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-sf148v
In[3]:=3
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https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-ocosqj
Out[3]=3

Simulate and plot the sampled signal:

In[4]:=4
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https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-6ehbra
Out[4]=4

Give a value to a parameter in a component:

In[1]:=1
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https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-vc054i
In[2]:=2
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https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-bafuw2

Set the amplitude of the sine to 3:

In[3]:=3
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https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-peyebl
Out[3]=3

Simulate and plot the output:

In[4]:=4
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-q3gkgv
Out[4]=4

Connect two masses with heat capacity with a thermal conductor:

In[1]:=1
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-rncjdw
In[2]:=2
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-ynjiv9
In[3]:=3
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-ugekp7
Out[3]=3

Set heat capacities, masses and initial temperatures:

In[4]:=4
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https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-mh02wp

Show that a temperature equilibrium is reached:

In[5]:=5
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https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-33zi9m
Out[5]=5

Create a mass connected to a spring:

In[1]:=1
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https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-fwxpxx
In[2]:=2
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-i9yu45

Move the initial position of the mass, stretching the spring:

In[3]:=3
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https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-xlbq8o
Out[3]=3

Show how the mass position oscillates:

In[4]:=4
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https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-ga4ajv
Out[4]=4

Build a damped 3D pendulum:

In[1]:=1
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https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-j3vspa
In[2]:=2
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https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-n84ab4

Set parameter values:

In[3]:=3
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-c0np1w
Out[3]=3

Simulate and animate the path of the pendulum:

In[4]:=4
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-vk2zh3
In[5]:=5
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-tn5w6z
In[6]:=6
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-c9y27t
In[7]:=7
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-ss6rp9
Out[7]=7

Generalizations & Extensions  (1)Generalized and extended use cases

Rule, DirectedEdge and UndirectedEdge can be used for connections:

In[1]:=1
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https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-c6r3mn

Use Rule to specify a connection:

In[2]:=2
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https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-qym8vg
In[3]:=3
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-gzoyrc
Out[3]=3

Use DirectedEdge and UndirectedEdge to specify connections:

In[4]:=4
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https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-fbddx8
In[5]:=5
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-ygq1g1
In[6]:=6
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-174zm4
Out[6]=6

Simulate and plot the signals:

In[7]:=7
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-eqdw7i
Out[7]=7

Options  (3)Common values & functionality for each option

GraphLayout  (3)

GraphLayout can be used to specify the layout of the model diagram:

In[1]:=1
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https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-yj1ilw
In[3]:=3
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-zamb4p
Out[3]=3

An edge-weighted "SpringElectricalEmbedding" is used by default:

In[1]:=1
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-7m8lyy
In[2]:=2
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-3i35q7
Out[2]=2

Turn off automatic layout:

In[1]:=1
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-jfaq9h
In[2]:=2
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-k8wj0f
Out[2]=2

Applications  (3)Sample problems that can be solved with this function

A DC Motor  (1)

Create a model of a DC motor by connecting electrical and mechanical components:

In[1]:=1
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-cunj34
In[2]:=2
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-1fq0zl
In[3]:=3
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-f8e086
Out[3]=3

Show the angular velocity of the DC motor:

In[4]:=4
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-x0jjd8
Out[4]=4

A Lowpass Filter  (1)

Create a digital lowpass filter:

In[1]:=1
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-ne9mv

Convert the filter into a transfer function:

In[3]:=3
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-frtx5k
In[4]:=4
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-fma2c6
Out[4]=4

Create a model of the filter:

In[5]:=5
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https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-lt4985

Create a signal generating source:

In[6]:=6
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https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-nq68wj

Connect the signal source to the filter:

In[7]:=7
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-tvuhnm
Out[7]=7

Simulate and plot the signal output and the filtered signal:

In[10]:=10
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-9kmmeu
Out[11]=11

An Inerter  (1)

Create an inerter, with forces at the terminals proportional to relative acceleration:

In[1]:=1
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-0m6g03

Compare how adding an inerter to a damping system influences vibrations:

In[2]:=2
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-rrvjc2
Out[4]=4
In[5]:=5
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-8gpecl
Out[5]=5

Set parameter values and simulate the system with a sine vibration force:

In[6]:=6
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-ib983p
In[12]:=12
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-ybnfpe
In[13]:=13
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-17qisq

Damping effects are of similar magnitude:

In[14]:=14
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-mqmolc
Out[14]=14

Forces acting on the damper component are significantly reduced with an inerter:

In[15]:=15
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-t848je
In[17]:=17
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-s3o2nn
Out[17]=17

Properties & Relations  (3)Properties of the function, and connections to other functions

Use CreateSystemModel to create models based on differential equations:

In[1]:=1
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https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-9au9aq
In[2]:=2
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-iujpgh
Out[2]=2

CreateSystemModel can be used similarly to ConnectSystemModelComponents:

In[1]:=1
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-uul0vx
In[2]:=2
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-8iqyor
Out[2]=2

Hierarchical models based on existing components enable quick creation of larger systems:

In[1]:=1
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-tqcupe

Build a 3D inverted pendulum model with a controller:

In[2]:=2
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-13e4o4
Out[2]=2

A complex multidomain system can be built using few components:

In[3]:=3
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-kubtms
Out[3]=3

Neat Examples  (1)Surprising or curious use cases

Show thermal conductance between vertices in a graph:

In[1]:=1
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-zx1h73
In[2]:=2
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-ksvj8e

Define components:

In[4]:=4
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-pjiq4h

Define connections:

In[7]:=7
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-vwvete

Create a model and set initial and parameter values:

In[8]:=8
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-kovksi
In[9]:=9
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-2jp40c

Simulate and animate the model, indicating temperature by color:

In[10]:=10
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-5gjnxb
In[11]:=11
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-fxgfmf
In[12]:=12
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-074yi
In[13]:=13
✖
https://wolfram.com/xid/0nxtkmmb3cn7wzcwj-1rm1jb
Out[13]=13
Wolfram Research (2018), ConnectSystemModelComponents, Wolfram Language function, https://reference.wolfram.com/language/ref/ConnectSystemModelComponents.html (updated 2020).
✖
Wolfram Research (2018), ConnectSystemModelComponents, Wolfram Language function, https://reference.wolfram.com/language/ref/ConnectSystemModelComponents.html (updated 2020).

Text

Wolfram Research (2018), ConnectSystemModelComponents, Wolfram Language function, https://reference.wolfram.com/language/ref/ConnectSystemModelComponents.html (updated 2020).

✖
Wolfram Research (2018), ConnectSystemModelComponents, Wolfram Language function, https://reference.wolfram.com/language/ref/ConnectSystemModelComponents.html (updated 2020).

CMS

Wolfram Language. 2018. "ConnectSystemModelComponents." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 2020. https://reference.wolfram.com/language/ref/ConnectSystemModelComponents.html.

✖
Wolfram Language. 2018. "ConnectSystemModelComponents." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 2020. https://reference.wolfram.com/language/ref/ConnectSystemModelComponents.html.

APA

Wolfram Language. (2018). ConnectSystemModelComponents. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/ConnectSystemModelComponents.html

✖
Wolfram Language. (2018). ConnectSystemModelComponents. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/ConnectSystemModelComponents.html

BibTeX

@misc{reference.wolfram_2025_connectsystemmodelcomponents, author="Wolfram Research", title="{ConnectSystemModelComponents}", year="2020", howpublished="\url{https://reference.wolfram.com/language/ref/ConnectSystemModelComponents.html}", note=[Accessed: 08-July-2025 ]}

✖
@misc{reference.wolfram_2025_connectsystemmodelcomponents, author="Wolfram Research", title="{ConnectSystemModelComponents}", year="2020", howpublished="\url{https://reference.wolfram.com/language/ref/ConnectSystemModelComponents.html}", note=[Accessed: 08-July-2025 ]}

BibLaTeX

@online{reference.wolfram_2025_connectsystemmodelcomponents, organization={Wolfram Research}, title={ConnectSystemModelComponents}, year={2020}, url={https://reference.wolfram.com/language/ref/ConnectSystemModelComponents.html}, note=[Accessed: 08-July-2025 ]}

✖
@online{reference.wolfram_2025_connectsystemmodelcomponents, organization={Wolfram Research}, title={ConnectSystemModelComponents}, year={2020}, url={https://reference.wolfram.com/language/ref/ConnectSystemModelComponents.html}, note=[Accessed: 08-July-2025 ]}