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# Questions tagged [system-modeling]

Questions regarding the system modeling functionality of the Wolfram Language.

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141 views

### Extension of: Numerically solving a system of SDE's with Levy noise?

A great answer by Alex is to be found here for my original question: Numerically solving a system of SDE's with Levy noise? Now Let us perturb this system with time delays so the system is: \begin{...
413 views

### Numerically solving a system of SDE's with Levy noise?

Consider this system from the following paper titled: The long-time behaviour of a stochastic SIR epidemic model with distributed delay and multidimensional L´evy jumps https://arxiv.org/pdf/2003....
201 views

### The nonlinear state-space model of a spherical pendulum cannot be linearized and cannot be controlled?

I am attempting to model and control a spherical pendulum. I have derived the equations as follows: ...
63 views

### LayeredGraphPlot: How to draw inputs and outputs edges without first and final vertex?

I would like to obtain entrance edge and output edges as in the following figure My code is the following: ...
152 views

### How to install additional libraries in Wolfram language's SystemModel?

I have been using a command like the following to get models into Wolfram language: ...
132 views

With a given linear drive system ...
1 vote
92 views

### Having trouble moving program from python to Mathematica

I'm trying to move a Covid-19 model programmed in python to Mathematica and I can't figure out how to translate this segment of the code to Mathematica. ...
1 vote
38 views

### Parallel generation of SystemModel

I notices that it takes quite a long time to generate a lot of models. Therefore, it occures to me that maybe parallelization would help. However, the following example keeps evaluating and never ...
238 views

### There seem to be severe issues with Mathematica 12.1 running System Modeler models and with WSM 12.1 itself on Windows 10

I am using Wolfram Mathematica 12.1 and the Wolfram System Modeler 12.1 on a Windows 10 (64 Bit) notebook. Pretty much exactly since yesterday (2020-04-10), I am experiencing severe and previously ...
191 views

### 3D Plotting and optimising on the surface area of a spherical gyroid [closed]

*this is an equation of a shperical gyroid emphasized texti want to plot it in mathematica and obtain the shapes like those on the picture below. sinxcosy + sinycosz + sinzcosx = 0 i also want to know ...
277 views

### Mathematica NDSolve for DAE and System Modeling

I'm a student for HVAC engineering and I've been using Mathematica for my study (mostly differential-algebraic equation system or Finite-Element-Analysis) and my hobby project for years. I really ...
178 views

### Recommended model for hysteresis

I have a fabric-based strain sensor and would like to find out what other recommended models can be used in the hysteresis modelling. I have tried using the cubic function for loading and unloading ...
283 views

### How to enter vector inputs in SystemModelSimulate?

A support case with the identification [CASE:4272760] was created. I am having some difficulties to provide vector inputs for a Modelica model using Mathematica. ...
164 views

### Why is a Boolean output not given as True/False by SystemModelSimulate?

Bug introduced in 11.3 and fixed in 12.1 I am a bit surprised that I am not getting a boolean output for the following simple Modelica model: ...
175 views

### Why does SystemModelSimulate not simulate a model when parameters and inputs are changed within a single association?

A support case with the identification [CASE:4265480] was created. I am a bit confused about the following behavior in Mathematica 12.0 (Windows 64) simulating a very simple Modelica model using <...
82 views

### Can custom "operator records" be defined and used in Wolfram System Modeler (and the WL)?

From an answer to a Modelica-related question on SO I learned about the possibility to overload operators in Modelica by using spezialized class operator record. Looking into the Modelica specs for ...
84 views

### Why will functions from the SystemModelConfiguration` package not evaluate?

Documentation page now improved (checked in v13.0) According to the tutorial Compiler for System Modeling I should be able to verify the installation of a C++ ...
1k views

### In what way can M11.3's system modelling features be used by those who don't have SystemModeler?

Mathematica 11.3 includes some functionality from SystemModeler, but not the full SystemModeler environment. I assume that most people here are familiar with Mathematica, but not SystemModeler, or ...