# \#juliasim

**URL:** https://discourse.julialang.org/tag/juliasim/1490.md

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## [Cart-pole trajectory optimization with ModelingToolkit, Multibody and JuliaSimCompiler model, how to improve performance? Constraints jacobian sparsity pattern issue?](https://discourse.julialang.org/t/cart-pole-trajectory-optimization-with-modelingtoolkit-multibody-and-juliasimcompiler-model-how-to-improve-performance-constraints-jacobian-sparsity-pattern-issue/127856)

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**Author:** [@Odie](https://discourse.julialang.org/u/Odie)\
**Replies:** 7\
**Last updated:** [April 14, 2025, 2:15pm UTC](https://discourse.julialang.org/t/cart-pole-trajectory-optimization-with-modelingtoolkit-multibody-and-juliasimcompiler-model-how-to-improve-performance-constraints-jacobian-sparsity-pattern-issue/127856 "2025-04-14T14:15:30Z")

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Hi! I’m trying to do a trajectory optimization problem with a direct collocation method on my own model. To begin with, I decided to reproduce a documented problem : the cart-pole. I used ModelingToolkit and Multibody …

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## [Commercial offers of Julia Computing](https://discourse.julialang.org/t/commercial-offers-of-julia-computing/127914)

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**Author:** [@ufechner7](https://discourse.julialang.org/u/ufechner7)\
**Replies:** 3\
**Last updated:** [April 10, 2025, 5:12pm UTC](https://discourse.julialang.org/t/commercial-offers-of-julia-computing/127914 "2025-04-10T17:12:08Z")

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I asked Julia Computing for an offer for a license for using the package JuliaSimControl.jl locally (for a small startup company). I came to the conclusion that such a license is not offered. This is a pity. For small c…

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## [Known disturbances in JuliaSimControl MPC](https://discourse.julialang.org/t/known-disturbances-in-juliasimcontrol-mpc/119810)

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**Author:** [@bertrand](https://discourse.julialang.org/u/bertrand)\
**Replies:** 3\
**Last updated:** [September 25, 2024, 8:00am UTC](https://discourse.julialang.org/t/known-disturbances-in-juliasimcontrol-mpc/119810 "2024-09-25T08:00:49Z")

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Hi, I’m writing an MPC with known external disturbances using JuliaSimControl. I’m currently passing the known disturbances w as part of the parameter vector into the dynamics function, i.e. function dynamics(x, u, p,…

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## [JuliaSimCompiler + symbolic arrays?](https://discourse.julialang.org/t/juliasimcompiler-symbolic-arrays/116161)

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**Author:** [@ctessum](https://discourse.julialang.org/u/ctessum)\
**Replies:** 2\
**Last updated:** [June 27, 2024, 12:53am UTC](https://discourse.julialang.org/t/juliasimcompiler-symbolic-arrays/116161 "2024-06-27T00:53:27Z")

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Hello! Is JuliaSimCompiler currently meant to work with arrays? I would like to create a symbolic model that does the same thing a bunch of different times (eventually with different data inputs). I am aware of Ensemble…

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## [JuliaSimModelOptimiser, UDEs, network and model connection](https://discourse.julialang.org/t/juliasimmodeloptimiser-udes-network-and-model-connection/107569)

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**Author:** [@rpex](https://discourse.julialang.org/u/rpex)\
**Replies:** 1\
**Last updated:** [December 13, 2023, 3:24pm UTC](https://discourse.julialang.org/t/juliasimmodeloptimiser-udes-network-and-model-connection/107569 "2023-12-13T15:24:32Z")

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When I use Neural Automated Model Discovery for Autocompleting Models with Prior Structural Information from JuliaSimModelOptimiser. How is the neural network connected with the incomplete model? Is it: \\frac{d states}…

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## [JuliaSimModelOptimiser get calibration results](https://discourse.julialang.org/t/juliasimmodeloptimiser-get-calibration-results/107503)

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**Author:** [@rpex](https://discourse.julialang.org/u/rpex)\
**Replies:** 1\
**Last updated:** [December 12, 2023, 3:33pm UTC](https://discourse.julialang.org/t/juliasimmodeloptimiser-get-calibration-results/107503 "2023-12-12T15:33:10Z")

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Can JuliaSimModelOptimiser.jl topics be asked here? I define a search space and create an JuliaSimModelOptimizer.InverseProblem. Then I calibrate my search space to data and get a JuliaSimModelOptimizer.CalibrateResult. …