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Webinar - MotionView/MotionSolve 2025.1 for Vehicle Dynamics
https://www.youtube.com/watch?v=Fp6ftykS3jw This webinar is for Automotive, Off-Highway, Powersports, Heavy Truck, Land Defense, Last Mile Delivery industries, mainly: - CAE engineers responsible for chassis durability & fatigue analysis - Design & Release engineers responsible for chassis performance attributes -…
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Using SYSARY/SYSFNC and MotionSolve functions in CNFSUB/CFFSUB
Hello everyone, I’m working a contact force problem in MotionSolve where the normal force is implemented via a CNFSUB. I’m trying to confirm whether SYSARY and SYSFNC functions can be used inside CNFSUB (or CFFSUB). From my tests, it seems that these functions always return zero (or no valid value) when called inside…
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GUI Design in Compose – Simple Example
Altair Compose supports the creation of Graphical User Interfaces (GUIs) to simplify and streamline workflows that will be executed repeatedly or by someone unfamiliar with tools like Compose or other IDEs. Most tasks in Compose can be executed running scripts and updating relevant file paths and variable values, but they…
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Altair Compose - Hold data from readcae for loop
Hi everybody, It's been a while I'm struggling with a for loop involving readcae command on compose. I've got a .op2 result file and I need to get element stresses for a set of elements and for different loadcases. Specifically, I have 4 elements and 2 loadcase. Following the scripts I'm using (X is the op2 filename):…
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Community Champion of the Month - July, 2025
The Community Team would like to introduce the July Champion of the Month, Dr. Luca Cavagna @Luca Cavagna who has vast experience as an aerospace engineer in the field of aeroelasticity , flight/ground loads and simulation. Luca Cavagna graduated in 1998 from Politecnico di Milano in Aerospace Engineering with a thesis on…
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Faster-than-Real-Time EV Drive Cycle Simulations with PSIM-trained Fit Models | Part1
IntroductionWe will simulate the WLTP Class 3b drive cycle of 1,800sec in just 25sec of simulation time, which is x72 times faster than real time. Let's see how! Working with drive cycle simulation can be challenging—especially when attempting to include all the details of an electric powertrain. The main issue arises from…
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PI Controller Optimization of Buck Converter
In this article we will explain how to set up the optimization of Kp (Proportional Gain) and Ti (Time constant) for average current control of Buck Converter with PSIM and HyperStudy. PSIM Set-up The PSIM schematic is composed of three main parts as shown in Fig1: Buck converter with Ideal switching devices: PI Controller…
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How to Register Custom OML and Python Functions in HyperStudy
Custom functions written in Python or Compose OML can enhance your HyperStudy workflows by enabling more flexible response definitions. While HyperStudy is a code-free platform designed to handle simulation automation, that doesn't mean you lack the flexibility to add your own custom functions! This guide shows you how to…
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Issue with Filter in Altair Compose
Dear Team, I am working in Altair Compose, and I am experiencing an issue with the filtering behavior. Specifically, the filter command appears to be working (i.e., it is being recognized as saefilter 180 and applied to the curve), but the results in certain parts of my compose chart are not as expected. Some layers are…
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OMLPY - Seamless OML Access from Python in Altair Products
What is OMLPY? An extension that enables you to call OML (Open Matrix Language) built-in and user-defined functions directly from Python within Altair products such as Compose, HyperMesh, HyperGraph, HyperView, and Inspire. Extension is available starting in Compose 2025.1. Key Features: Access all OML built-in functions…
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Mixing Optimization on Maximal Stiffness (freq) "WITH" Minimal Weight
I am setting up for a "FREE SIZING" optimization, of a CQUAD4 only structure… yup… Shell Thickness design variable(s) I set up: DRESP1 1 TOT_MASS MASS DRESP1 2 FRSTMODE FREQ 1 DRESP2 3 COMBINED 222 DRESP1 1 2 DEQATN 222 … blah blah blah (this is not where it fails) DESOBJ can occur in ONLY ONE PLACE in the Case Control…
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romAIを用いたパワーコンバーターのAIサロゲートモデル
このセッションでは、Altair romAI を使用して PSIM パワーコンバーターのサロゲート AI モデルを構築する方法をご紹介します。これらの AI 低次元化モデル（ROM）は、システムのダイナミクスを高精度に捉えつつ、システムシミュレーションをはるかに高速に実行することを可能にします。バッテリー充電アプリケーションにおけるパワーコンバーターのシミュレーションは、しばしば計算コストが高く、バッテリー充電システムの解析に必要な長期間のシミュレーションは、非常に時間のかかるプロセスです。Altair romAI は、リアルタイムよりも高速な結果を生成できるため、設計の評価と改善に集中することができます。…
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Compose IDE for HyperWorks Python
Starting with HyperWorks 2025.1, users can create, edit, and debug HW python scripts using the Altair Compose IDE. How to ? From within the HyperWorks > Developer ribbon, you have a debugger Icon that launches Compose in 2 modes: with no file loaded, where one can start to write scripts and execute them from scratch. From…
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Using Compose to write scripts for Simlab
Hello, I am trying to run a script for Simlab using the Python IDE in Compose. I run into issues with the very first line of code where I call: from hwx import simlab I get an error in the Python window of Compose: ImportError: cannot import name 'simlab' from 'hwx' (C:\Program…
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Error in fitting Jiles Atherton model in compose
Description: I’m using the Jiles_Atherton_Model from Flux Identificaton Material in Altair Compose to perform a Jiles–Atherton BH curve fit on data exported from PSpice. I converted my PSpice output to a CSV with only two columns (H in A/m and B in T), removing the Time column since I only needed to plot B vs H. However,…
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AI Surrogate Models of Power Converters with Altair romAI | Webinar Recording
This session shows how to build surrogate AI models of PSIM power converters using Altair romAI. These AI reduced-order models (ROMs) can be used to run system simulations much faster, while still capturing system dynamics with high accuracy. Power converters in battery charging applications are often computationally…
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Motionview flexbodies stress results
Hello, I’m using the Vehicle Tools in MotionView and have successfully imported a FlexBody into my model. After running the simulation, I was able to visualize the stress and strain contours in HyperView. Now, I would like to extract the stress values (e.g., von Mises stress) for each node of the FlexBody into a readable…
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Altair compose
Good morning, I have an h3d file that I want to visualize in ParaView, but I can't figure out how to use Altair Compose to convert the file to h5 format and load it into ParaView. Additionally, I’m not sure which reader to use within ParaView
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Altair Compose 2025 - 新機能紹介ウェビナー動画・資料
科学技術計算ツール Altair Compose 2025では、Dicom医療用画像通信ライブラリ・最適化ライブラリの拡充、エディタの機能強化やAI Studio用Extensionなど各種機能追加がございます。 資料のダウンロードはこちら。 https://us.v-cdn.net/6038102/uploads/ZMMI5VNWR59X/compose-2025-e6-96-b0-e6-a9-9f-e8-83-bd-e7-b4-b9-e4-bb-8b.pdf 主な新機能 ・機能改善 Dicom医療用画像通信ライブラリ 最適化関数の追加 経路（組み合わせ）・カーブフィッティング エディタの機能強化 AI Studio用Extension…
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Fluid Modeling with OptiStruct
Introduction In order to model fluid-structure interaction with OS one should consider the type of fluid he wants to study. One way is to look at the bulk modulus of the material that can be defined as: where ρ is the density and c is the speed of sound. Since compressibility is the inverse of the bulk modulus, fluids with…
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How to export plots to image?
I have this plot, how can I export this to an image? Thanks
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Automating PSIM with HyperStudy vs Scripting
The primary goal of this article is to highlight the advantages of Altair HyperStudy over making scripts to process data produced by PSIM. This article does not delve into the implementation details of a script or a HyperStudy file. If you are not familiar with these yet, please refer below for the HyperStudy and here for…
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Yeoh_fitting
The Yeoh model currently only supports material parameter input. Thus, it is necessary to calculate the Yeoh material parameters outside of Radioss. For this example, a solidThinking Compose script is provided to calculate the Yeoh parameters in Radioss.…
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Creating Datasets from Results Files for Altair romAI
Altair romAI is an AI-powered technology that creates reduced order models (ROMs) to accelerate complex simulations like DEM, CFD, etc. ROMs created with romAI capture the dynamic response of a system accurately and yield almost instant results. One of the most time-consuming steps when working with romAI is preparing your…
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E-book for System Dynamics and Controls Using Altair Compose
E-book for System Dynamics and Controls Using Altair Compose This e-book is aimed at readers who are approaching “System Dynamics and Control Theory” for the first time or have a basic knowledge of this subject. We will provide the reader all the required theoretical knowledge before moving to the practical examples shown.…
