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eBook: Practical Aspects of Structural Optimization
This study guide aims to provide a basic introduction in the different optimization methods. Designed for users who are interested to learn more about the “inspiring” world of optimization.

Five Common Mistakes made Running Topology Optimization
Topology optimization is an approach that optimizes the material distribution within a given design space, for a given set of loads and boundary conditions, to meet a set of performance targets. Using topology optimization at a concept level can help you achieve the best performing design while saving time by replacing costly design iterations.

SimSolid Drives Down Analysis Time at Don-Bur
Truck trailer manufacturer, Don-Bur, discuss the challenges its engineering team was having with simulation in SolidWorks, and how a move to SimSolid has cut its simulation time from hours to a just few minutes.

Magneto Vibro Acoustic Design of PWM Fed Induction Machines
Induction Motors (IM) are widely used in various industries. To ensure their speed control, IM will be supplied with pulse width modulation (PWM). This kind of supply, can impact efficiency of the motor and degrade its vibro-acoustic behavior, generating noise nuisance. To tackle these technical challenges and ensure best-in class acoustic comfort for users, it is necessary to design a quiet e-motors at the early stage of design.
The first aim of this paper is to show a new method to reduce noise and vibration due to PWM supply of induction machine. The proposed approach allows the passive reduction of air-gap flux density harmonics in an induction machine. The second interest, is to show a new method to analyze the vibro-acoustic behavior of a PWM-fed IM. The method is fully finite element (FE) computation. Finally, the third interest of this article, is to compare noise and vibration results between the proposed FE method, magneto-vibro-acoustic coupling and measurements. Good agreement between measurements and computation will be shown.


Optimizing CAE Data Preparation Processes Using CADdoctor
As the use of 3D data throughout the produce lifecycle broadens, it is ever more essential to prepare high-quality 3D CAD geometry models to streamline the entire simulation process. CADdoctor is a tool to streamline CAD geometry preparation to make the data suitable for the HyperMesh simulation process. This helps to achieve reducing your simulation lead time and improving the accuracy of the simulation result. This presentation will be an introduction to one of the leading software on the Altair Partner Alliance and how this software has been benefitting users throughout the globe.

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Unit Delay, Pulse Counter, and Discrete Integrator
Use of the Unit Delay, modeling a pulse counter, and modeling a discrete backwards rectangular integrator.


Discrete Reset Integrator, Merge, & CrossDetect Blocks
Understanding the Merge and CrossDetect blocks, adding an Embed model to the Embed MenuBar, modeling a discrete reset integrator.


Fixed Point - Fundamentals Part 1
Description and use of fixed point blocksets, block properties, blockset configuration tool and displaying fixed point overflow messages and watermarks.


Fixed Point - Fundamentals Part 2
Application of fixed point autoscale feature and attributes of automatically generated fixed point C-code


Fixed Point - Filters
Use of the transfer function block and filter design option to design, discretize and implement a second order low pass filter. Adjusting the discrete stepsize and fixed point format for acceptable performance are covered.


Drivers...Start Your Simulation? University of Texas – Arlington uses Altair SimLab™ and Altair Optistruct™ to design an adjustable pedal box for their Formula SAE racecar
Formula SAE is a collegiate design series run by Society of Automotive Engineers (SAE), which challenges students to design, build and compete with an open wheel style car across various events. The competition pitches various teams across different static events focusing on the teams engineering design decisions, cost planning, marketing strategies and vehicle inspections. The teams also have to compete under various dynamic events like acceleration, skid-pad, autocross and the endurance run where even the fuel economy is checked.

OptiStruct – Nonlinear Axisymmetric Analysis
Nonlinear axisymmetric analysis with OptiStruct.


Product: OptiStruct
Product Version: OptiStruct 2019.0 or above

Topic Objective
Nonlinear axisymmetric analysis with OptiStruct.

Topic Detail
Analyzing a symmetrical portion of a structure means faster processing than if you modeled the whole structure.Axisymmetric CTAXI with 3 and 6 node tria-elements, where always available for linear analysis. From 2019.0 we support axisymmetric quad-elements with 4 or 8 nodes.

Axisymmetric Elements
Axisymmetric are available for tria & quad elements for both
  • 1st order
  • 2nd order

    For linear analysis, & nonlinear static analysis
    • Small displacement
    • Large displacement


    Contact support for Axisymmetric elements (Supported from V 2019.1)
    • N2S and S2S CONTACT and TIE are supported for axisymmetric modeling.
    • Currently, contact for axisymmetry is supported only for small sliding.
    • The Contact Smoothing option is also not supported.


    Axisymmetric are not supported yet for:
    • Inertia relief analysis in LGDISP nonlinear analysis
    • Hyper-elastic materials
    • Optimization with non-linear








  • Controlling LEDs - Basics
    Blink the red LED on a Texas Instruments F28069M LaunchPad board at 0.5Hz. The model is expanded to blink the red and blue LEDs alternately at 0.5 Hz and then at 10Hz.


    Controlling LEDs - Frequency Controlled
    Example of host-to-target communication to blink the red LED on the target Texas Instrument F28069M LaunchPad Development Kit using an Embed slider block.


    Controlling LEDs - Frequency Controlled With "On Time" Measurement
    Host-to/from-target communication to blink the red LED on the Target Texas Instrument F28069M LaunchPad Development Kit


    Compound Blocks - Basics
    Create compound blocks to add levels to your model; navigate through your model; add/remove compound block connector pins; use compound block dialog constants and dialog windows; access and use built in variables


    Compound Blocks - Advanced
    Discussion of two compound block features; Enabled Execution and Local Time Step. Additionally, the Local Time Step feature is applied to implement the block diagram equivalent of a "For" loop to iteratively solve a nonlinear implicit equation.


    Oscilloscope Display Using Monitor Buffer
    High speed data collection using the EMBED Monitor Buffer Read and Write blocks, using the plot block to display Monitor Buffer data, displaying the % CPU usage using the Target Interface Block, and controlling the Target update time.


    Plot & Buffer blocks
    Creating vectors using the Embed “buffer” block, and configuring and using the “plot” block to display “buffer” data.


    Digital Power Buck Converter Control
    Voltage Mode Control


    Texas Instruments CCS Software Installation
    Step by Step instructions to install the Texas Instruments Code Composer Studio and Uniflash software on your computer.


    Furuta Inverted Pendulum Control
    Apply the Model -Based Development process to the design, test, and HIL testing of a swing up and balance controller for the Furuta inverted rotary pendulum.


    Add a Model to the Embed Menubar
    A binary hysteresis model is developed and simulated. The model is added to the Embed Menubar under a new menu named MyModels.


    Encoders
    Configure and read a US Digital S4T 4 wire quadrature incremental encoder connected to a Texas Instrument F28069M LaunchPad board.


    Altair Inspire – Mesh Control
    How to use the mesh control option in Altair Inspire.


    Product: Altair Inspire

    Product Version: Altair Inspire 2018.1 or above

    Topic Objective
    Mesh control option in Altair Inspire.

    Topic Details
    Mesh controls have been added to assign an element size to parts or faces. This option would help to assign a smaller element size near critical location.

    The element size dictates the quality of your analysis or optimization results. In general, the smaller the element size, the more accurate the result.



    Simulation-Driven Design of Sheet-Metal Components
    A good Design is not complete unless it meets desired performance and qualifies for efficient manufacturing. Design of sheet-metal components demand the following, From a Design perspective - if sheet-metal can be used for intended design, their sizing & shape, choice of material, weight and cost.
    From Manufacturability perspective - manufacturing feasibility of the designed shape, allowable thinning and wrinkling limits, addressing process constrains and importantly forming feasibility.


    Leveraging Simulation to drive the design as it unfolds at the concept generation stage, helps design engineers to accrue downstream benefits upfront.

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    Improving Performance Using FEKO and HyperStudy at Northrop Grumman
    Scott Burnside, Senior Antenna & RF Engineer at Northrop Grumman, explains how Altair Feko and HyperStudy can be combined to design and optimize antennas for land vehicles, helicopters, and aircrafts.

    OptiStruct – Mode Tracking and Rotor Energy from Complex Eigen Value Analysis
    OptiStruct – Mode Tracking and Rotor Energy from Complex Eigen Value Analysis


    Product: OptiStruct

    Product Version: OptiStruct 2019.0 or above

    Topic Objective
    Mode tracking and rotor energy from complex eigen value analysis with OptiStruct.

    Topic Detail
    Mode Tracking is now available for rotor dynamics with complex eigenvalue analysis
    • It is mapping the mode-shapes of a system from one state to another.
    • Tracking is carried out using various methods shown in the below bulk card.
    • Assumption is that the two states are close for eigenvectors to retain orthogonality across states.
    • Mode-tracking in rotor dynamics tracks modes across rotor speeds and yields a much better Campbell diagram, as shown below.



    OptiStruct – Key Performance Indicator Output
    OptiStruct – Key Performance Indicator Output



    Product Version: OptiStruct 2018.0 or above

    Topic Objective
    Key performance indicator output in OptiStruct.

    Topic Detail
    KPI (Key Performance Indicator)
    • OUTPUT,KPI or DISP(KPI) .kpi ascii file is output
    • Currently supported for linear and nonlinear static analysis
    • Max value for displacement/stress/strain/plastic strain based on groups by property
    • Stresses and strains are supported for shells and solids

    KPI output filtered for user specified property (Available with V 2019.1)
    • KPI output is limited to the grids/elements within the output sets. Set of property could be used to request the KPI output only for a list of properties.

    Analysis Page: Control card: OUTPUT: KPI



    OptiStruct – Section Force Output from Pretension Bolt
    OptiStruct – Section Force Output from Pretension Bolt


    Product Version: OptiStruct 2019.0 or above
    Topic Objective
    Section force output from pretension bolt in OptiStruct.
    Topic Detail
    Section force output from pretension bolt
    • No need to define SECTION manually
    • Solids
    • Automatic output of SECTION results with solid pretension bolt
    • Out file as well as .secres file

    Example:



    Digital Power - Simulation Blockset overview
    Brief overview of the simulation blockset of the Digital Power Designer. In this video we look into and analyze a selection of bocks used for simulation (Compensators, PWM simulation, Voltage Mode Control simulation, Buck Converter).


    Digital Power - Coefficient Conversion
    Select/tune the coefficients of a PID compensator. Users can calculate the digital coefficients from the analog component values or can tune the coefficients on the fly.


    Digital Power - Model Based Frequency Response Analysis
    Details of the new block of the Digital Power Designer which lets user do a frequency response analysis.


    Buck Converters - Simulation
    Simulation of the control system in order to analyze the response of the buck converter in voltage mode control. The microcontroller peripherals which are needed are simulated using the peripheral simulation blocks of the Digital Power Designer.


    Buck Converters - Compensator Coefficient Tuning
    The buck converter is simulated with the coeffiecients of the compensator being the inputs. This gives us the opportunity to better tune the coefficients based on the response of the converter.


    Buck Converters - Open Loop
    We take the first step to control the actual converter. We run a hardware in the loop diagram in open loop.


    Buck Converters - Closed Loop Model Design and Compilation
    We look into the design of the model for closed loop control of the buck converter and look into the compilation of the model with just 3 clicks.


    Buck Converters - Closed Loop Debugging (HIL) and Flashing
    Last part is running the closed loop control algorithm in hardware in the loop for validation. After validation we can revert to the design diagram and in just one step create a binary file that can be flashed to the controller.


    PMSM - Overview
    Introduction of Prof. Duco Pulle and overview of the Permanent Magnet Synchronous Motor (PMSM) lab examples


    PMSM - Open Loop Voltage Control Simulation
    Short introduction to the theory of open loop voltage control of a PMSM


    PMSM - Open Loop Voltage Control HIL
    Hardware Used: TI LaunchXL-F28069M, BoostXL-DRV8301, Teknic M2310


    PMSM - Open Loop Current Control HIL
    Hardware Used: TI LaunchXL-F28069M, BoostXL-DRV8301, Teknic M2310


    PMSM - Field Oriented Control Simulation
    Short introduction to the theory of closed loop field oriented control of a PMSM


    PMSM - Field Oriented Control HIL
    Hardware Used: TI LaunchXL-F28069M, BoostXL-DRV8301, Teknic M2310


    PMSM - Sensorless Field Oriented Control HIL
    Employing TI's FAST (Flux, Angle, Speed, and Torque) observer


    PMSM - Motor Identification for InstaSPIN FOC
    InstaSPIN: Motor Control solution from Texas Instruments.


    Altair Embed Arduino - Dimming an LED in less than one minute
    Introduction to pulse width modulation (PWM) and its use for dimming an LED


    Altair Embed Arduino - Dimming an LED
    Introduction to PWM and its use for dimming an LED


    Altair Embed Arduino - Push Button Control
    Introduction to State Charts


    Altair Embed Arduino - Control the color of an LED using Potentiometers
    Hardware used: 3x 10kΩ Potentiometers 4x 220Ω Resistors 1x RGB LED 1x Arduino 1x Breadboard


    Altair Embed Arduino - Algorithm Validation using the Serial UART
    Validating the algorithm for controlling the color of an LED


    Altair Embed DC Motor Current Control
    Prof. Duco Pulle introduces current control of a DC Motor using a Linear Actuator


    Altair Embed Drone Control - Theory
    Prof. Duco Pulle takes us through the theory of controlling a drone DC motor


    Altair Embed Drone Control - HIL Setup
    Prof. Duco Pulle explains and sets up the diagram for Hardware in the Loop control of a drone DC motor


    Drone Control - HIL Run
    Prof. Duco Pulle controls a drone DC motor in an HIL diagram


    Salient PM Motor - Theory
    Prof. Duco Pulle takes us through the theory of controlling a salient PM motor


    Salient PM Motor - Code Generation & HIL
    Prof. Duco Pulle shows code generation and Hardware in the Loop control of a salient PM motor


    Lead-Time Reduction at Renault with Altair SimSolid
    Renault presented on their use of Altair SimSolid at the HyperWorks 2019 Roadshow in France. They showed a reduction in lead time from weeks to hours with results accuracy within 5% of their standard processes.

    Midsurfacing and Meshing in HyperWorks X
    A beam example of how the new Altair HyperWorks X workflows allow to quickly extract midsurfaces, generate a mesh and apply morphing.

    Hyperworks X: Morphing Examples on a Turbine Blade
    This brief demo shows the easy accessibility to morphing in HyperWorks X. Different examples are shown to explain, how to take advantage of Altair's morphing technology.

    Hyperworks X: Design Space Management
    Altair HyperWorks X introduces a very intuitive and powerful workflow to quickly generate design and non-design space for optimization runs. It also provides a library for automotive related non-design spaces, such as engine, seats, engine, sunroofs, and wheel arches. The results can be quickly altered with manipulators.

    Geometry Generation and Morphing in HyperWorks X
    Based on the example of a floor panel, this video shows how easy it is to generate new geometries and meshes in HyperWorks X. Some adjustments to the mesh are done with the morphing functionality. These mesh geometry changes are saved as shape, e.g. to use it for a subsequent optimization.

    Altair Activate DC-Motor
    A DC motor comprised of mechanical and electrical subsystems


    Altair Activate Double DC-Motor with belt
    Two DC motors used to drive a belt


    Altair Activate Two DC motors applied to clutch
    Two DC motors applied to a clutch plate


    Altair Activate Notch filter
    Notch filter used to remove unwanted frequencies (noise) from a signal


    Altair Activate Swingup Pendulum
    Inverted pendulum by coupling multibody dynamics with controls (through co-simulation of MotionSolve and Activate)


    Altair Activate Integrating CarSim via FMI
    The Functional Mock-Up Interface is used to interface Activate with CarSim


    Altair Activate RLC-circuit with different modeling approaches
    Math, signal, and physical based modeling


    Altair Activate Requirements Management
    Activate Integration with the Systems Engineering Tool XLDyn


    Altair Activate Mechatronic System Engineering
    This webinar outlines how 1D block diagrams can be successfully combined with 3D non-linear multibody systems for model based development of mechatronic systems. Examples include an active suspension systems and a robotics application.


    Altair Activate Rotational system
    A rotational-translational system including damping due to friction


    Altair Activate Clutch
    A dry-plate clutch used to transmit power from engine to driven wheels


    Altair Activate Accelerometer modeling
    A mechanical accelerometer using transfer functions


    Altair Activate Hoistway Modeling
    A highrise building roped hoistway elevator system


    Benchmarking by FEA: Best Practices & Key Quality Checks to Verify Results Accuracy
    This guest contribution on the Altair blog is written by the ESRD team, a member of the Altair Partner Alliance

    Evaluate the Largest Assemblies in Minutes with SimSolid
    Moving stage for the Qintai Culture & Art Center in Wuhan, China.
    The CAD assembly used for the analysis consisted of 7738 parts, including hundreds of bolts and welds. It required approx. one hour to import and setup the model, 30 minutes to solve the analysis on a regular laptop. SimSolid model created by: INNEO.

    Image source: SBS Bühnentechnik GmbH

    Dynamic Motion in Altair Inspire
    Altair Inspire includes a powerful and intuitive environment for investigating system motions of moving parts

    Fit PolyNURBS in Altair Inspire
    The new Fit PolyNURBS feature allows you to automatically wrap optimization results with PolyNURBS. This option can be found on the optimization Shape Explorer.

    Spot Welds in Altair Inspire
    With Altair Inspire you can easily create spot welds for sheet metal parts design

    Altair Inspire Load Case Tables
    Easily organize and manage all boundary conditions with load case tables

    Friction in Joints in Altair Inspire
    Friction can now be considered in setting up dynamic motions

    Suppress/Unsuppress Entities in Altair Inspire
    Joints, fasteners, and motion entities (for example, springs or motion contacts) can now be suppressed. This feature is useful for studying the effects of a given entity on system behavior or when debugging a model

    Altair Inspire Overhang Shape Controls
    Optimal lightweight designs can be defined in Altair Inspire taking in account several constraints for additive and traditional manufacturing processes, including the overhang angle for 3D printed parts.

    Altair SimLab: The New Platform for Multiphysics
    Altair SimLab: The New Platform for Multiphysics
    Gunaseelan Krishnasamy, Vice President, SimLab Development, Altair

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    Altair HyperLife New Feature Overview
    HyperLife is a new Fatigue application that is being released with version 2019. See an overview of this new product and the features it contains.


    Altair HyperLife Execute the Fatigue Setup
    The Evaluate tool allows you to run the Fatigue Analysis, and subsequently load your results in the Results Explorer to visualize the Damage and Number of Cycles to Failure contour.


    Altair HyperLife Creating Fatigue Events
    The Load Map tool serves as a typical Signal processing utility where you can import repetitive load history files. You can also create a simple constant amplitude or block loading cycles with a single click.


    Altair HyperLife Fatigue Modules Selection
    A collated icon enables you to choose the type of fatigue analysis to be run.


    Altair HyperLife Material Assignment
    The Material tool allows you to create, store, and manage the Fatigue material property assigned to parts. This tool is preloaded with a library of Fatigue material properties, from which you can choose from. You can also load materials from your own database or create new materials in the session.


    Altair HyperLife Stress Life Analysis
    Uniaxial and Multiaxial assessment options with multiple Mean stress correction theories. Various stress combination methods are available for Uniaxial assessment. Critical plane implementation for Multiaxial assessment.


    Altair HyperLife Seam Weld Fatigue Analysis
    Structural stress method implementation for Seam welds idealized with plate or shell elements. The approach is based on VOLVO method. Supported weld type is FILLET weld and the weld lines (root and toe) are automatically identified.


    Altair MotionSolve New Feature Overview
    View a high level overview of the new features available within MotionSolve 2019.


    Durability & Comfort Simulations with MotionSolve
    Our goal was to help engineers developing ground vehicles to determine fatigue life of components and improve driver comfort. Vehicle-specific simulation events have been added or streamlined to closely mimic standard physical tests performed in a lab (such as with N-post shakers) or on a test track.


    MotionSolve Examples Library
    The MotionSolve examples library has been added to provide users with resources to learn MotionSolve on real world type models.


    General Machinery Solutions with MotionSolve
    Our goal was to help users more easily build and simulate complex systems. To this end, we have added a library of higher-level modeling elements including cables, pulleys, and winches; linear actuators, struts, & rods; as well as gears and cams – obviating the need for users to separately define parts, markers, and joints for these elements.


    Generic Modeling Improvements with MotionSolve
    Many other enhancements in this release were designed to enable users to assemble and solve models to evaluate product behavior much faster, especially for vehicle simulations.


    System Design Solutions with MotionSolve
    Much of the MotionSolve and MotionView multi-body modeling and simulation technology has been incorporated into Inspire Motion to enable system design closely tied to 3D CAD geometry.


    Altair HyperStudy New Feature Overview
    View a high level overview of the new features available within HyperMesh 2019.


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