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Appendix
Get help for the optional libraries that are available in the Extension Manager.
Multibody Processing Library
The Multibody Processing library supports multibody-related, multi-disciplinary workflows and system-level vibration analysis in time and frequency domains.
cpsdplot
Plot MotionSolve Frequency Response Functions (FRFs) estimated from output/input signals cpsd versus input signals pwelch.

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Appendix
Get help for the optional libraries that are available in the Extension Manager.
- Multibody Processing Library
  The Multibody Processing library supports multibody-related, multi-disciplinary workflows and system-level vibration analysis in time and frequency domains.
  - cpsdplot
    Plot MotionSolve Frequency Response Functions (FRFs) estimated from output/input signals cpsd versus input signals pwelch.
  - dsacpsdplot
    Plot MotionSolve Dynamic Signal Analysis (DSA) result component in time and frequency domain.
  - dsafftplot
    Plot MotionSolve Frequency Response Functions (FRFs) computed from MotionSolve XML and related A, B, C, D state matrices.
  - dsafrfplot
    Plot MotionSolve Dynamic Signal Analysis (DSA) using Frequency Response Functions (FRFs) computed from the MotionSolve XML and related A, B, C, D state matrices.
  - fftplot
    Plot MotionSolve Fast Fourier Transforms (FFTs) computed from output signals.
  - frfplot
    Plot MotionSolve Frequency Response Functions (FRFs) computed from XML and related A,B,C,D state matrices.
  - mbcrossvalue
    Extract value crossing data that is used to detect time of events in order to compute some response over a reduced time domain by leveraging the corresponding index range.
  - mbindexatvalue
    Extract value crossing data, used to detect the index of the time of events in order to compute some response over a reduced time domain by leveraging the corresponding index range.
  - mbipsd
    Compute Inverse Power Spectral Density (PSD) that is used to define an excitation time domain signal from a PSD profile.
  - pulley
    Define a pulley component to parametrize the definition of a cable system.
  - tangent
    Define a tangent line to parametrize the definition of a cable system.
  - winch
    Define a winch component to parametrize the definition of a cable system.
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cpsdplot

Plot MotionSolve Frequency Response Functions (FRFs) estimated from output/input signals cpsd versus input signals pwelch.

Attention: Valid only with Altair Product Integration Extension

Syntax

cpsdplot(xml,typ,res,com,reft,refr,refc)

cpsdplot(xml,typ,res,com,reft,refr,refc,tw)

cpsdplot(xml,typ,res,com,reft,refr,refc,tw,few)

Inputs

xml: XML file names (without extension).; Type: char; Dimension: cell
typ: Result type.; Type: char; Dimension: string
res: Result name(s) / request(s).; Type: char; Dimension: string | cell
com: Result component(s).; Type: char; Dimension: string | cell
reft: Reference result type.; Type: char; Dimension: string
refr: Reference result name / request.; Type: char; Dimension: string
refc: Reference result component.; Type: char; Dimension: string
tw: Time window window in a 2-element vector form.; Type: double; Dimension: vector
few: Frequency exponent window in a 2-element vector form.; Type: double; Dimension: vector

Examples

Example with results from a landing gear model.

cpsdplot({'./LandingGear_Retracted/ldg_retracted';'./LandingGear_Deployed/ldg_deployed'},'Expressions','dxyz',{'DXleft';'DYleft';'DZleft'},'Expressions','drag','FXright',[0.2,10],[0.5,2.5]);

Comments

This function creates a comparison plot of MotionView results in time and frequency domains by estimated FRF between multiple outputs signals and one single input signal (leveraging cross power spectral density).