v0.11.0

Multiple feature improvements and bugfixes:

• Added ability to reduce to surfaces when loading superelement data from exodus files
• Added ability to output transformation shapes from System objects
• Added better error messages when indexing with invalid coordinates
• Added ability to specify which modes to create local coordinate systems for when constructing geometry from exodus files
• Added significantly more rattlesnake functionality
  • Read spectral data from random vibration and system identification
  • Read aligned transient data from transient testing
  • Read modal data from modal testing
  • Read multi-stream output files
  • Added ability to output rattlesnake specification files from NDDataArray objects
• Added a SDynPy Logo
• Added a method to get the coordinate directions as a string from a CoordinateArray
• Changed coordinate transforms to allow N-dimensional data transforms
• Added a method to join data objects in the abscissa dimension
• Fixed tolerances on matrix symmetry checks
• Added ability to reconstruct FRFs from complex modes.
• Fixed a bug in conversion between complex and real modes and specify the angle to collapse to
• Fixed a bug in ASD selections where if a sign was negative it would be missed
• Improved the modeshape fitter in PolyPy to be a true multireference fitter.
  • Known issue: still need to implement some kind of weighting to the modeshape fitter
• Added documentation to discuss degree of freedom selection in a test
• Greatly simplified the coordinate transformation functions for shapes and data
• Added functionality for reducing shapes to common sets of degrees of freedom
• Added functionality to select nodes by global positions in a geometry
• Updated time integrate functions to not create full state-space matrices if the degrees of freedom are not needed for output or input
• Added ability to select node ids to compute global positions for
• Added ability to ignore missing degrees of freedom in coordinate transformations
• Added functions for looking at FRF and CPSD conditioning and singular values
• Updated GUIPlot so that it can compare an arbitrary number of signals instead of just two.
• Significantly improved MIMO forward and inverse calculations
• Added FRF inverse package for more flexibility
• Added plotting functions to visualize conditioning of FRF matrices
• Added a class to represent an impulse response function
• Added causality enforcement
• Added constant overlap and add functionality to split time histories into measurement frames and recombine them
• Added a T-shaker reader and new dependency (npTDMS)
• Added time alignment functions
• Added sine wave excitation to simulate_test
• Added zero-padding functions for NDDataArrays
• Added interpolation functions for NDDataArrays
• Added functions to get abscissa spacing more easily
• Moved sensor optimization into ShapeArray objects for easier access
• Fixed issue with Exodus file reader where models without elements resulted in errors
• Fixed issues with GUIPlot and duplicate coordinates
• Added ability to compress id numbers in geometry objects
• Changed connectivity arrays into uints and fixed a bug in traceline connectivity
• Added additional signal generation types
• Added Shock Response Spectra (SRS) functions in signal processing
• Added ability to do time integration using TimeHistoryArrays
• Added SRS capabilities into SDynPy data objects and ability to create SRSs from time histories
• Added ability to recover internal state information over time when time integrating
• Changed how plot_asd and compare_asd work to make them easier to use
• Added ability to compute time histories using sums of decayed sines to satisfy a specified SRS
• Updated documentation on inverses
• Updated Rattlesnake imports to allow an incomplete test to be loaded

v0.6.0

Multiple feature improvements and bugfixes:

• Added a geometry fitting module
• Added a Sdynpy Showcase to give an example that doesn't rely on external files
• Added additional content in the Modal Tutorials
• Modified VID3D reader to create subsets from 2D element locations
• Changed NDDataArrays to save to .npz file so the function type can be saved as well
• Added a function to create a physical damping matrix from modal parameters
• Added ability to specify output degrees of freedom when requesting state space matrices from systems
• Added ability to read system identification data from new Rattlesnake versions
• Added ability to read modal data from new Rattlesnake versions
• Added ability to save Rattlesnake Random Vibration specification from SDynPy Power Spectral Density Matrices
• Added modal scale factor and orthogonality calculations
• Added ability to use PyQt6 because new M1 Macs seem to have trouble using PyQt5
• Added ability to specify max hammer frequency in simulate_test
• Fixed bug in code-coverage pattern matching
• Fixed a bug in pseudoinverse definition
• Fixed a bug in indexing
• Fixed a bug in SignalProcessingGUI
• Fixed a bug with PyVista changing names of properties
• Added a test for force broadcasting in CoordinateArrays
• Added a test for indexing

v0.5.1

Multiple feature improvements and bugfixes:

• Overhauled FRF functions to add new techniques (H2, H3, Hv)
• Updated simulate test to truncate steady state time
• Continued to work on modal tutorials for experimental modal analysis
• Added ability to specify frequency lines used in shape fitting
• Added copyright text to files for initial release
• Added a license file
• Updated clicking events to ensure they are inside the plots
• Improved docstring documentation
• Cleaned up some code using autopep8
• Added functionality for computing MIMO vibration forward and backward problems
• Added better save and load functionality for data objects
• Renamed GUIFRF to SignalProcessingGUI
• Added transmission simulator substructuring example problem to documentation
• Made outer product work for n-dimensional arrays
• Added matrix object for bookkeeping operations
• Fixed unv writer for ShapeArray
• Added significant functionality to PowerSpectralDensityArrays
• Added MIMO vibration example problem to documentation