prog_models v1.5

[teubert]

Release v1.5

• New model type: Direct Models. Direct Models directly map current state and future load to time of event, rather than state-transition models which simulate forward to calculate time of event
• New model types that combine multiple models:
  • EnsembleModel: combinations of multiple models of the same system where results are aggregated
  • CompositeModel: combinations of models of different systems that are interdependent
• New Model Type: Aircraft flight model interface, AircraftModel. Anticipated prognostics applications with the aircraft flight model include estimating and predicting loading of other aircraft systems (e.g., powertrain) and safety metrics.
• New Model: Implemented Small Rotorcraft AircraftModel
• New DataModel: Polynomial Chaos Expansion (PCE) Direct Surrogate model
• Initial transition of Input/State/OutputContainer and SimResult to use Pandas DataFrame. This release will bring the interface more in compliance with DataFrames. v1.6 will fully transition the classes to DataFrames.
• Implemented new metrics that can be used when calculating error: Root Mean Square Error (RMSE), Maximum Error (MAX_E), Mean Absolute Error (MAE), Mean Absolute Percentage Error (MAPE), and Dynamic Time Warping (DTW)
  • Error calculation metric can now be changed in estimate_params
• Revamping integration:
  • New integration methods: RK4 and methods from scipy.integrate
  • Integration is now set at the model level. For continuous models the specified integration method will apply when calling next_state
• Python 3.11 support
• Various bug fixes and performance improvements

Acknowledgements

Thank you to our interns Aditya Tummala (@aqitya) and Miryam Strautkalns (@mstraut) for their contributions to this release.

The changes in this release were produced in part by Northrop Grumman under a contributor license agreement. Thank you NGC!

This release includes contributions from NASA's Autonomous Spacecraft Operations (ASO), Data and Reasoning Fabric (DRF), System Wide Safety (SWS), and Transformative Tools & Technologies (TTT) projects. Thank you for your support!

---

This discussion was created from the release prog_models v1.5.