Tribology

The SLIM mapper analysis methods and data import methods for PCS Instrument test rigs now also work with their ETM test rig.

- fixed (rather embarrassing) bugs in functions`kin2dyn` and `dyn2kin`

- function `merge_npz` restored to earlier implementation; use more
advanced data structures to merge databases where values are not numeric or
not all databases contain the same set of keys
- function `split_del` now has additional argument `force` to overwrite existing
output files
- function `split_del` added to module `data_import`
- fixed a bug that lead function `approx_hertz_rad` to return radius `nan`
rather than `inf` for a straight line profile. added corresponding test
case
- function `approx_hertz_rad` now returns additional parameters
- function `abbottfirestone` moved to module `rough_surfaces`
- function `import_del` and `import_dir` now have an additional argument
`colheadlines` for files where the column headers span multiple rows
- bug fixes

- function `phertz` now has additional argument to indicate if mean or maximum
pressure should be returned
- clarified that Hertz equations are only valid for elliptical and circular
contacts; equations for line contacts are not implemented at the moment
- added additional test cases for Hertz equations
- fixed bug in Hertz pressure calculation that may lead to wrong results for
elliptical contacts if one of the contact bodies is completely flat
- module `rough_surfaces` added

- fixed bug that lead to data import error when using `mat` output format
- added missing package dependencies that may lead to an import error when using
data import or slim mapper processing functions
- functions `slim2thick` and `slim2thick_batch` now return color error values
for each image

- function `merge_npz` added to `data_import` module
- function `slim2thick_batch` now also returns mean thickness data for the SLIM
mapper ZERO step
- providing an output file name to the `merge_del` function is now optional
- function `merge_del` added to `data_import` module