cosin software 2018-4 release notes

Note: this version will be the last one that allows compatibility dates prior to July 1, 2015. Beginning with 2019-1, earliest compatibility date will be 2015.07.01, and, respectively, mimicked version 2015-3.

In case you are using an earlier compatibility date or mimicked version (which only is recommended in certain unavoidable cases), please make sure your data files still run properly with mimicked version 2015-3 or later.

cosin

1. format of resource statistics output improved
2. made sure no more animation window pops up in current simulation when esc key was hit, but it *does* in next simulation run
3. rapid change to predefined viewing directions introduced in animation window
4. made sure animation window is not iconified initially
5. PSD plot scaling now in dB/Hz
6. extrapolation mode in spline evaluation made selectable
7. prevent spline evaluation to report error in case of extrapolation
8. source & sinks signal expressions may now contain =-sign, for example in comparisons using >=, <=, or ==
9. new arithmetic expression functions measd(), measdd() (1st and 2nd derivative of measurement signal at arbitrary time), for use in FTire/sim etc.

cosin GUI

1. specification of car-body CAD file in animation settings GUI fixed

FTire

1. added local pressure and air flow velocity output to bso files
2. optionally create diagnosis file for pressure and air-flow visualization using Matlab
3. new Matlab tools for airflow visualization
4. agricultural W, DW, TW rim contours added, cf. ETRTO
5. new additional sidewall stiffness model added, to prevent sidewalls from being stretched
6. added OpenAL Soft library (LGPL licensed) for tire noise output
7. maximum angle increment in real-time mode for all example tires set to 2.5deg, to make them all run in real-time even at highest rolling speed
8. automatic computation of contact patch states in diagnose mode added, to enable contact patch plots in cosin/mbs simulator
9. new parameter sidewall_stretch_stiffn_factor introduced, to limit side-wall radial stretching potentially occurring with extreme camber angles
10. optionally variable lateral bending stiffness added, including highly accurate computation of respective bending beam shape functions during pre-processing
11. improvement of 2D imperfection plots
12. inner liner now shown in cross section plot (if thickness is defined)
13. increase of maximum belt bending number of degrees of freedom from 9 to 20
14. added belt layer thickness to cross section plot
15. elastic and plastic rim deformation added to output in bso-file, if flexrim model is activated
16. coordinate system handling in bso output fixed:
    • for numerical reasons, bso-files are *always* rim-fixed now
    • hub-fixed and cartesian/cylindrical coordinates selection introduced during bso-file post-processing
17. new tire surface visualization kind ‚cross sections‘ in FTire animation introduced
18. ‚time=‘ entry in all output file formats homogenized, in order to simplify user-written post-processing algorithms
19. cross-section plot improved: selection uninflated/inflated; selectable kind of geometry computation, and more
20. optional command-line-based replacement of all numerical settings by default values introduced
21. new model configuration item ‚contact elements with shearing-effective mass‘ introduced
22. new check for pre-processing necessity, making sure that data are pre-processed if *either* version or compatibility data/version has changed
23. made sure all tires appear in animation window
24. more detailed air cavity output signals
25. fix: potential sign error in air cavity reaction forces
26. improve convergence for horizontal static displacement
27. WLF transformation using tread rubber glass temperature added as alternative description of temperature influence on friction
28. tread pattern is mirrored/symmetrized together with conicity and ply-steer, if necessary
29. new output signal ‚current estimated dynamic rolling radius‘
30. rim and brake disc size calibration fixed in animation model
31. side-wall stretching added as optional component to animation window

FTire/sim

1. halt/resume plot output using SS-signal ’no_plot‘ introduced in FTire/sim
2. speed-up of GUI opening
3. automated mechanism to estimate current rolling radius (in case of free rolling tire), for usage in subsequent slip output signal calculation

FTire/fit

1. measurement recognition rules improved
2. new selection added to settings menu: in case of multiple measurement cases with same conditions ‚ask what to do‘
3. recognition of unsupported TYDEX labels improved
4. minimum thread number introduced, in addition to maximum thread number
5. made sure ‚delete‘ button in GUI doesn’t leave any garbage in contr.ftf, and thus properly manages check-in/check-out activation
6. made sure new demo project always runs through (by forcing use of default settings)
7. friction identification improved
8. detailed output of errors in forces and moments of FE load cases introduced
9. improved table output of FE load case results
10. FE load case attribution to specific stiffness parameters improved
11. ’shift into origin‘ setting made selectable
12. ‚adjust settings‘ added to project creation assistant
13. enhanced file-name based inspection/check-in of footprint bitmaps
14. new processed footprint preview during image check-in
15. new function to conveniently export cleat simulation scripts, in order to analyze a given cleat test from the command line outside FTire/fit
16. fix: under certain conditions, score values of steady-state tests were not written to sco-file
17. Tydex signal MEASNUMB recognized now
18. allowing non-trivial specification of number of signal values per row in TYDEX files added (as defined in TYDEX spec)
19. generalization of temperature signal selection: signal to be used (and which is meant by TRDTEMP in the tdx-file) can be selected in FTire/fit GUI -> Settings -> preferences
20. script for mu-slip-cases improved, to make sure it passes through origin
21. muslip sim-script improved, to make sure the complete measurement is simulated *after* transients have died out
22. cleat definition for steady-state cases in demo-project re-organized: steady-state cleats have own cleat identifier now and are no longer defined inside sim-file

FTire/link

1. Simulink models updated, all compatible now with Matlab 2015A and later
2. abort button in message window within Simulink no longer shown; abort Simulink simulations with original Simulink means instead

cosin/road

1. improved grid road animation model: circular blending, less flicker
2. unified definition of oblique cleat orientation angle, independent on drum type: changed all data items ‚direction‘ and ‚cleat_direction‘ to ‚cleat_angle‘, keeping meaning of old items exactly what it was, but setting its use to ‚deprecated‘
3. check license-protected rgr-files for correct encryption prior to checking out license
4. VI-Grade-style triangulated 3d roads supported now
5. new center-line road data format: mtl- and mtb-files with certain mandatory signals
6. fix: potential multithreading vulnerability in certain road evaluation routines
7. new example road data file cosin_function.evr

cosin/tools

1. several cosin/player improvements: fix of scene c.o.g. computation for camera control, and more

cosin/tools for tires

1. try to re-sync in record-file replay implemented
2. made sure all tir-files with relative tread-pattern file names can be loaded in all analysis tools
3. compatibility date and compatibility version selection in cosin/tools for tires simplified and generalized
4. new Matlab scripts to post-process bso-files
5. made sure Pac2002 files can be opened in GUI
6. Pac2002 export from FTire improved
7. computation and output of rdyn @ My=0 (classical free rolling) and rdyn @ Fx=0 (controlled with drive torque, theoretical correct value) in cosin/tools for tires introduced
8. consolidation of all spline specifications and their management in GUI
9. stability and step-size selection for FTire steady-state analysis improved

cosin/tools for roads

1. rgr export of ctr road data files (track files) including speed profile for lateral inclination specification added
2. fully automated rgr-file generation out of general road data file for use in real-time applications added
3. track file export to rgr completed with all cosin/io roads
4. made sure no sort of encrypted RGR file link can be visualized/analyzed
5. new clickable specification of predefined 2d plot intervals in road visualizer
6. taking into account optional banking angle of center-line import to new rgr file
7. fix: corrected computation of rounded bevel edges of inclined cleats
8. new road visualization types ‚contour plot‘ and ‚level plot‘
9. simplified view selection introduced in cosin/tools for roads
10. fix: prevent animation from crashing if visualizing center-line road without accompanying rgr data
11. GUI call of rgr generation from other road data file menu enabled
12. optional rgu file can now be applied in rgr reformat GUI
13. improved function ‚add new data to rgr‘ now allows to add or modify soft soil and variable friction data to existing rgr
14. added export of rgu-modified rgr at any arbitrary time, using ‚reformat/modify rgr‘ function
15. optional leading and trailing ramp and leading flat segment added to rgr generation
16. new tools for processing all kinds of center-line defining road data files
17. optionally plot center-line display in triangulation plot
18. center-line modification added to rgr export
19. focus optionally follows road section now in rgr/center-line visualization
20. new function in center-line manager: write detailed mtl output file with curvature and more
21. original center-line data are now shown in processed center-line test output
22. 2d road visualization made interactive, embedded in endless loop with sliders for time and scaling in graphics window

cosin/mbs

1. force feedback steering wheel support on all platforms introduced
2. cosin/mbs micro simulator (comics) made available, for FTire real-time demo together with full MBS vehicle model, without need for any 3rd-party solver
3. show complete MBS front axle in cosin/mbs simulator if requested, and embed FTire contact patches
4. force-feedback steering wheel controls documented in animation window
5. reset switch added to comics
6. convenient refresh of exported rgr files added to GUI

CTI

1. optimized state save/retrieve management implemented
2. save/retrieve FTire states to/from memory in addition to save to/from file added
3. CTI message output formatting within in 3rd-party applications improved
4. default log-file name in CTI environments set to ftire.log
5. log-file in CTI now equipped with same prefix as all other output files
6. added new CTI API function ctiSetCompatVersion to set compatibility version for a given tire handle.
7. addew new CTI API function ctiWriteStatesMemoryList to write state arrays to memory for list of tire instances in multi-threaded mode.

CRI

1. added new CRI API function criGenerateRGR to automatically generate RGR files out of general road data files. See criGenerateRGRDemo for an example how to call the new function

CRIDL (CRI Dynamic Library Wrapper)

1. added Dynamic Loader for CRI shared library (cridl.c) to simplify run-time loading

Installation

1. 3rd party distribution installers and reference packages discontinued

Licensing

1. improved error message if license doesn’t exist on license server
2. bug-fix if non-licensed soft-soil rgr is loaded
3. new second rgr license and license key for rgr encryption key implemented
4. new license check feature ‚ftire_adams‘
5. old license features ‚ftmt‘ and ‚ftrt‘ replaced by ‚ftacc‘ for accelerated FTire and ‚fthil‘ for FTire in HiL environments
6. potentially misleading licensing message in animation window improved
7. added license-status data to license trace message in case license doesn’t exist on server

Documentation

1. osin/road documentation revised
2. rim-to-road contact documentation revised