cosin software 2018-2 release notes

cosin

1. considerable speed-up of several internal functions
2. sign() function added to cosin formula interpreter
3. image loading routines made thread-safe
4. improved cosin/io data-file formatter
5. new option -nocol to unconditionally suppress coloured text output

cosin GUI

1. selection of ‚mimicked cosin version‘ introduced, to conveniently ’simulate‘ an older cosin version

FTire

1. further improved geometry packer for FTire animation window
2. fix: poor formatting in interactive footprint comparison simulation
3. steady-state animation window improved
4. improved display of sliders in animation window
5. save option in interactive analysis animation window introduced
6. road shift to improve numerical robustness during steady-state computation
7. improved specification of road visualization in animation window
8. made sure camera position is properly adjusted at animation start in case of multiple tires
9. extra fast rgr evaluation implemented in RT mode
10. more accurate cross section plot
11. new speed mode specification:
    1. accelerated mode
       • level 1: no model extensions
       • level 2: no model extensions, no extra output
       • level 3: no model extensions, no extra output, no animation, reduced resolution
       • level 4: no model extensions, no extra output, no animation, reduced resolution, fast co-simulation, only with constant step-size
    2. real-time mode
       • level 1: no model extensions, no extra output, no animation, reduced resolution, robust co-simulation, only with constant step-size
       • level 2: no model extensions, no check for bottoming, no extra output, no animation, reduced resolution, reduced extra output, robust co-simulation, only with constant step-size
       • level 3: no model extensions, no check for bottoming, no extra output, no animation, reduced resolution, reduced extra output, fast co-simulation, only with constant step-size
       • level 4: no model extensions, no check for bottoming, no extra output, no animation, reduced resolution, reduced extra output, fast co-simulation, only with constant step-size
       • level 5: no model extensions, no check for bottoming, no extra output, no animation, reduced resolution, minimum extra output, fast co-simulation, only with constant step-size, fast rgr road evaluation w/o and with curved center-line, if applicable
12. animation geometry manager improved and equipped with warning messages if widgets overlap
13. RTF measurement added to statistics output
14. error condition set and preprocessing aborted if specified tread pattern image not found or not loadable
15. new output signal ‚minimum interior cross section area‘
16. fix: more precise segment volume computation in detailed air cavity model
17. fix: more accurate air cavity reaction forces computation
18. Adams version of ISO forces/moments (TYDEX 38-43) added to cosin/ip output
19. automatic correct positioning of footprint bitmap in animation window
20. detailed and unified output of reason for refreshed pre-preprocessing
21. made sure movie generation can be controlled with F4 even if animation starts in movie state
22. improved recognition of rim rotation instability
23. rim CAD file specification simplified and redundancy removed; file name appears now at most once in tir-file
24. improved model configuration message output
25. fix: potential crash in pre-processing if both cornering stiffness (or any other steady-state rolling condition) is prescribed and thermal model is activated
26. made sure all belt output variables are well-defined and set to zero in case of non-pneumatic tire
27. provision of all eventually needed needed TYDEX signals even in highest speed mode
28. extra Ascii output of footprint boundaries provided
29. tire noise activation simplified, more physics-based squealing loudness estimation introduced

FTire/fit

1. automatically show cleat list and cleat properties when opening cosin/tools for a FTire/fit clt file
2. animation window of interactive footprint simulation improved
3. more detailed description of friction cases in FTire/fit GUI
4. quick measurement check introduced
5. proper treatment of check-in/check-out in case of multiple virtual measurement files derived from a single data file
6. direct call of cosin/tools for respective obstacle in measurement details window, if applicable
7. data-block editor integrated into FTire/fit GUI for convenient editing of cleat definitions
8. free running wheel rather than forced slip in interactive footprint simulation
9. friction cases from slip angle sweeps are simulated now with freely rolling wheel
10. footprint size included in check-in details
11. number of cross-section modifiers can be chosen in interactive simulation menu
12. footprint boundary computation simplified
13. measurement check-in messages improved
14. reading/writing of FTire/fit control file in new format made compatible with older versions
15. fix: potentially wrong Fz values in report image captions
16. correct treatment of all files referenced by tir-file within relevant FTire/fit operations
17. copying of linked files into history made user-selectable
18. wrong warning message ‚incomplete validation‘ after report generation from within history menu fixed
19. improved usability of history menu by new short-cut buttons

FTire/sim

1. new FTire/sim simulation option: follow course in a given distance, defined by road center-line
2. simplified speed mode specification in FTire/sim GUI
3. made sure FZ given as parameter does not overwrite source signal ‚deflection‘
4. all sim scripts revised and reformatted
5. source of output time span specification made selectable between tire data file and sim script

cosin/tools

1. brush-up of cosin/ip GUI
2. fix: logarithmic scaling of multiple PSD plots in cosin/ip

cosin/tools for Tires

1. new convenient tir-file comparison option, only showing those parameter deviations beyond a definable threshold
2. made sure cross section can be plotted correctly if tire data file refers to a bitmap in a relative directory
3. specification of tire structure letter (R,D,B,RF,ZR) consistently introduced in all relevant GUIs
4. tire size specification in FTire/estimate simplified
5. GUI for FTire/estimate formulae specification redesigned and completed with ‘help’ and ‘clear’ function
6. modal analysis GUI revised
7. comparison of tir-files includes byte-wise tread pattern and rim data now
8. convenient sub-model activation status and selection added to cosin/tools for tires GUI
9. missing ‚clear entry field‘ buttons added in all GUIs
10. new selection ‚linked files‘, collecting in a single menu all files that can be specified within a tir-file
11. file comparison by contents improved
12. fingerprint parameter bounds for wheel load and camber angle made selectable by user

cosin/tools for Roads

1. new rgr road example files
2. user-defined 3d road visualizer improved and accelerated for rgr roads
3. added ‚closed‘ specification and automatic recognition of ‘closed’ property to rgr roads with center-line
4. made fast rgr evaluation with center-line run properly even if center-line is closed and rgr grid length is not a fraction of center-line length
5. automatic prolongation of rgr grid of closed centerline roads, to let it cover the whole road for visualization
6. improved grid-based road visualization: sliders added, variable resolution
7. simplified specification of grid size in rgr generator
8. fast preview of new roads w/o saving new road data file
9. simplification and harmonization of rgr road generator and center-line extraction
10. new example road data file ‚flatbelt‘ in cosin/io format
11. in road builder, user can select now if rgr data are specified in curvilinear or in global coordinates
12. fix: rgu-file visualization
13. friction factor made selectable in 3d road automatic visualization
14. new feature: evaluate road at single location and show numerical result

cosin/mbs

1. made sure FTire output does not overwrite cosin/mbs output

CTI

1. rec-files now are directly loadable in cosin/ip for inspection
2. ctiEvaluateRoad() will put out info message rather than warning, and return modified road data in case of license protected data
3. banner and ‘about’ window contains source code status date
4. improved output of used speed mode and reason why it is used in FTire/sim and CTI messages
5. clean program exit if tire data file in CTI environment cannot be read/loaded
6. new CTI functions ctiReadStatesMemory(), ctiWriteStatesMemory to read/write CTI states from/to memory
7. CTI splash screen now lists CTI installation directory
8. allow ctiLinearize() to neglect modal damping (see docu for more)
9. made sure no 3rd-party environment can suppress animation if not wanted by user
10. Adams product names spelling in message file fixed
11. added mode flag to cti{Read,Write}StatesMemory to read/write all CTI states (mode=0) or only a subset of the CTI states (mode=1)
12. revision number added to CTI splash screen

Documentation

1. all documentation chapters updated
2. FE-based parameterization docu chapter added
3. new correspondence table for TYDEX signals added
4. list of parameters treated by FTire/fit added
5. new ftire_diagnosis.txt mentioned in support checklist