cosin software 2025-4 release notes

General cosin software aspects

1. fix: certain arithmetic expression evaluations were wrong
2. minimum supported emulated version lifted to 2016-3
3. improved error and warning messages statistics, cleanly discriminating tasks and cases in mutli-threaded mode
4. maximum spline look-up table sizes increased
5. new pane in launchpad to allow fast access to all example user-defined models, and build them with one mouse click
6. improvements in arithmetic expression evaluation: potential thread safety issue avoided, increased number of simultaneously open expressions

cosin graphical user interface (GUI)

1. detailed error message added to GUI if temp directory cannot be opened or created
2. made sure cosin windows don’t overlap dock if on the left of the screen
3. made sure option -noerrwin works for info windows as well

FTire/core

1. fix: bottoming hysteresis data could not be set to zero
2. fix: in online animation, contact force vectors sometimes could not be activated
3. accuracy of flexible rim deformation influence on sidewall deflection improved

FTire/sim

1. full support of csv-files as alternative to ASCII mtl-files, both to be written by FTire/sim and to be shown by cosin/ip

FTire/fit

1. fix: friction validation shows warnings even if validation worked for all cases
2. fix: parameter ’nominal lateral stiffness‘ was not updated during lateral stiffness test check-in
3. user-defined score values for FTire/fit test cases introduced
4. simulation duration for friction cases made adjustable

cosin/tools

1. fix: default setting for csv separator is semicolon
2. added high-pass filters to arithmetic expressions and to cosin/ip
3. more general low-pass filter functionality in cosin/ip
4. new plot kind ‚distribution density‘ in cosin/ip
5. new cosin/io functions: step() and ramp()
6. new set of automatically generated test signals for cosin/ip
7. PI controller added to arithmetic functions
8. allow non-equidistant time domain signals when filtering in cosin/ip and adjust cut-off frequency treatment

cosin/tools for roads

1. fix: adding a center-line to an rgr file extracted from an rdf file did not work
2. fix: inaccurate PSD results displayed in 2D road analysis
3. fix: rgr build with transformed center-line did not work properly
4. improved accuracy for non-square PSD realizations (long roads), enabling long longitudinal waves even if road is narrow
5. improved error message in rgr creation
6. improved PSD visualization for road data files

cosin/tools for tires

1. fix: changing parameters in emulated mode might have not worked properly
2. fix: d.o.f. animation might have been incorrect
3. fix: in thermal model, changing ’smooth‘ check-box resets thermal parameters to default values
4. fix: in thermal model, look-up table for ‚factor friction change vs. temp.‘ could not be defined
5. fix: MF 2002 export accuracy improved
6. fix: output of FTire parameter ‚rim_flange_contact_stiff_progr‘ might have been missing when creating a new FTire data file
7. improved convergence in cornering stiffness computation for fingerprints
8. made search strategy selectable for data files when creating database
9. more error handlers added to database creator
10. several improvements in PAC 2002 model export

CTI (cosin tire interface)

1. new cti API function: ctiSetRimDisplacements() to connect user-defined dynamic rim models; for more info, see cti.pdf

Documentation

1. cosin/rgr documentation revised
2. CTI documentation revised
3. FTire/fit documentation reformatted