cosin software 2018-1 release notes

cosin

1. geometry packer for cosin animation window introduced
2. widget boundary visualisation in animation settings GUI introduced
3. warning messages if widgets in animation window overlap
4. slider labels in animation window moved outside slider fields (if large enough), to improve readability
5. redesign/simplification of road visualisation specification for animation window
6. output of undefined variable name in cosin/calc’s evaluation of arithmetic expressions
7. maximum number of roads and tires changed to 64 each

FTire

1. speed-mode from $parameters data block now dominant over respective command-line option, allowing to run several instances of FTire/sim within FTire/fit at different speed modes
2. source of speed-mode value written as message
3. made sure pre-processing is not repeated if only animation settings are changed
4. fix: loading of several different tread patterns made thread-safe
5. new compatibility date 2017.11.15:
   • improved contact patch triangulation algorithm in case of large tread shear displacements
   • more robust computation of steady-state contact patch geometry and contact forces if tread pattern is given by image
   • made sure tread pattern repetition follows same rules and is exactly the same in all speed modes
   • more accurate computation of sidewall height, taking into account exact ETRTO compliant rim flange geometry
   • numerically more robust steady-state tire initialisation in case of strongly inclined roads
   • speed mode 6 now provides minimum TYDEX output and accelerated rgr evaluation
6. initial steady-state computation made even more robust, to work well with initial vertical velocity
7. on-line plots and footprints for more than one tire instance enabled in animation window
8. made sure camera position is properly adjusted in first animation frames, in case of multiple tires
9. RT level 5 changed from ’no TYDEX output‘ to ‚Minimum TYDEX output and extra fast rgr road evaluation if applicable‘
10. cross-section plot improved
11. common unified output signals for FTire, FETire, and HTire introduced
12. fix: made sure diagnosis animation starts with correct camera velocity
13. error condition set and preprocessing aborted if specified tread pattern image is not found or is not loadable

FTire/fit

1. fix: calibration of forces/moments in FTire/fit taken now into account in RMS calculation also, rather than only in plot output
2. ‚inflation pressure variability tolerance‘ introduced as new FTire/fit setting value
3. in-plane cleat test quality indication in FTire/fit menu fixed

FTire/sim

1. made sure plot file is generated if scopes are to be shown in animation
2. new FTire/sim example script ‚driven drum‘

cosin/tools

1. record-files now can be opened in cosin/ip
2. fix: ‚trim file‘ function in cosin/ip
3. cosin/ip load of several huge files fixed and accelerated
4. animation settings GUI reachable from replay GUI

cosin/tools for Tires

1. fix: display of used/overdetermined data in cosin/tools for tires tir-file editor
2. fix: save option in interactive FTire analysis animation window
3. new convenient tir-file comparison option added, only showing those parameter deviations beyond a definable threshold

cosin/tools for Roads

1. standard views (top/side/front) introduced and made selectable in 3d road visualisers
2. animation speed-up for complex scenes with constant data used in road visualiser
3. new export function in for all kinds of roads: ‚export to rgr‘, saving road profiles and surfaces even from user-defined models into an rgr file, for use in record file replay etc.
4. center-line extraction from rgr file generalised; both coarsening and refinement now possible
5. color legend added to all modes of road visualiser
6. cleat list and cleat properties is shown when loading a clt file in cosin/tools
7. interpolated center-line data export to mtb-file, for analysis of smoothness etc., added to cosin/tools
8. fix: increment handling when extracting center-line files from road data files
9. new mtb export from center-line data
10. improved road visualiser:
    • high/low resolution made selectable on the fly
    • camera focus follows selected road section
    • pos/length slider selection instead of smin/smax
11. new rgr center-line analysis option
12. footprint trajectories from arbitrary FTire simulations can now be added to 3d road visualisation
13. user-defined 3d road visualiser improved and accelerated for rgr roads

cosin/road

1. predefined road sizes in user-defined 3d road visualiser introduced
2. combination of rotating rdf drum with rgr roads introduced
3. moving curb road added to example road data files
4. optional PT1 filter of center-line data in rgr files added
5. example road psd.rgr added
6. increased accuracy when reading center-line data with non-zero data decimation
7. extra fast rgr evaluation both w/o and with center-line, w/o and with additional road transformation, w/o and with variable friction, and for all extrapolation modes introduced
8. fix: rgr files with header and trailing exclamation mark, but w/o binary data made valid
9. new road type: free rotating drum, driven by tire
10. new example road file ‚driven drum‘

CTI

1. fix: CTI function ctiGetRoadSize output for crg roads
2. fix: ctiSetNotify and ctiSetAffinity handling while running in multithreaded mode
3. added unit info for ctiGetRoadSize
4. strictly restricted use of ctiEvaluateRoadHeight in case of license protected data
5. exact RTF measurement added to statistics output
6. new CTI function ctiSetDrumTorque, in conjunction with fully automatically operated drum test-rig defined by 2D road type ‚drum‘; drum is driven both by (a) all wheels identified to be located above drum, and (b) by external torque specified by ctiSetDrumTorque, if mom_of_inertia is set for drum in road data file
7. new CTI function ctiSetOutputFilePrefix, to define another set of output files when time loop is executed several times in sequence for the same tire
8. new CTI function ctiWriteRoadData, to write road data of x/y region swept during previous simulation
9. new CTI demo program ctiResetDemo.c, ctiMtResetDemo.c, and ctiRoadEvalDemo.c
10. allow ctiCloseTire to be called repeatedly
11. added new reset mode (=9) to ctiComputeForces* and ctiComputeForces*List functions

Documentation

1. cosin/tools for tires documentation updated
2. cosin/tools for roads documentation updated
3. cosin/rgr documentation updated
4. FTire/parameterisation documentation updated and completed with FE-based documentation chapters
5. missing data items added to FTire/model documentation
6. legal notices added to FTire/fit documentation