cosin software 2014-4 release notes

1. implementation of own, highly optimized math library for trigonometric functions as well as all other used mathematical functions
2. major extensions to movie generation: highest quality mp4 movie files (default; other codecs available as well) can be created without manual intervention on all platforms (Win/Linux/Mac) now
   
3. reworked solver numerics to ensure platform independent results up to machine precision. Old feature dates might be affected. See documentation on this topic.
4. single frame ‚animation‘ supports modification of frame and image details
5. some more, timely uncritical output signals provided in real-time mode
6. made sure that all GUI windows always fit on the screen, even with small screen size or low resolution
7. location of contact patch and running diagrams in animation window made user-controllable
8. more animation details even in higher speed modes
9. light source placement in animation windows improved and made adjustable
10. fix: memory allocation required for FTire linearization made fail-safe even for highest-resolution FTire meshes
11. optional detailed quarter-car model provided for cleat tests in FTire/fit
12. HTire (Pacejka 2002) model browser improved in cosin/tools
13. new function: mirroring of rgr files provided in cosin/tools
14. footprint boundary computation in FTire/fit made thread-safe, and parallelized
15. sample simulation scripts for FTire/sim and FTire/fit revised
16. documentation of CTI functions revised
17. fix: usage of large tilt table angles in respective road data files for rotating tilt tables
18. fix: pipe and filter symbols in arithmetic expressions within GUI-generated strings automatically replaced by uncritical characters
19. up to four contact patches can be shown simultaneously in animation window
20. improved and extended syntax check in arithmetic expression parser
21. new logical operators in arithmetic expressions
22. maximum formula length in arithmetic expressions increased to 1024
23. several minor bug-fixes in formula parser
24. FTire animation and CAD data browser take into account material data in WaveFront files
25. in FTire/fit, priority selection of footprint size vs. radial stiffness on cleat (for determination of lateral bending stiffness) introduced
26. optional company logos added to animation window
27. fix: valid computation of transformation to contact system (only used for extra output) added in case of full 3d roads
28. few missing images added to installation package
29. size of influence patch in soft soil evaluation reduced, to reduce overlap of different wheels of a car (otherwise, MT evaluation might have been non-reproducible under certain conditions)
30. footprint comparison added to cosin/tool’s steady-state GUI
31. font sizes in GUIs revised
32. cosin launch-pad can be called from within every arbitrary directory now
33. in case of non-existing private working directory, user will be prompted if to create one
34. better control of movie frame rate in animation: new option ‚frame rate (fps)‘; new spec of slow-/fast-motion factor in cosin/mbs sim scripts
35. footprint contour plot scaling made selectable
36. further speed-up in FTire/fit’s cleat test identification through parallelized preprocessing
37. revision of FTire/fit GUI and function:
    • single paned window GUI
    • extended history function, using extra detailed listbox
    • several sort criteria for history listbox
    • taggable entries in history listbox
    • simple report generation even for ‚historic‘ versions of data file
    • several comparison functions between different identification states
    • introduction of detailed ’score file‘, to quantify measurement/simulation coincidence individually for all measurements
    • visualization of score values by respectively colored small rectangles in front of measurement list entries
    • simplified inspection of measurement contents and properties prior to check-in
    • simplified and extended control of simulation scripts and parameters after check-in
    • clear indication of proposed work-flow, through tabbed windows
    • pdf generation no longer requires any manual intervention
    • zooming of comparison images
    • friction case validation results made accessible w/o repeated computation
    • new option for steady-state check-in: average hysteresis ambiguities
    • improved removal of isolated pixels in footprint bitmaps
    • and much more
    • loadable size of replayable animation files (ogl files) increased
38. fix: corrected output of TYDEX C forces in cosin/tool’s FTire statics computation
39. fix: contact computation for forward rotating when using triangulations
40. time slider added to time-dependent 3D road visualization
41. cosin/io road data files which include road data block name in file name made accessible to 2D and 3D-user-defined road visualizer
42. measures further reduce FTire’s memory footprint
43. GUI-based FTire/sim script editor revised
44. FTire data file’s feature date automatically displayed in cosin/tools
45. output of number of warnings and errors in STATISTICS
46. apply/cancel/ok button introduced in FTire/fit settings menu
47. help button of FTire parameters (which automatically jumps to the respective entry in FTire’s model documentation) now works with most supported pdf browsers on all platforms
48. rgr export from crg: new selection ‚center-line included or separate‘
49. new function ‚diff‘ in cosin/ip simulation result plotter, to show difference between two data files with highest accuracy
50. plot-file format generated by cosin/tools replay function made selectable
51. record files (rec files) are associated with cosin/tools recorder application
52. new crg road evaluation method introduced: cosin evaluation with no 3rd-party calibration
53. optional detailed internal flex rim model added, to use computed detailed Green’s functions rather than simplifying approximations
54. torsional stiffness added to flex rim model
55. fix: occasional crashes in Matlab fixed, after pressing Esc or Ctrl-C in graphics window
56. fix: auto-scaled rdf+rgr visualization in case of detailed banking angle data in rdf file did not show rgr patch
57. fix: during statics with averaged road, non-thread-safe random number generator setting had been used
58. improved error message in rdf road evaluation added, if not enough memory available
59. flags ‚allow adding preprocessed data to tir-file‘ and ‚only pre-process if necessary‘ automatically set in FTire/fit in new files
60. fix: Pac2002 export on Mac/Linux might not have started in parallelized mode
61. create pdf files in letter format rather than A4 if actual unit system is ‚imperial‘
62. new switch in rgr-files with centerline: noconv=0,1,2 sets no-convergence policy. Automatically set to ‚fast‘ in higher speed modes, or with respective keyword in rgr header
63. new button in cosin/tools: ‚delete‘ spline data in tir-files
64. fix: contact elements in cross-section plot sometimes missing
65. new Matlab tool to convert flex rim FE results to flex rim data file (available only upon demand)
66. ‚loaded radius‘ output signal added to TYDEX output, channel 54
67. added list of supported labels to ctiPutOutputSignal() documentation
68. fix: wrapping of road files by trivial 2d rdf file might have failed under certain conditions
69. fix: assignment of cleat test conditions when running several cleat tests in parallel might have been wrong in FTire/fit under certain circumstances
70. several stability improvements in FTire/fit and FTire/sim

Known Issues

• Using simultaneously moving roads or contact bodies and FTire data files with feature date prior to 2014.05.10 might lead to wrong positioning of the road. This will be fixed in version 2015-1. As a work-around, we recommend not to set any FTire feature date if using moving roads or contact bodies.