I'm using Adams/Adams car on a multibody model of motorcycle which has PAC MC tire model. Can I modify the PAC MC Tire model in order to have a lateral and radial stiffness instead of a vertical stiffness ?
I'm using Adams/Adams car on a multibody model of motorcycle which has PAC MC tire model. Can I modify the PAC MC Tire model in order to have a lateral and radial stiffness instead of a vertical stiffness ?
Twenty+ years ago I had a miserable experience attempting eigenvalue/vector methods with motorcycle models in ADAMS/View that included relaxation length. Six years ago I replicated the miserable experience with VI-Motorcycle.
I went back to View and wrote a time domain test that was equivalent to the "hip flick" I perform when testing weave damping on real motorcycles. I wrote some postprocessing in Octave (which is free) to fit a damped sine wave to a portion of the roll response history and extracted frequency and damping ratios from that.
It also works for wobble/flutter damping and isn't contingent on any particular model construction or toolkit. It further has the advantage of being the method that is used for postprocessing the test data from a real motorcycle, which means you are correlating like for like.
You can administer the hip flick in any condition you like - straight line, mid corner, etc. I produced some "root locus" plots that were demonstrably similar in character to all Robin Sharp's work so I ended up pretty comfortable with it.
Twenty+ years ago I had a miserable experience attempting eigenvalue/vector methods with motorcycle models in ADAMS/View that included relaxation length. Six years ago I replicated the miserable experience with VI-Motorcycle.
I went back to View and wrote a time domain test that was equivalent to the "hip flick" I perform when testing weave damping on real motorcycles. I wrote some postprocessing in Octave (which is free) to fit a damped sine wave to a portion of the roll response history and extracted frequency and damping ratios from that.
It also works for wobble/flutter damping and isn't contingent on any particular model construction or toolkit. It further has the advantage of being the method that is used for postprocessing the test data from a real motorcycle, which means you are correlating like for like.
You can administer the hip flick in any condition you like - straight line, mid corner, etc. I produced some "root locus" plots that were demonstrably similar in character to all Robin Sharp's work so I ended up pretty comfortable with it.
