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November 13, 2019, 07:51:52 am

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GP Bikes beta16b available! :)


m_fSteerTorque

Started by HornetMaX, October 31, 2014, 08:38:24 am

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HornetMaX

@Piboso: what is exactly m_fSteerTorque in SPluginsBikeData_t ?

  • Torque applied by the virtual rider on the handlebar ?

  • Torque applied by the environment on the front ?

  • The net torque (sum of the previous two) acting on the front ?



Also, I guess it's the same thing for all the sims (GPB< MXB, WRS, KRP), right ?

MaX.



PiBoSo


m_fSteerTorque is the total torque acting on the handlebar, minus the rider torque.
It's the same torque used for force feedback.
"Obviously your ambition outweighs your talent".

HornetMaX


HornetMaX

Second thoughts here ... would it be possible (and make sense) to have in the output plugin interface the torque applied by the virtual rider ?

MaX.

h106frp

If anyone has the data i would be interested in the peak and mean torque levels that are typically reported by the simulation.

HornetMaX

Quote from: h106frp on December 13, 2014, 04:42:03 pm
If anyone has the data i would be interested in the peak and mean torque levels that are typically reported by the simulation.

You can use this to get it: http://forum.piboso.com/index.php?topic=1151.0

MaX.

h106frp

Did a quick capture for some gentle riding on the 125cc and get between +- 100 to 250Nm ??? Seems higher than i ever thought it could be. I was assuming this would reflect the reaction required at the bars?

HornetMaX

I've already seen 300+Nm (on the 990), it sounds waaaay too high to me (just a feeling, I can be wrong).

MaX.

h106frp

Have to agree, bar end to bar end is probably 1m 'ish, for reference 130Nm is ballpark for car wheel nuts. It's almost as if it is a factor of 10 out. All the bikes i have ridden have always felt quite 'light' at the bars even with track riding 600's, need to be superman to ride this little 125cc though ;)

HornetMaX

The value you read is the environment torque: it doesn't include the torque applied by the rider which does not need to always counter the environment torque.

So it's not because w eread 300Nm that the rider is applying 300Nm. Still, it looks a bit high to me.
Also, the torque graph looks very very "noisy".

MaX.

h106frp

Thats good, not sure what is meant by environment torque though. Had a look at specs for some driving FF wheels, T500 which is considered high power for a commercial unit delivers about 6Nm at the wheel using 2*150mNm motors and a pro unit costing a small fortune can go to 20Nm - I guess these are at the limit of what can be considered sensible steering forces. What would give a simple feedback parameter?

Starting to consider a scheme for a mini moto sized bar widths - just steering axis to start though  :) would be nice to have a proper feel in the bars. Having read a bit the bike lean only needs to be an indication for riding feel as you cannot apply any meaningful steering input in this axis anyway. Link is to an interesting experiment with steering forces
http://www.superbikeschool.com/machinery/no-bs-machine.php

Im sure that will raise some comments ;)



HornetMaX

Quote from: h106frp on December 15, 2014, 09:13:04 pm
Thats good, not sure what is meant by environment torque though.


All the torque acting on the front head, minus the rider-generated torque.

MaX.