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+--- Thread: Clutch not locked but not slipping?? (/showthread.php?tid=1617)
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- NewLife - 03-17-2012
NaN Wrote:Cool. I'll have a look.
After endless tries i succeded in obtaining a somewhat working clutch.
This is the im using:
Code:
public float GetDragImpulse(float engine_speed, float drive_speed, float engineInertia, float drivetrainInertia, float ratio, float engineTorquedt){
float drivetrainInertiaR=drivetrainInertia/ratio;
impulseLimit=clutch_position*torqueCapacity*Time.deltaTime;
float lambda=(engineInertia*drivetrainInertiaR*(drive_speed - engine_speed) - drivetrainInertiaR*engineTorquedt)/(engineInertia + drivetrainInertiaR);
lambda = Mathf.Clamp(lambda, -impulseLimit, impulseLimit);
return lambda;
}engineTorquedt = engineTorque*Time.deltaTime;
drivetrainInertia=1;
engineInertia=0.5f;
drivetrainInertia is summed to each wheel inertia (1.8f).
This works with 50Hz and 1 single iteration.
Im still experiencing that infamous clutch lag, so I had to use a patch in order to decrease ratio value in drivetrainInertia/ratio by a value inverse proportional to the same ratio.
Let me know what you think.
- NaN - 03-17-2012
No idea how to do it make it work. It is comparable to try running a rigid body simulation with a single iteration. Maybe there is a way to fake the clutch by scaling engine torque or something like that.
- NewLife - 03-22-2012
NaN Wrote:No idea how to do it make it work. It is comparable to try running a rigid body simulation with a single iteration. Maybe there is a way to fake the clutch by scaling engine torque or something like that.
Hi NaN eventually i make it work in a satisfying way by subtracting wheel impulse to clutch drag impulse calculation:
Code:
float lambda=(engineInertia*drivetrainInertiaR*(engine_speed - drive_speed) - x + drivetrainInertiaR*engineTorquedt)/(engineInertia + drivetrainInertiaR);where x is wheelImpulse*engineInertia/ratio
in this way simulation runs satisfactory with 50Hz and 1 iteration (and its playable down to 20Hz). Soon i'll post a link for the demo.
- NaN - 04-01-2012
Nice job. Sorry for the late reply, busy week.