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New sim code
09-09-2012, 08:09 AM, (This post was last modified: 09-09-2012, 08:12 AM by MiguelM.)
#32
RE: New sim code
(09-08-2012, 06:35 AM)NaN Wrote: A small update.

Current ABS, TCS are adjusting per wheel brake value to match tire ideal slip(maximum grip). They don't deal with car stability though. Thus I've been trying to figure out a simple stability control(using brakes too). Unfortunately it is a bit more involved to infer current car state, identify over steer and adjust the brakes correctly to reduce it. A few naive attempts didn't work as expected.

I really would like this to be working before making a release as it would help the AI and keyboard drivers controlling the car. This means delays though.

If I may...

Toyota details its system (VSC, not the much more advanced VDIM in all Lexus) the following way:

Quote:Yaw rate sensor: The sensor is installed parallel to the vertical axis of the vehicle. It detects only the rotational angular velocity (yaw rate) around the axis.

G sensor: This sensor is set in a horizontal position near the center of gravity of the vehicle. It detects acceleration in the longitudinal and lateral directions.

Steering angle sensor: This sensor is installed on the back of the steering wheel, and directly detects the driver's steering operation.

Brake pressure sensor: This sensor is installed on the VSC hydraulic control unit to detect changes in brake pressure.

Wheel speed sensor: This sensor is set at each wheel to detect each wheel's rotational angular velocity.

Throttle angle sensor: This sensor detects the driver's acceleration pedal operation and the throttle angle when engine output is controlled by VSC.
VSC hydraulic control unit: The TRC and ABS functions work when wheels slip on acceleration and deceleration. The VSC function works when the vehicle skids. The unit supplies hydraulic pressure to control each wheel.

Throttle actuator: It opens and closes the throttle valve when the VSC controls engine output.

The bold, underlined parts are, I suspect, what most physics engine deal with.

I know a crude, basic measure found in some platforms is to use a combination of a certain percentage of the contact patch sliding and yaw angle variation.

As I am giving my first steps with vDrift I fear I cannot help much more than this.
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Messages In This Thread
New sim code - by NaN - 01-17-2012, 12:41 PM
RE: New sim code - by NaN - 08-27-2012, 03:59 PM
RE: New sim code - by NaN - 08-28-2012, 10:59 AM
RE: New sim code - by NaN - 08-29-2012, 02:32 AM
RE: New sim code - by NaN - 08-29-2012, 07:23 PM
RE: New sim code - by nomoo - 08-30-2012, 02:23 AM
RE: New sim code - by NaN - 08-30-2012, 03:01 AM
RE: New sim code - by NaN - 08-30-2012, 05:17 AM
RE: New sim code - by NaN - 08-30-2012, 07:04 AM
RE: New sim code - by NaN - 08-31-2012, 09:43 AM
RE: New sim code - by NaN - 09-02-2012, 11:46 AM
RE: New sim code - by zimluura - 09-02-2012, 02:47 PM
RE: New sim code - by NaN - 09-03-2012, 08:18 AM
RE: New sim code - by NaN - 09-08-2012, 06:35 AM
RE: New sim code - by MiguelM - 09-09-2012, 08:09 AM
RE: New sim code - by joevenzon - 09-09-2012, 12:38 PM
RE: New sim code - by MiguelM - 09-15-2012, 09:17 AM
RE: New sim code - by NaN - 09-15-2012, 11:10 AM
RE: New sim code - by zimluura - 09-16-2012, 10:38 AM
RE: New sim code - by joevenzon - 09-18-2012, 11:20 AM
RE: New sim code - by MiguelM - 09-23-2012, 03:02 PM
RE: New sim code - by joevenzon - 09-27-2012, 11:31 AM
RE: New sim code - by NaN - 09-16-2012, 12:29 PM
RE: New sim code - by NaN - 09-23-2012, 06:01 PM
RE: New sim code - by MiguelM - 09-28-2012, 07:24 AM
RE: New sim code - by joevenzon - 09-28-2012, 11:31 AM
RE: New sim code - by MiguelM - 09-28-2012, 12:52 PM
RE: New sim code - by NaN - 10-12-2012, 10:40 AM
RE: New sim code - by NaN - 10-13-2012, 08:09 AM
RE: New sim code - by NaN - 10-15-2012, 02:23 PM
RE: New sim code - by charlieg - 10-16-2012, 08:03 PM
RE: New sim code - by NaN - 10-17-2012, 02:41 PM
RE: New sim code - by ghiboz - 10-17-2012, 04:03 PM
RE: New sim code - by NaN - 10-17-2012, 04:23 PM
RE: New sim code - by joevenzon - 10-17-2012, 10:34 PM
RE: New sim code - by NaN - 10-18-2012, 09:52 AM
RE: New sim code - by NaN - 10-20-2012, 03:50 PM
RE: New sim code - by NaN - 10-21-2012, 07:53 PM
RE: New sim code - by NaN - 10-22-2012, 03:47 PM
RE: New sim code - by NaN - 10-22-2012, 05:14 PM
RE: New sim code - by NaN - 12-08-2012, 02:05 PM
RE: New sim code - by charlieg - 12-10-2012, 12:35 AM
RE: New sim code - by GunChleoc - 12-10-2012, 10:43 AM
[No subject] - by NaN - 02-13-2012, 09:59 AM
[No subject] - by NaN - 02-13-2012, 10:43 AM
[No subject] - by NaN - 08-06-2012, 06:44 AM
[No subject] - by NaN - 08-08-2012, 10:32 AM
[No subject] - by NaN - 08-08-2012, 10:43 AM
[No subject] - by berzingue - 08-09-2012, 02:25 PM
[No subject] - by NaN - 08-10-2012, 04:21 AM
[No subject] - by berzingue - 08-10-2012, 09:56 AM
[No subject] - by NaN - 08-10-2012, 10:04 AM
[No subject] - by NaN - 08-10-2012, 10:10 AM
[No subject] - by berzingue - 08-10-2012, 11:02 AM
[No subject] - by joevenzon_phpbb2_import3 - 08-10-2012, 11:18 AM
[No subject] - by berzingue - 08-10-2012, 02:38 PM
[No subject] - by NaN - 08-10-2012, 03:36 PM
[No subject] - by NaN - 08-16-2012, 12:18 PM
[No subject] - by NaN - 08-22-2012, 02:59 PM
[No subject] - by NaN - 08-22-2012, 04:05 PM

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