DaveW wrote: One of the Lotus engineers also suggested that we "memorized" a lap, but that was never implemented for a variety of reasons.
hardingfv32 wrote:Do you have any knowledge of lap 'memorizing' every being used in F1?
Can you expand on some of the implementation issues?
A number of "driver aids" were coded.
A third turned steering wheel position into a trajectory demand (using ground speed, lateral acceleration & yaw rate). We felt the last was a brilliant addition (you just turned the steering wheel & let the system sort out the trajectory) but, as I said earlier, Senna hated it. .
Tommy Cookers wrote:This sounds most interesting, please could we have more on this feature ?
WilO wrote:Some interesting reading can be found here:
DaveW wrote:Tommy Cookers wrote:This sounds most interesting, please could we have more on this feature ?
The algorithm, which was devised by Peter Wright & developed by Steve Green, was based on the idea that warp load (Woff) controlled the lateral balance of the vehicle. In the USA the phenomenon is known as "weight jacking", I believe.
The algorithm, which included some bells & whistles, used r/V (yaw rate per unit velocity) as measure of track and Tan(steer angle) as a measure of track demand. Then,
Woff was controlled as a function of ny*r*V[tan(beta) - K*r/V].
ny was lateral acceleration, and K was a geometery function. tan(beta) was measured steer angle. Positive Woff moves balance towards oversteer.
The algorithm can be observed in action in the video I posted a while ago - here it is again. Note the trajectory of the active car during the slalom clips. The initial oversteer gets the trajectory estabished early, and the later move towards understeer stabilises the turn. A similar effect can be achieved passively by the intelligent use of damping...
WilO wrote:When you have a moment, could you expand on the use of damping to achieve an effect similar to that of the demand/trajectory system? I have a theory, (linear rear damping, digressive in bump at the front?), but your post included the word 'intelligent' in it, which excludes my participation, I'm afraid.
Smokes wrote:Can you run active suspension from a smart phone ...?
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