Our focus today is on ‘perfect pitch’ for ‘vehicle dynamics’. This ‘art’ is beyond the ‘science’ of classical mechanics engineering. A life dedicated to vehicle dynamics compressed in a few hours is a challenge. A number of steps, which may have new views, will take us to the physical foundation to be assessed in the Audi car with S2AB 5 link IRS.

The assessment will be with capacity of ‘feel’, which has a dynamic bandwidth ‘faster than thought’. The closed loop control of ‘perfect pitch’ has to be made in the ‘short duration of the moment of the present’! ‘Detailed definition’ of new or modified concepts to better dynamics has an infinite number of possible choices. Managing operative ‘refined tuning’ should not be based on trial and error but on certain ’important principles’.