Ifo,
Indeed early A320s had 'active ailerons' in much the same way that 411A has described for the L1011-500.
In later models they were deleted, since I was told that the wing had been 'beefed' up. Certainly the 321s never had this system.
In Airbus 'speak' it was called LAF for 'load alleviation function' and worked very much as the L1011's sytem did by moving both ailerons together up or down when a gust was sensed to be loading the wing, effectively suppressing or damping out the bending moments on the wing and thus allowing a lighter weight structure to carry heavier weight.
Interestingly on the L1011, the CAA approach to the system was very different to that of the FAA.
During flight testing for CAA certification it was found that in a jet upset type scenario the ACS (as it was called on the tri-motor) would effectively be 'adding' to the elevator up and would cause the a/c to increase the pitch up and thus exacerbate the situation. This was a result of the very short fuselage for the -500 variant that put the extended wingtips almost at the same longitudinal position as the stabiliser.
The fix was to change the ACS schedule and also to fit an extra device called recovery speed brake (RSB) which sensed the onset of this phenomenon and deployed almost full speed brake to kill the lift on the wing....very dramatic!
