Originally Posted by
Rainboe
The way the system knows there is an incipient skid is to actually compare wheel speed, or pair of wheels speed in some systems, with other wheels on the bogie or other undercarriage leg, and repeatedly back off braking until the speed difference is zero. No fancy computer decceleration models are used, or input from INS groundspeed.
I over simplified the function of anti-skid and there
is more to it than a locked wheel function and systems vary by manufacturer. Rainboe, you are correctly referring to paired wheel monitoring which can also be used as an control criteria.
Some Airbus systems
do use an ADIRU input to calculate a target wheel speed and will keep the wheels spinning above a certain percentage of that rate. (Computer model method) Deceleration is limited to a predetermined value.
