As with any jet thread, a helo threadjack is in order...
You're conflating a couple of different systems. Sikorsky does a FBW -60, but that's different than what Pags already mentioned, which is a digital AFCS and a coupler. The Army (I think it's their Mikes) have a coupler slaved to their avionics, so the digital AFCS receives input from the nav needles and imparts an outer-loop control command to the mechanical controls. This is the same idea as the R/S coupled approach, it's just comparing the data against a table rather than a nav signal. The helo I fly now has a 2-axis coupler as well, and makes flying an approach super-easy, which is the whole point under SPIFR flying.
But, as was said earlier, that's all different than with PLM, which is changing the shape of the wing mechanically via FBW control input being fed from the brain. Although I guess you could say a helo does it's thing by always changing the shape its "wing," but it's doing that with power, as well.