PC-12
Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Less Severe
Flight Crew Landed As Precaution; Flight Crew Returned To Departure Airport
Aircraft
Tested pusher system on the ground and it tested fine.  Rotated at 80 knots and about 3 seconds later/30 to 40 feet above the ground the shaker system activated and we noticed the AOA indication was very active (going full fast to full slow at odd intervals and there was not much wind).  At this point the First Officer was flying from the right seat and she kept the pusher interrupt switch activated and we made right traffic to come back around to land.  Once we were on downwind the First Officer handed the plane over to me.  At this point the shaker is still going off.  It stopped for 1-2 seconds and would return (it did that about 3 times).  The pusher CAWS kept coming and going on its own throughout the rest of the flight as well.  I continued flying with the pusher interrupt switched activated.  We landed with the shaker going off with no further problems.  Also noticed yesterday that the pusher CAWS activated in flight for about 1 second but cleared itself. All ground pusher tests have been successful.
PC-12 Captain reported stick shaker activation just after takeoff possibly related to AOA anomalies.