Patent ID: 8271149
Filing Date: 2012-09-18
Classification: B64C

Abstract:
1. A method for preventing a pylon difference between a first position of a first pylon and a second position of a second pylon by monitoring a first command difference between the first position and a commanded first position of the first pylon and a second command difference between the second position and a commanded second position of the second pylon, wherein the first pylon and the second pylon are located at either end of a wing of a tiltrotor aircraft, comprising: calculating, using a first calculating unit, a first actuator position error for the first pylon from the first command difference; calculating, using a second calculating unit, a second actuator position error for the second pylon from the second command difference; comparing, using a first comparator, a first absolute value of the first actuator position error to a first preset limit; and if the first absolute value is greater than or equal to the first preset limit, switching, using a switching unit, an input of the second calculating unit so as to calculate the second actuator position error from the pylon difference.