DYNAMIC NOTCH FILTERING CONTROL FOR FAULT-TOLERANT ACTUATORS OF FLY-BY-WIRE HELICOPTERS

摘要

The paper deals with the control design of afault-tolerant actuator for fly-by-wirehelicopters, capable of compensating bothfailure effects and jump resonance phenomena.The study, focused on the performanceanalysis in case of servovalve coil faults, pointsout that a standard reconfiguration based ondemand amplification can imply jumpresonances. The proposed strategy eliminatesthe problem by correlating the jump frequencyto the system characteristics, and by inserting adynamic notch filter in the actuator closed-loopcontrol.