A high-specific output, moving magnet actuator topology suitable for active vibration control in a helicopter rotor blade is presented. Within the constraints imposed by the potential application the electromagnetic design is optimised for minimum weight using parametric 2D finite-element field analyses coupled to a particle swarm optimisation. A particular attribute is that the pole shape has been optimised to ensure that restoring magnetic forces act on the effector at zero current. A mathematical model is developed to study the dynamic performance of the device. A prototype was constructed from cobalt iron laminates and high-energy product permanent magnets and is used to validate the design. Tests undertaken on this prototype demonstrate a bidirectional-specific force and work capability of 320 N/kg and 0.26 J/kg, respectively, metrics which compare favourably with piezoelectric alternatives proposed for rotorcraft active vibration control.


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    Title :

    High-specific output bidirectional moving magnet actuator for use in active vibration control of rotorcraft


    Contributors:

    Published in:

    Publication date :

    2011


    Size :

    11 Seiten, 16 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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