System for suppressing vibration in turbomachine components

A system for suppressing vibrations in at least one fan blade of a turbomachine also having a rotor hub, and being located near a stationary unit, said system comprising:

• a) at least one actuator having an input and located on at least one fan blade, said input receiving a signal which causes deformation of said actuator;
• b) at least one sensor having an input and an output and located on said at least one fan blade and generating a signal representative of the vibrations occurring on said at least one fan blade, said output of said sensor providing a signal representative of said vibrations;
• c) at least one analog to digital converter located on said rotor hub and receiving said output of said at least one sensor and providing a digital output signal representative thereof;
• d) a capacitive plate coupler having first and second stages spaced apart by a first predetermined distance with the first stage being located on said rotor hub and the second stage being located on said stationary unit, said first stage having an input and an output and said second stage having an input and an output, said capacitive plate coupler having its first stage input receiving said output of said at least one analog to digital converter and providing a representative signal thereof at its output of its first stage;
• e) at least one digital to analog converter located on said stationary unit and receiving said output of said first stage of said capacitive plate coupler;
• f) a processor having operating routines for suppressing vibrations in said at least one fan blade, said processor further having an input and an output, said input of said processor receiving said output of said at least one digital to analog converter located on said stationary unit, said operating routines of said processor providing an output signal to suppress the vibrations of said at least one fan blade;
• g) at least one analog to digital converter located on said stationary unit and receiving said output signal of said processor and providing a representative output therefrom that is routed to the input of said second stage of said capacitive plate coupler and providing a representative signal thereof at its output of its second stage;
• h) at least one digital to analog converter located on said rotor hub and receiving said output at said second stage of said capacitive plate coupler and providing a representative output thereof that is routed to said input of said at least one actuator located on said fan blade and causing said deformation of said actuator;
• i) a power supply located on said stationary unit and having at least one output;
• and
• j) an inductive power transfer apparatus having first and second stages with the first stage thereof located at said stationary unit and the second stage thereof located at said rotor hub, said first and second stages being spaced apart by said first predetermined distance, said first stage of said inductive power transfer element being connected to said output of said power supply and providing a representative output thereof at the second stage of said inductive power transfer element, said second stage being connected to power supplies located on said rotor hub.