8 September 1993 Feasibility study to build a smart rotor: induced-strain actuation of airfoil twisting using piezoceramic crystals
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Abstract
The objective of this research is to develop a dynamically-scaled helicopter rotor blade with embedded piezoceramic elements as sensors and actuators to control blade vibrations. A 6 ft diameter 2-bladed Froude-scale bearingless rotor model is built where each blade is embedded with banks of specially-shaped piezoelectric crystals at +/- 45 degree angles on the top and bottom surfaces. A twist distribution along the blade span is achieved through in-phase excitation of the top and bottom crystals at equal potentials. The non-rotating static torsional response of the piezoceramic blade is experimentally determined and then correlated with the prediction by theory.
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Peter C. Chen, Peter C. Chen, Inderjit Chopra, Inderjit Chopra, } "Feasibility study to build a smart rotor: induced-strain actuation of airfoil twisting using piezoceramic crystals", Proc. SPIE 1917, Smart Structures and Materials 1993: Smart Structures and Intelligent Systems, (8 September 1993); doi: 10.1117/12.152763; https://doi.org/10.1117/12.152763
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