The Output Characteristics Simulation Analysis of Helicopter ACF Smart Rotor Piezoelectric Stack
Piezoelectric stack is the moving element of the trailing-edge flaps in the ACF smart ro-tor,and its output characteristics is directly affecting the deflection efficiency.The piezoelectric stack of full electrode and fork finger electrode was parametric modeled based on COMSOL Mul-tiphysics,the simulation analysis of the two typical output characteristics of the free displacement and blocking force was carried out,and the results were verified by theory.The results showed that the finite element model has good accuracy,the calculation results were basically consistent with the theoretical model calculation,the output characteristics of the two configurations of the piezoelectric stack were linearly dependent on the change in the excitation voltage,under the same excitation volt-age,the free displacement of the fork finger electrode stack was less than the full electrode type,and the proportion of the reduction was consistent with the reduction of the area of the ceramic layer.In addition,the blocking force of the two configurations was quite large,the blocking force was not reduced by the size of the electrode.
smart rotorpiezoelectric stackfinite element simulationparameterized modelingoutput characteristics
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