Research On Active Twist Rotor Based On MFC

The smart rotor technology is of great significance in reducing the vibration level of helicopters.Therefore,it has become a research hotspot in recent years and has attracted much attention.The technology of smart rotor is based on the piezoelectric effect of smart material driving components to control the blade actively.The driving components used are especially important.MFC as a new type of driving component has the characteristics of small size,light weight and fast response,etc.Features,in the application of intelligent rotor technology,it has broad prospects.In this context,theoretical analysis,simulation,experimental research and other methods are used to design and optimize the intelligent rotor structure using the Macro-Fiber Composites Actuator component.The specific work is as follows:(1)Exploring the piezoelectric effect mechanism and piezoelectric equation,modeling and simulating the piezoelectric fiber driver MFC,analyzing the composition of the piezoelectric material and the structural size of the piezoelectric element(polymer layer thickness,branch electrode center distance,branch electrode width,fiber spacing,fiber cross-sectional size,etc.)on the drive performance of the component.(2)Combining the requirements of a helicopter rotor,establish a rotor blade model based on MFC drive,and use the finite element method to study the relationship between the torsion angle of the blade and the MFC driving voltage,MFC quantity and MFC layout under different load conditions;The layout of the MFC in the structure was optimized and the intelligent rotor blade model was redesigned,so that the torsion Angle of the blade model increased by about 3.11 times under the same driving condition.(3)Set up an experimental test platform,and use the simplified experimental model to study the influence of MFC driving voltage on the torsion angle of the structure tip,and compare it with the simulation data.It was found that the torsion Angle of the structure increased with the increase of driving voltage,and the simulation data had a good consistency with the experimental results.