Research On Longitudinal Bending Mode Four Cantilever Composite Transducer For Traveling Wave Ultrasonic Motor

Ultrasonic motor is a high-tech motor based on piezoelectric effect and ultrasonic vibration.Ultrasonic motor has a large torque,low speed,flexible design,simple structure,power self-locking,faster response and no electromagnetic interference and other characteristics of the new motor.In order to widen the field of ultrasonic motors,increase the torque of the ultrasonic motor to achieve the robot or high-precision equipment platform,such as the direction of the direct drive.Based on the above requirements,I have chosen the cantilever longitudinal bending compound transducer traveling wave ultrasonic motor as the object,proposed a four cantilever longitudinal bending compound transducer type ultrasonic motor,by increasing the number of cantilever transducer to achieve the increase The purpose of the moment.The main work of this paper is as follows:(1)In this paper,the performance parameters of metal materials and piezoelectric materials are introduced.According to different attribute types,different piezoelectric equations are analyzed,and the position of piezoelectric ceramics is designed from the basic vibration mode.Moreover,the scheme of longitudinal cantilever cantilever structure is analyzed,which provides a theoretical basis for principle analysis and modal simplification.(2)A new type of cantilever structure is formed on the structure,and the coupling effect of the whole working process is greatly reduced and the damping performance is good.From the working trajectory of the motor,the operation mode is expanded and the concrete operation trajectory around the vertical and horizontal axis is combined with the specific parameter index,the equation operation is carried out,the feasibility and reliability of the test theory are carried out.(3)The structure of the main body transducer of ultrasonic motor structure is constructed,and the cantilever beam transducer and cylinder of the driver are designed by finite element method to realize the modal degeneration of the two.The finite element analysis of the whole of the actuator is carried out to adjust and obtain the final size parameters of the transducer and the cylinder.Through the analysis of the finite element model,it is concluded that the motor stator driver reaches the maximum at 21288 hz and resonates.Through the transient analysis of the particles on the stator driver,it is concluded that the stator driver can drive the X0 Y direction motion and the particle displacement is increased by 3 times,thus proving the feasibility and validity of the proposed motor.(4)On the basis of the processing prototype,around the experimental test situation started,obtained in the 200 volts under the effect of the standard voltage,the operating frequency of about22188 Hz,this time,the motor speed to reach the maximum,190 r / min,the largest The torque output of the drive shaft is 0.9 N · m,which achieves high speed and large thrust.