Optimization of the stator of a rod shape ultrasonic motor using bending modes
In order to improve the performances of the ultrasonic motor developed by authors,a finite element (FE) optimization design of the stator is developed,which is an efficient way to meet the design requirements.First,a parametrization of the stator is carried out.Then,in order to reduce the number of design variables and their variation ranges,sensitivity analysis of stators modes is performed.The rotational speed coefficient of the motor,as one of important parameters of motor output performances,is selected as the objective functions.Zero-order optimization method is chosen as the basic tool of structural updating of the stator.The optimization results show that the rotational speed of the optimum structure is 44.8% more than that of the initial structure.Moreover,the optimization method can improve the design efficiency of the motor.A prototype motor is manufactured using the optimized results.The optimized motor,20 mm in diameter,has shown some advantages such as high rotational speed (206r/min)and large torque (0.258 N.m ).
Ultrasonic motor Stator Finite element Modal analysis Optimization design
Jiantao Zhang Hua Zhu Chunsheng Zhao
Precision Driving Laboratory,Nanjing University of Aeronautics & Astronautics,Nanjing 210016,China
国际会议
南京
英文
335-343
2007-09-09（万方平台首次上网日期，不代表论文的发表时间）