​​ICIICII 2020

​​The Fourth International Conference on Industrial Informatics - Computing Technology, Intelligent Technology, Industrial Information Integration 

Shantou, China  

December 18-19, 2020

Invited Speech

​​

Local landscape

​​

Co-sponsors

Jiang Wu, PhD，Associate Professor


Hebei University of Technology



Title: Can functional materials enhance the practicality of ultrasonic motors? A trial investigation.



Abstract
    Ultrasonic motors convert electrical energy into kinetic energy on the basis of inverse piezoelectric effect and achieve actuation via frictional force. Compared to electromagnetic motors, they exhibit quick response, self-locking at the power-off state, and absence of electromagnetic radiation. Recently, ultrasonic motors with lightweight have become increasingly required in the fields of robotics and precision machines. To reduce the weight of ultrasonic motors, two methods, namely usage of functional materials and structural design of triple-layered transducers, were exploited in our previous studies. 
     First, it is known that polymers exhibit low density but high attenuation for ultrasounds. However, it is interesting to find that poly phenylene sulfide is capable of providing far lower attenuation than commonly-used polymeric materials; this property implies the potential applicability of poly phenylene sulfide as the vibrating materials of ultrasonic motors. Through experimental investigation, we found that the weight was 0.3 times lower for the poly phenylene sulfide-based than for the aluminum-based ultrasonic motor when they had identical structures and provided approximately the same output power. This result verifies that using polymer vibrating bodies is an effective approach to decrease ultrasonic motors’ weights. 
     Second, to obtain sufficiently high stiffness, the thickness should be satisfactorily large for ultrasonic motors; this problem obstructs the reduction in weight. To tackle this problem, a triple-layered transducer; incorporating a fine-ceramic layer, a metallic layer, and a piezoelectric-ceramic layer; was devised to drive ultrasonic motors. Here, owing to the high elastic modulus, the fine-ceramic layer can greatly increase the stiffness despite its low thickness. The metallic layer is utilized as the surface in contact with the rotor because it has good workability. The entire transducer is excited with the piezoelectric-ceramic layer. The experimental result shows that, using this transducer, the ultrasonic motor’s weight is decreased to 0.4 times of its original weight; this indicates the feasibility of weight reduction through structural design. 
      To sum up, two approaches to reduce ultrasonic motors’ weights were developed and their effectiveness was experimentally validated. Meanwhile, this study provides a new way for weight reduction and would contribute to improving the practicality of ultrasonic motors. 

Biography
     Jiang Wu was born in Liaoning, China, on January 29, 1988. He received the B.E. degree in mechanical engineering from Dalian University of Technology (China) in 2010, the M.E. degree in mechatronic engineering from the State Key Laboratory of Robotics and System, Harbin Institute of Technology (China) in 2012, and Dr. Eng. Degree in electrical and electronic engineering from the Future Interdisciplinary Research of Science and Technology, Tokyo Institute of Technology (Japan) in 2017. He is currently working in Hebei University of Technology. His research interests include piezoresistive and piezoelectric materials, permanent magnetic-based sensing technology, polymer-based ultrasonic transducers and actuators, and artificial muscle. 
  Dr. Wu is a member of IEEE and the Acoustic Society of Japan. He had been a winner of Japanese Government Scholarship since 2012. From 2017 to 2019, he was a Research Fellow of the Japan Society for the Promotion of Science (JSPS). As the first author, he owns >10 scientific papers, published in IEEE Transactions on Industrial Electronics, IEEE/ASME Transactions on Mechatronics, IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, etc. 
  • The bird's-eye view of Shantou University
  • Nan’ao  Island
  • Nan'ao Bridge
  • Zhongshan Pavilion
  • Shantou Coastal Corridor
  • Lotus Pond
  • Gentleman Sculpture Group
Menglun Tao, PhD, Associate Professor


School of Logistics Engineering, Wuhan Univerisity of Technology, P.R. China     



Title: Smart materials and actuators for ultrasonic assisted machining 

         and micro/nano positioning



Abstract
      Smart materials can transform magnetic, electric and thermal energy into mechanical energy, which is based on varied physical effects within the materials, such as magnetic-mechanical materials (magnetostrictive effect), electric-mechanical materials (piezoelectric effect), thermal-mechanical materials (shape memory effect) and so on, showing very broad applications in actuators (micro/nano positioning) and transducers (sensors and ultrasonic devices). Here two applications will be introduced related with smart materials and actuators. First case is the deep hole with small diameter on hard materials machined by EDM which is assisted by ulrasonic devices, showing the process with high efficiency and surface quality. Another one shows a specific micro/nano positioning device cosisted with two smart actuators combined with multifuctional compliant mechnism. Compared with traditional actuators, smart actuators show extraordinary characteristics in some specific applications.

Biography
      Menglun Tao got his PhD degree from Wuhan Univerisity of Technology in Mechanical Engineering, with two years’ study (supported by China Scholarship Council) at The Pennsylvania State Univeristy, USA. He has worked extensively for many years in the areas of smart materials, structures and devices and their applications in micro/nano positioning, ultrasonic assisted machining and with many pulications related with these areas.
Previous
Next
Last
First