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Tiny rotary traveling wave ultrasonic motor design and performance analysis

Author: ChenRuHuan
Tutor: ChenChao
School: Nanjing University of Aeronautics and Astronautics
Course: Engineering Mechanics
Keywords: Micro Ultrasonic Motor Structural Design Optimization Performance Analysis Experimental Analysis
CLC: TM359.9
Type: Master's thesis
Year: 2011
Downloads: 87
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Abstract


This topic is in the National Natural Science Foundation of China (50975135 and 10604032) and Nanjing University of Aeronautics and Youth Science and Technology Innovation Fund (NS2010001) regarding funding for micro and small ultrasonic motor technology. This paper focuses on tiny rotary traveling wave ultrasonic motor design this theme, the stator electromechanical coupling dynamic model, the contact interface, and a power transmission mechanism aspects of the study, proposed to describe the load characteristics of the motor good representation methods and design indicators, and experimental study carried out. Main contents and research results are summarized as follows: 1. Analysis of piezoelectric ceramic achieved by inducing strain energy to mechanical energy into the working mechanism, elaborated stimulate tiny rotary traveling wave traveling wave ultrasonic motor stators necessary condition for generating line analysis of the stator wave after its top surface elliptical trajectory; 2. establish a small rotary traveling wave ultrasonic motor stator electromechanical coupling dynamic model of the contact interface and the analysis on the basis of the power transmission mechanism got the whole tiny rotary motor model, for further analysis and design of the motor foundation; 3. using the established small rotary traveling wave ultrasonic motor model, analyzes its power transmission and output characteristics, proposed on the basis of a good motor load characteristics can describe the methods and indicators, the structural design of the motor to provide useful guidance; 4 with micro rotary traveling wave ultrasonic motor stator axial amplitude, velocity factor and amplitude ratio of the axial and radial design optimization objectives, the use of parameterized finite element model were optimized to meet the performance requirements of different ways to provide design; 5. built based on photoelectric encoder and NI acquisition system consisting of transient characteristics of ultrasonic motor test platform was tiny rotary traveling wave ultrasonic motor transient characteristics index, a kind of small motors on the mechanical characteristics of transient characteristics estimation method using micro force sensor also tested the motor at different friction materials, the pre-pressure and stiffness of the spring in case of different mechanical properties, design, and testing of the motor theoretical model is reasonable; 6 for small rotary traveling wave ultrasonic motor with high / low ambient temperature test, try to explain theoretically more than (electric heating) Coupling this type ultrasonic motor operating frequency drift, and output speed changes properties.

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