Effects of ramp vibrational states on flexural intrinsic vibrations inBesocke-style scanners  

作　　者：张辉 蒋国珠 刘朝群 张淑仪 范理 

机构地区：[1]Laboratory of Modern Acoustics,Institute of Acoustics,Nanjing University

出　　处：《Chinese Physics B》2013年第6期591-595,共5页中国物理B（英文版）

基　　金：supported by the National Basic Research Program of China (Grant No. 2012CB921504);the National Natural Science Foundation of China (Grant Nos. 11004099,1174142,and 11274169);the Natural Science Foundation of Jiangsu Province of China (Grant No. BK2012721);the Fundamental Research Funds for the Central Universities (Grant No. 1126020435);the Priority Academic Program Development of Jiangsu Higher Education Institutions

摘　　要：For both the vibrating and steady supporting surfaces of a scanning disk in a Besocke-style piezoelectric scanner, a theoretical model is given by considering the nonlinear lateral friction at the micro-contact interface between the positioning legs and the supporting surface. Numerical simulations demonstrate that unexpected flexural vibrations can arise from a vibrating ramp, and their frequencies are lower than the eigenfrequencies of the scanner in the linearly elastic regime. The vibrations essentially depend on 1） the vibrational states of the supporting ramp and the steel ball tips on the three piezo- electric positioning legs, and 2） the tribological characteristics of the contacts between the tips and the ramp. The results give an insight into the intrinsic vibrations of the scanners, and are applicable in designing and optimizing piezoelectric scanning systems.For both the vibrating and steady supporting surfaces of a scanning disk in a Besocke-style piezoelectric scanner, a theoretical model is given by considering the nonlinear lateral friction at the micro-contact interface between the positioning legs and the supporting surface. Numerical simulations demonstrate that unexpected flexural vibrations can arise from a vibrating ramp, and their frequencies are lower than the eigenfrequencies of the scanner in the linearly elastic regime. The vibrations essentially depend on 1） the vibrational states of the supporting ramp and the steel ball tips on the three piezo- electric positioning legs, and 2） the tribological characteristics of the contacts between the tips and the ramp. The results give an insight into the intrinsic vibrations of the scanners, and are applicable in designing and optimizing piezoelectric scanning systems.

关 键 词：Besocke-style scanner stick-slip behavior flexural vibration Timoshenko beam theory 

分 类 号：TP334.22[自动化与计算机技术—计算机系统结构]