关键词: EDB, 微米单颗粒, 振荡特性, 运动轨迹, 数值模拟

Abstract: Based on the two-regime theory of Davis, a complete motion differential equation for a single oscillating microparticle in an electrodynamic balance (EDB) has been put forward by introducing Oseen’s formula and inhomogeneous term and solved numerically by using the classic Runge-Kutta method in this paper. The fact that there exists a transitional regime, in which the charged particle can be in steady damped oscillation, has firstly been demonstrated by theoretical method. By virtue of the simulated trajectories, a three-regime state curve (δ-β), which is different from Davis theory, has been delineated and the theoretical foundation of EDB research on microparticle oscillation has further been built up.And the above-mentioned theoretical results have been verified experimentally hereby.

Key words: EDB, 微米单颗粒, 振荡特性, 运动轨迹, 数值模拟