扬声器低频弱非线性系统的周期振动分析

Periodic Vibration Analysis of Low Frequency Weak Nonlinear System for Loudspeaker

同时具有恢复力和磁场力的恒压源驱动扬声器非线性系统的动力行为极其复杂.利用多尺度扰动理论对扬声器弱非线性振动系统的周期振动进行数值分析,得出了周期振动的稳定性以及幅频之间的关系.结果表明,只要磁场驱动力存在,调节相应的系数,均可以得到稳定的周期解.

The dynamics of nonlinear systems for loudspeaker driving by constant voltage power supply with both restoring force and magnetic force are complicate.Using multi-scale perturbation theory,investigates the periodic vibrations of a weak nonlinear vibration system of loudspeaker,and obtains the stability of periodic vibration and relationship between amplitude and frequency.The result shows that it can obtain the stable periodic solution of the nonlinear system with magnetic force by adjusting the parameters.