Root Cause Analysis of Rocking Modes in Nonlinear Domain

摘要

Rocking modes are caused by small imbalances in the distribution of stiffness, mass and force factor. A measurement technique to determine these root causes, using laser vibrometry, parameter identification and root causes analysis, has been presented in a previous paper. This paper focuses on the application of this technique to examine rocking modes in nonlinear domain. An incremental DC-offset is applied to the loudspeaker to examine changes of the root causes of the rocking throughout the working range of the loudspeaker.