The Gaborexpansionbased time frequency filtering is employed to process measured signals before conducting parameter identification. With Gabor expansion, the local characteristics of a signal can be shown in the timefrequency domain, according to which the properties of responses are acquired and the response signals can be filtered by elimination or interception. This technique can be applied to both stationary and nonstationary signals. Attribute to this technique, more information about the signals and systems can be gained, such as the distribution of natural frequencies, energy assemble functions, quantity of properties contents in each channel.

A micro-vibration testing platform with symmetrically placed electromagnetic actuators for the control of micro-vibration is presented. At first, a mathematical model of the micro-vibration platform is established for the simulation of micro-vibration control with an adaptive method. Then, an experiment is conducted to verify the control effectiveness. Both the simulation and the experiment demonstrate that the micro-vibration of the platform can be suppressed.