Resonance-free vibration isolator of model GWF dissipates vibrating energy by means of Coulomb-damping and elastic deformation, and it is widely used in vibration isolation for electronic equipment due to no harmonic peaks. Based on analysis of theoretical model, the unlock frequency and vibration isolation transmissibility for the GWF vibration isolator were obtained, the correctness of the theory was verified and an experimental and theory basis for selecting appropriate stiffness and friction force were provided.

The phenomenon of irregular wave output of crystal oscillator in the random vibration test is studied in this paper. Using the resonance free technique and the knowledge of flat spring, the dimensions of the flat spring are determined; the flat spring is installed and tested; and the problems in the testing is resolved.