Parameter estimation from nonlinear frequency response of MEMS resonators

Abstract : This paper deals with parameter extraction from nonlinear frequency responses of resonant systems. We show that nonlinear frequency responses can be exploited to identify not only the Q-factor and the natural frequency of a resonator, but also information about its internal structure. The proposed method requires less demanding measurements and is less model-dependent than the existing state-of-the-art methods. Its accuracy is illustrated with simulations and it is experimentally validated on a capacitive MEMS resonator