MEMS accelerometer simulations in Matlab/SIMULINK and COMSOL Multiphysics

In this paper modelling and simulation of MEMS accelerometers in Matlab/SIMULINK environment are presented. Results of simulations of three different approaches: mathematical, electrical equivalent and physical models are compared with FEM accelerometer model created in COMSOL software. Results of simulations are analyzed for displacement response for two of the most popular spring geometries - folded and straight. Author takes into consideration crucial aspects of damping coefficients influence on accelerometer performance.