Patent ID: 8113050
Filing Date: 2012-02-14
Classification: G01C,G01P,Y10T

Abstract:
1. An apparatus with six degrees of freedom and driven in anti-phase for passive relaxation of sense mode phase matching requirements comprising: a first and second three degree-of-freedom (3-DOF) subsystem coupled with each other in a drive-mode and driven into anti-phase oscillation to substantially reject common-mode stimuli, where each of the first and second 3-DOF subsystems comprise two proof masses and a decoupling frame, the two proof masses in each 3-DOF subsystem being collectively arranged and configured to function as both a 1-DOF drive oscillator and 2-DOF sense oscillator, where in each of the first and second 3-DOF subsystems the 1-DOF drive oscillator and 2-DOF sense oscillator are mechanically decoupled from each other and a substrate via the decoupling frame, where the two 1-DOF drive oscillators in the first and second 3-DOF subsystems are coupled with each other to collectively function as a 2-DOF coupled system and to provide a common anti-phase drive-mode resonant frequency at which the first and second 3-DOF subsystems oscillate in opposite directions, and where the two 2-DOF sense-mode oscillators in the first and second 3-DOF subsystems each provide a flat range in frequency response where the response gain and phase are stable to provide robustness to imperfections and environmental influences, and to provide matching of sense-mode amplitude and phase of the first and second 3-DOF subsystems.