Decoupled microgyros and the design principle DAVED

This paper reports the surface micromachined gyroscopes realized by HSG-IMIT according to the patented decoupling principle DAVED (DECOUPLED ANGULAR VELOCITY DETECTOR). The DAVED prototypes show a rms noise below 0.05/sup o///sub s/ and a bias stability of /spl plusmn/2.5 /sup o///sub s/ over the temperature range and thus meet the target specification comparable to ESP requirements. Further, a novel and advanced concept is presented which can be viewed as a doubly decoupling scheme. The goal of decoupling is to reduce the so-called quadrature signal and thus improve the sensor performance, especially, the temperature sensitivity. This advancement will be necessary to meet the demands of future applications, like, ADASs (Advanced Driver Assistance System) or partially replace fiber optic gyroscopes, for example, within autonomous guided vehicles.