Abstract:
A balanced angular accelerometer (10;110) is provided having a substrate (60), a fixed electrode (20A) with a plurality of fixed capacitive plates (24), and a rotational inertia mass (12) with a central opening (13) and substantially suspended over a cavity (34) and including a plurality of movable capacitive plates (14) arranged to provide a capacitive coupling with the first plurality of fixed capacitive plates (24). The accelerometer (10) has a central member (15) and an outer member (18) fixed to the substrate (60). According to one embodiment, a plurality of inner support arms (16A-16D) extend between the central member (15) and the inertia mass (12) and a plurality of outer support arms (40A-40D) extend between the inertia mass (12) and the outer member (18) to support the mass (12) over the cavity (34).
Abstract:
A balanced angular accelerometer (10 or 110) is provided having a substrate (60), a fixed electrode (20A) with a plurality of fixed capacitive plates (24), and a rotational inertia mass (12) with a central opening (13) and substantially suspended over a cavity (34) and including a plurality of movable capacitive plates (14) arranged to provide a capacitive coupling with the first plurality of fixed capacitive plates (24). The accelerometer (10) has a central member (15) and an outer member (18) fixed to the substrate (60). According to one embodiment, a plurality of inner support arms (16A-16D) extend between the central member (15) and the inertia mass (12) and a plurality of outer support arms (40A-40D) extend between the inertia mass (12) and the outer member (18) to support the mass (12) over the cavity (34). According to another embodiment, one or more cut out apertures (150) are formed in the inertia mass (112) to compensate for a channel (141) and signal line (140) so as to balance the inertia mass (112) about the center of the inertia mass (112).
Abstract:
A balanced angular accelerometer (10 or 110) is provided having a substrate (60), a fixed electrode (20A) with a plurality of fixed capacitive plates (24), and a rotational inertia mass (12) with a central opening (13) and substantially suspended over a cavity (34) and including a plurality of movable capacitive plates (14) arranged to provide a capacitive coupling with the first plurality of fixed capacitive plates (24). The accelerometer (10) has a central member (15) and an outer member (18) fixed to the substrate (60). According to one embodiment, a plurality of inner support arms (16A-16D) extend between the central member (15) and the inertia mass (12) and a plurality of outer support arms (40A-40D) extend between the inertia mass (12) and the outer member (18) to support the mass (12) over the cavity (34). According to another embodiment, one or more cut out apertures (150) are formed in the inertia mass (112) to compensate for a channel (141) and signal line (140) so as to balance the inertia mass (112) about the center of the inertia mass (112).