Frame assembly and dither drive for a coriolis rate sensor

Details Frame assembly and dither drive for a coriolis rate sensor Frame assembly and dither drive for a coriolis rate sensor

1988-07-26

1989-09-12

Tokar, Michael J.

Measuring and testing

Speed, velocity, or acceleration

Acceleration determination utilizing inertial element

G61P 1508

Patent

active

048648612

ABSTRACT:
An apparatus for producing signals indicative of both a Coriolis rate and an acceleration along a preferred axis while decoupling extraneous vibration and motion that would introduce errors into the signals, and a driving mechanism for vibrating the apparatus at a dither frequency. The apparatus includes a parallelogram frame (50) including two accelerometer support surfaces (24, 26) on which are mounted two accelerometers (20 and 22) having their sensitive axes in parallel alignment. A driving mechanism (64) is connected to the parallelogram frame and is operative to drive the accelerometers at a desired frequency, causing them to vibrate back and forth in a direction substantially transverse to their sensitive axes. The driving mechanism includes a mounting plate (72) and a coil frame (66) on which are mounted two electromagnetic coils (70) having a "C" shaped core (80). The driving mechanism is mounted so that the core faces a pole piece (84) attached to the parallelogram frame and its moment of inertia is trimmed to equal that of the parallelogram frame. It is connected to the parallelogram by a link (88) and provides a reactionless driving force.

REFERENCES:
patent: 4665748 (1987-05-01), Peters

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