Measuring and testing – Speed – velocity – or acceleration – Angular rate using gyroscopic or coriolis effect
Patent
1995-05-24
1997-02-18
Chilcot, Richard
Measuring and testing
Speed, velocity, or acceleration
Angular rate using gyroscopic or coriolis effect
735044, G01P 904
Patent
active
056043090
ABSTRACT:
Electronics for use in Coriolis and other sensors for reducing errors in the sensor output signal. An off-frequency drive scheme includes a frequency translation circuit in the excitation feedback loop of a sensor system to suppress components of the sensor drive signal at a predetermined frequency so that coupling of the drive signal to the sensor output signal can be readily removed by conventional filtering techniques. An amplifier circuit having a bandpass circuit in cascade with the forward loop gain is provided, with the bandpass circuit having a transfer function approximating one plus a bandpass characteristic, the passband of which corresponds to the information band. This arrangement increases the open-loop gain of the amplifier circuit around the information frequency without affecting the open-loop gain at DC and crossover so as to reduce phase and gain errors around the information frequency. A quadrature nulling system is provided for an in-plane micromechanical gyroscope. A signal having an in-phase component due to Coriolis induced out-of-plane motion and a quadrature component due to mechanical misalignments is mixed with a voltage in-phase with motor position. The mixer output is used to apply a DC potential to motor drive electrodes and is automatically adjusted by the integral compensator until the mixer output is zero, resulting in a nulled quadrature component.
REFERENCES:
patent: 4144764 (1979-03-01), Hartzell, Jr.
patent: 4293815 (1981-10-01), West et al.
patent: 4336718 (1982-06-01), Washburn
patent: 4345474 (1982-08-01), Deval
patent: 4566327 (1986-01-01), Rider
patent: 4569593 (1986-02-01), Auch et al.
patent: 4590801 (1986-05-01), Mehav
patent: 4606637 (1986-08-01), Geen
patent: 4616352 (1986-10-01), Sallas et al.
patent: 4637722 (1987-01-01), Kim
patent: 4674331 (1987-06-01), Watson
patent: 4884446 (1989-12-01), Ljung
patent: 4930351 (1990-06-01), Macy et al.
patent: 5018860 (1991-05-01), Bielas et al.
patent: 5094537 (1992-03-01), Karpinski, Jr.
patent: 5138883 (1992-08-01), Paquet et al.
patent: 5148236 (1992-09-01), Blake et al.
patent: 5182611 (1993-01-01), Bielas et al.
patent: 5187664 (1993-02-01), Yardley et al.
patent: 5205171 (1993-04-01), O'Brien et al.
patent: 5233351 (1993-08-01), Gregory et al.
patent: 5241861 (1993-09-01), Hulsing, II
patent: 5245347 (1993-09-01), Bonta et al.
patent: 5285686 (1994-02-01), Peters
patent: 5388458 (1995-02-01), Weinberg et al.
patent: 5392650 (1995-02-01), O'Brien et al.
patent: 5430342 (1995-07-01), Watson
patent: 5434467 (1995-07-01), Abe et al.
patent: 5488862 (1996-02-01), Neukermans et al.
Chilcot Richard
Noori Max H.
The Charles Stark Draper Laboratory Inc.
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