Mass unbalance modulation pickoff attenuation and speed control

Details Mass unbalance modulation pickoff attenuation and speed control Mass unbalance modulation pickoff attenuation and speed control

1974-06-19

1976-05-11

Myhre, Charles J.

Machine element or mechanism

Gyroscopes

With pick off

308 10, G01C 1928

Patent

active

039554260

ABSTRACT:
An improved electrostatic gyro system wherein, for each of the axes of suspension of a rotor, pickoff electronics are responsive to electrode pickoff signals for developing combined mass unbalance modulation (MUM) and servo signals from which a MUM signal reconstruction circuit demodulates and reconstructs only the MUM signal. The reconstructed MUM signal is then subtracted in servo suspension electronics from the combined MUM and servo signals to substantially develop only the servo signal containing only rotor displacement information. This servo signal is then fed to a servo network which does not require a notch filter. The output of the servo network is then developed into force signals to enable an associated pair of plate charge amplifiers to electrostatically suspend the rotor properly between an associated pair of electrodes. In addition, the reconstructed MUM signals are utilized by speed control electronics to develop and add highly accurate and precise speed control signals to the output of the servo network to provide a very precise speed control of the rotor without the use of any notch filter.

REFERENCES:
patent: 3262325 (1966-07-01), Senstad
patent: 3412618 (1968-11-01), Staats
patent: 3469457 (1969-09-01), Staats
patent: 3482455 (1969-12-01), Boltinghouse et al.
patent: 3742767 (1973-07-01), Bernard et al.
patent: 3785709 (1974-01-01), Atkinson
patent: 3847026 (1974-11-01), Boltinghouse et al.

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