System for measuring the position of vibrating object

Details System for measuring the position of vibrating object System for measuring the position of vibrating object

1987-10-26

1989-12-19

Lall, Parshotam S.

Boots, shoes, and leggings

356350, G01C 1964

Patent

active

048887056

ABSTRACT:
A system for measuring the position of a vibrating object relative to a reference point, such as the block of a ring-laser gyroscope relative to its case, uses a continuous velocity sensor that is noisy and subject to drift and a precise position crossing detector. A mixer-filter combines the data from the two sensors so that the capability of the velocity sensor to provide a continuous reading of position is exploited to interpolate data between the instants that the position crossing detector indicates that the object position crosses through zero. The mixer-filter is implemented in the form of an extended Kalman filter which operates upon the inputs to provide an optimum estimate of the position of the vibrating object.

REFERENCES:
patent: 4132482 (1979-01-01), Friedland
patent: 4243324 (1981-01-01), Friedland
patent: 4248534 (1981-02-01), Elbert
patent: 4456376 (1984-06-01), Carrington et al.
patent: 4610543 (1986-09-01), Ferriss
patent: 4740084 (1988-04-01), Curby et al.

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