Angular position sensing and control system, apparatus and metho

Details Angular position sensing and control system, apparatus and metho Angular position sensing and control system, apparatus and metho

1975-03-10

1976-08-17

Gill, James J.

Measuring and testing

Miscellaneous

33328, 73510, G01C 900, G01C 908

Patent

active

039746992

ABSTRACT:
A structural body is monitored in angular position about at least one axis by utilizing a level sensor and a sensor responsive to angular motion of the body about the axis being monitored. An output indicative of long term angular variations of the body about the axis is provided by the level sensor and short term angular variations are indicated by the output from the sensor responsive to angular motion about the axis. The signals indicative of long term and short term angular variations are combined to provide a broad band output signal indicative of angular position which is immune to high frequency translational variations appearing at the level sensor output, but which is responsive to high frequency angular inputs. The fast response angular sensor output is compared with the slow response level sensor output and an error signal is produced which drives the angular sensor output signal into coincidence with the level sensor output signal. The combined broad band angular output indication may be utilized for angular position monitoring for controlling one part of a machine relative to a predetermined external angular position reference for driving a stable platform to assume a predetermined angle about the axis.

REFERENCES:
patent: 2892660 (1959-06-01), Reswick et al.
patent: 3277840 (1966-10-01), Li
patent: 3744309 (1973-07-01), Astengo

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