EP0474362A2
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EP
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Angular velocity sensing apparatus
Assignee: BAE Systems PLC
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Filing: 1991-08-02
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Granted: —
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Expires: 2011-08-02
Abstract
Abstract An angular velocity sensing system comprises a tachometer (14) of relatively low resolution which measures the rotation of a shaft (12) in terms of a movement between discrete tachometer sensing positions and a rate gyro (16) which monitors any change in the angular velocity between the discrete tachometer sense positions and signal processing means 18 to combine the two signals in order to remove errors, and to give a continuous measure of angular velocity.
Inventors
- 👤 Malcolm P. British Aerospace Systems Varnham
- 👤 Diana British Aerospace Systems Hodgins
- 👤 Timothy S. British Aerospace Systems Norris
- 👤 Huw D. British Aerospace Systems Thomas
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 08:49
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01D; G01D21/00; G01D21/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
60 words
Angular velocity sensing apparatus for sensing the angular velocity of a rotary member (12) includes a first sensor (14) of relatively low resolution for providing a signal representing a low resolution measurement of the angular velocity of said rotary member (12) and a second sensor (16) of relatively high sensitivity for refining the measurement provided by said first sensor (14).
Claim 2
Dependent Claim
25 words
Angular velocity sensing apparatus according to Claim 1, wherein said first sensor (14) provides an output representing discrete angular positions of said rotary member (12).
Claim 3
Dependent Claim
33 words
Angular velocity sensing apparatus according to Claim 1 or 2, wherein said first sensor (14) provides a pulse train output with each pulse indicating a discrete angular position of said rotary member (12).
Claim 4
Dependent Claim
19 words
Angular velocity sensing apparatus according to any preceding claim, wherein said first sensor (14) is a rotary position encoder.
Claim 5
Dependent Claim
19 words
Angular velocity sensing apparatus according to and preceding claim, wherein said second sensor (16) is an angular rate sensor.
Claim 6
Dependent Claim
18 words
Angular velocity sensing apparatus according to Claim 5, wherein said angular rate sensor (16) is a rate gyroscope.
Claim 7
Dependent Claim
38 words
Angular velocity sensing apparatus according to any preceding claim, including control means (18) for receiving the outputs of said first and second sensors (14,16) and for producing an output representative of the velocity of said rotary member (12).
Claim 8
Dependent Claim
97 words
A velocity control system including angular velocity sensing apparatus for sensing the angular velocity of a rotary member (12) said sensing apparatus comprising a first sensor (14) of relatively low resolution for providing a signal representing a low resolution measurement of the angular velocity of said rotary member (12) and a second sensor (16) of relatively high sensitivity for refining the measurement provided by said first sensor (14), and drive means (10) for driving said rotary member (12) dependent on an error signal derived from the refined measurement of the angular velocity and an input demand signal.
Claim 9
Dependent Claim
57 words
Angular displacement sensing apparatus for sensing the angular displacement of a rotary member (12) includes a first sensor (14) of relatively low resolution for providing a signal representing an estimate of the angular displacement of said member (12) and a second sensor (16) of relatively high resolution for refining the estimate provided by said first sensor (14).
Claim 10
Dependent Claim
98 words
A displacement control system including angular displacement sensing apparatus for sensing the angular displacement of a rotary member (12) said sensing apparatus including a first sensor (14) of relatively low resolution for providing a signal representing a low resolution measurement of the angular displacement of said rotary member (12) and a second sensor (16) of relatively high sensitivity for refining the measurement provided by said first sensor (14), and drive means (10) for driving said rotary member (12) dependent on an error signal derived from the refined measurement of the angular displacement velocity and an input demand signal.
Claim 11
Dependent Claim
91 words
Angular motion sensing apparatus for sensing the motion of a rotary member (12) includes a first sensor (14) responsive to angular displacement of the rotary member (12) and a second sensor (16) responsive to the angular velocity of said rotary member (12), wherein said first sensor (14) is operable to provide an output representing a series of estimates of the average turning rate of the rotary member (12) and the second sensor (16) is operable to monitor any change in angular velocity between the estimates provided by said first sensor (14).
References Cited (Backward Citations)
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