Patent US2857316A successfully refreshed from Google Patents.
US4092578A
Expired / Lapsed
US
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Elimination of voter caused deadzone
Assignee: Boeing North American Inc
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Filing: 1976-12-03
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Granted: 1978-05-30
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Expires: 1996-12-03
Abstract
Abstract A redundant channel control system includes one or more voters having a high-pass filter connected between a pair of voter inputs.
Inventors
- 👤 Gordon R. Fabian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:52
CPC Classifications
G; G05; G05B; G05B9/00; G05B9/02; G05B9/03; G05D; G05D1/00; G05D1/0055; G05D1/0077
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
125 words
A dual channel closed loop servo system comprising: servomotor means, and two servomotor means drive circuits each comprising (a) signal comparison means for receiving both an input command signal and a feedback signal indicative of said servomotor means output position, and for producing a corrective error signal for inducing servomotor means response, (b) feedback means for producing said feedback signal, (c) mid-algebraic value voter means having three input means, the first input means connected to receive the error signal of one drive circuit, the second input means connected to receive the error signal of the other drive circuit, and (d) high-pass filter means connected between the third input means of said voter means and one of the other two input means of said voter means.
Claim 2
Dependent Claim
125 words
A dual channel closed loop servo system comprising: servomotor means, and two servomotor means drive circuits each comprising (a) signal comparison means for receiving both an input command signal and a feedback signal indicative of said servomotor means output position, and for producing a corrective error signal for inducing servomotor means response, (b) feedback means for producing said feedback signal, (c) mid-algebraic value voter means having three input means, the first input means connected to receive the error signal of one drive circuit, the second input means connected to receive the error signal of the other drive circuit, and (d) high-pass filter means connected between the third input means of said voter means and one of the other two input means of said voter means.
Claim 3
Dependent Claim
33 words
Apparatus as defined in claim 1 wherein each said high-pass filter means is connected at its associated voter means input side so as to receive a different one of the two error signals.
Claim 4
Dependent Claim
21 words
Apparatus as defined in claim 1 wherein each said high-pass filter means comprises resistor means and capacitor means connected in series.
Claim 5
Dependent Claim
113 words
In a redundant channel control system having N channels for producing N substantially similar where N≧2, and signal selector means having (N+1) input means connected for receiving said N channels plus an (N+1)th input signal, said signal selector means providing an output corresponding to the input whose amplitude ranks J th among the amplitude ordered arrangement from most positive through most negative of the (N+1) input amplitudes, J being one of the group of numbers 1 through (N+1), the improvement comprising high-pass filter means connected between (a) any one of the input means connected for receiving one of the N channels and (b) the input means connected for receiving said (N+1)th input signal.
Claim 6
Dependent Claim
113 words
In a redundant channel control system having N channels for producing N substantially similar where N≧2, and signal selector means having (N+1) input means connected for receiving said N channels plus an (N+1)th input signal, said signal selector means providing an output corresponding to the input whose amplitude ranks J th among the amplitude ordered arrangement from most positive through most negative of the (N+1) input amplitudes, J being one of the group of numbers 1 through (N+1), the improvement comprising high-pass filter means connected between (a) any one of the input means connected for receiving one of the N channels and (b) the input means connected for receiving said (N+1)th input signal.
Claim 7
Dependent Claim
31 words
Apparatus as defined in claim 4 wherein N=2, and J=2, such that said signal selector means has three inputs and provides an output corresponding to the input having the mid-algebraic value.
Claim 8
Dependent Claim
127 words
In a redundant channel control system having N channels for producing N substantially similar signals where N≧2, and N signal selector means each having (N+1) input means connected for receiving said N channels plus an (N+1)th input signal, each said signal selector means providing an output corresponding to the input whose amplitude ranks J th among the amplitude ordered arrangement from most positive through most negative of the (N+1) input amplitudes, J being one of the group of numbers 1 through (N+1), the improvement comprising N high-pass filter means each connected at the input side of a different one of said N signal selector means so as to be between the associated selector means's (N+1)th signal input means and any one of the N remaining input means.
Claim 9
Dependent Claim
127 words
In a redundant channel control system having N channels for producing N substantially similar signals where N≧2, and N signal selector means each having (N+1) input means connected for receiving said N channels plus an (N+1)th input signal, each said signal selector means providing an output corresponding to the input whose amplitude ranks J th among the amplitude ordered arrangement from most positive through most negative of the (N+1) input amplitudes, J being one of the group of numbers 1 through (N+1), the improvement comprising N high-pass filter means each connected at the input side of a different one of said N signal selector means so as to be between the associated selector means's (N+1)th signal input means and any one of the N remaining input means.
Claim 10
Dependent Claim
34 words
Apparatus as defined in claim 6 wherein each said high-pass filter means is connected at its associated selector means input side so as to receive a different one of said N substantially similar signals.
Claim 11
Independent Claim
91 words
The system comprising: (a) signal selector means (i) having a predetermined plural number M of input means, (M-1) of which are connected for receiving one each of (M-1) input signals, and (ii) providing an output corresponding to the input whose amplitude ranks J th among the amplitude ordered arrangement from most positive through most negative of the M input amplitudes, and (b) high-pass filter means connected between (i) any one of the (M-1) input means connected for receiving one of the (M-1) input signals and (ii) the M th input means.
Claim 12
Independent Claim
91 words
The system comprising: (a) signal selector means (i) having a predetermined plural number M of input means, (M-1) of which are connected for receiving one each of (M-1) input signals, and (ii) providing an output corresponding to the input whose amplitude ranks J th among the amplitude ordered arrangement from most positive through most negative of the M input amplitudes, and (b) high-pass filter means connected between (i) any one of the (M-1) input means connected for receiving one of the (M-1) input signals and (ii) the M th input means.
Claim 13
Dependent Claim
8 words
Apparatus as defined in claim 8 wherein M≧3.
Claim 14
Dependent Claim
10 words
Apparatus as defined in claim 9 wherein M=3 and J=2.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-29 | 1981-11-28 | 1982-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-29 | 1985-11-28 | 1986-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-29 | 1989-11-28 | 1990-05-30 | $7700.00 | Window Closed / Lapsed |