US4675805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for adjusting the PID characteristics of controller compensating networks, particularly in hydraulic pulsing machines
Assignee: Deutsches Zentrum für Luft- und Raumfahrt eV
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Filing: 1984-08-21
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Granted: 1987-06-23
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Expires: 2004-08-21
Abstract
Abstract PID characteristics of a closed-loop type controller compensation network for a hydraulic pulsing machine coupled with a test specimen are adjusted by determining the closed-loop stability locus of the network and adjusting PID characteristics until the stability locus is located at a desired position.
Inventors
- 👤 Raymond Freymann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:55
CPC Classifications
G; G05; G05B; G05B23/00; G05B23/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
97 words
A method of adjusting PID characteristics of a controller compensating network fitted in the closed control loop of a hydraulic pulsing machine coupled with a test specimen, and with the method comprising the steps of: (a) determining the closed loop stability locus of the network by applying a set-value wide band frequency signal in the form of a swept sine or random signal to the control loop and the set-value signal and resultant signal is measured and correlated, and (b) adjusting the PID characteristics of the network until the stability locus is located at a desired position.
Claim 2
Independent Claim
97 words
A method of adjusting PID characteristics of a controller compensating network fitted in the closed control loop of a hydraulic pulsing machine coupled with a test specimen, and with the method comprising the steps of: (a) determining the closed loop stability locus of the network by applying a set-value wide band frequency signal in the form of a swept sine or random signal to the control loop and the set-value signal and resultant signal is measured and correlated, and (b) adjusting the PID characteristics of the network until the stability locus is located at a desired position.
Claim 3
Dependent Claim
75 words
Apparatus for determining the PID characteristics of a controller compensating network fitted in the closed control loop of a hydraulic pulsing machine, and with the apparatus comprising, in combination, signal generator means comprising a sine-sweep or random signal generator adapted to be coupled with the loop for applying a set value signal to the network, and measuring means adapted to be coupled with the loop for correlating actual and set signal values within the loop.
Claim 4
Dependent Claim
75 words
Apparatus for determining the PID characteristics of a controller compensating network fitted in the closed control loop of a hydraulic pulsing machine, and with the apparatus comprising, in combination, signal generator means comprising a sine-sweep or random signal generator adapted to be coupled with the loop for applying a set value signal to the network, and measuring means adapted to be coupled with the loop for correlating actual and set signal values within the loop.
References Cited (Backward Citations)
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US4549123A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-22 | 1990-12-22 | 1991-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-22 | 1994-12-22 | 1995-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-22 | 1998-12-22 | 1999-06-23 | $7700.00 | Window Closed / Lapsed |