US4387624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for increasing the tracking accuracy of an aiming system
Assignee: Saab Bofors AB
•
Filing: 1980-10-01
•
Granted: 1983-06-14
•
Expires: 2000-10-01
Abstract
Abstract The invention relates to a device for increasing the tracking accuracy of an aiming system for a gun or the like which includes a gun servo. The gun servo comprises a special stabilizing and accuracy-increasing network (20) which comprises one or a plurality of integrating second-degree filters (25) the transmission functions (G R ) of which have such a form that the amplitude as a function of the frequency has a maximum near the expected frequency of the base movements of the gun and/or the movement of the target, which makes it possible to have a high system gain around and below said frequency.
Inventors
- 👤 Lennart Bjurstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:22
CPC Classifications
F; F41; F41G; F41G3/00; F41G3/22; F41G5/00; F41G5/14
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
93 words
A device for increasing the tracking accuracy of a gun aiming servo system for a moving target comprising: a stabilizing and accuracy increasing network for processing a signal in said servo system, said network including an integrating second order filter having a transfer function of ##EQU3## where ρ 1 and ρ 2 are damping factors, and ω 1 and ω 2 are angular frequencies of the gun base movements and target and said transfer function has a maximum amplitude for signals which have a frequency of substantially ω 1 and ω 2 .
Claim 2
Independent Claim
93 words
A device for increasing the tracking accuracy of a gun aiming servo system for a moving target comprising: a stabilizing and accuracy increasing network for processing a signal in said servo system, said network including an integrating second order filter having a transfer function of ##EQU3## where ρ 1 and ρ 2 are damping factors, and ω 1 and ω 2 are angular frequencies of the gun base movements and target and said transfer function has a maximum amplitude for signals which have a frequency of substantially ω 1 and ω 2 .
Claim 3
Dependent Claim
37 words
A device according to claim 1 wherein said servo system comprises a ship-based naval gun, radar equipment, optical or optronic sight, the frequencies ω 1 and ω 2 are substantially at the rolling frequency of the ship.
Claim 4
Dependent Claim
33 words
A device according to claim 1 wherein the aiming system is vehicle based the frequencies ω 1 and ω 2 are near the rolling frequency of the vehicle when moving on the ground.
Claim 5
Dependent Claim
33 words
A device according to claim 1 wherein the aiming servo system consists of a land-based aiming system, and frequencies ω 1 and ω 2 are the expected movement frequency range of the target.
Claim 6
Dependent Claim
36 words
A device according to claim 1 wherein the gun servo system further comprises means for connecting the stabilizing and accuracy-increasing network only when the error signal of the gun servo system is below a certain value.
Claim 7
Dependent Claim
49 words
A device according to claim 1 wherein the gun servo system, in addition to the stabilizing and accuracy-increasing network comprises a load-compensating network of the same configuration as the integrating second-degree filters of the derivating type having breaking frequencies in the vincinity of the natural frequency of the system.
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) | 1986-06-13 | 1986-12-13 | 1987-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-13 | 1990-12-13 | 1991-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-13 | 1994-12-13 | 1995-06-14 | $7700.00 | Window Closed / Lapsed |