US3750174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aided angle tracking device
Assignee: United States Department of the Navy
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Filing: 1963-11-20
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Granted: 1973-07-31
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Expires: 1983-11-20
Abstract
Abstract 2. A method of tracking a target in the presence of enemy jamming which employs a radar tracker and comprises the steps of DERIVING FROM A RADAR RECEIVER TRAVERSE AND ELEVATION COMPONENTS OF AN ANGULAR VELOCITY SIGNAL REPRESENTATIVE OF SAID TARGET ANGULAR VELOCITY WITH RESPECT TO SAID TRACKER IMMEDIATELY PRIOR TO ENEMY JAMMING OF SAID TRACKER, APPLYING SAID TRAVERSE AND ELEVATIONAL COMPONENTS TO A COORDINATE CONVERSION MEANS FOR CONVERTING SAID COMPONENTS INTO STABILIZED HORIZONTAL AND VERTICAL COMPONENTS OF SAID ANGULAR VELOCITY SIGNAL, VECTORIALLY SUMMING SAID HORIZONTAL AND VERTICAL COMPONENTS, STORING THE VECTORIAL SUM AND THE TIME DERIVATIVE THEREOF OF SAID HORIZONTAL AND VERTICAL COMPONENTS IN AN INTEGRATING CIRCUIT, APPLYING SIGNALS FROM SAID INTEGRATING CIRCUIT TO A FUNCTION GENERATOR FOR GENERATING AN ANGULAR RATE SIGNAL W which satisfies the equation
Inventors
- 👤 R Belluck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:18
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/66; G01S13/68
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
157 words
A method of tracking a moving target in the presence of enemy jamming by controlling the angular motion of a radar tractor comprising the steps of deriving an angular velocity signal W representative of target angular velocity with respect to said tracker immediately prior to enemy jamming, storing said angular velocity signal and the first time derivative thereof in an integrating circuit prior to enemy jamming, applying signals from said integrating circuit to a function generator during enemy jamming of said tracker, generating in said function generator the second time derivative W of the derived angular velocity signal W which satisfies the equation W 3/2 (W2/W) - 2W3 where W represents the first time derviative of said angular velocity signal W and applying an angular velocity signal W which satisfies the equation W 3/2 (W2/W) - 2W3 to control circuitry coupled to said radar tracker for causing said radar tracker to track at said last-named angular velocity.
Claim 2
Independent Claim
157 words
A method of tracking a moving target in the presence of enemy jamming by controlling the angular motion of a radar tractor comprising the steps of deriving an angular velocity signal W representative of target angular velocity with respect to said tracker immediately prior to enemy jamming, storing said angular velocity signal and the first time derivative thereof in an integrating circuit prior to enemy jamming, applying signals from said integrating circuit to a function generator during enemy jamming of said tracker, generating in said function generator the second time derivative W of the derived angular velocity signal W which satisfies the equation W 3/2 (W2/W) - 2W3 where W represents the first time derviative of said angular velocity signal W and applying an angular velocity signal W which satisfies the equation W 3/2 (W2/W) - 2W3 to control circuitry coupled to said radar tracker for causing said radar tracker to track at said last-named angular velocity.
Claim 3
Independent Claim
157 words
A method of tracking a moving target in the presence of enemy jamming by controlling the angular motion of a radar tractor comprising the steps of deriving an angular velocity signal W representative of target angular velocity with respect to said tracker immediately prior to enemy jamming, storing said angular velocity signal and the first time derivative thereof in an integrating circuit prior to enemy jamming, applying signals from said integrating circuit to a function generator during enemy jamming of said tracker, generating in said function generator the second time derivative W of the derived angular velocity signal W which satisfies the equation W 3/2 (W2/W) - 2W3 where W represents the first time derviative of said angular velocity signal W and applying an angular velocity signal W which satisfies the equation W 3/2 (W2/W) - 2W3 to control circuitry coupled to said radar tracker for causing said radar tracker to track at said last-named angular velocity.
Claim 4
Independent Claim
157 words
A method of tracking a moving target in the presence of enemy jamming by controlling the angular motion of a radar tractor comprising the steps of deriving an angular velocity signal W representative of target angular velocity with respect to said tracker immediately prior to enemy jamming, storing said angular velocity signal and the first time derivative thereof in an integrating circuit prior to enemy jamming, applying signals from said integrating circuit to a function generator during enemy jamming of said tracker, generating in said function generator the second time derivative W of the derived angular velocity signal W which satisfies the equation W 3/2 (W2/W) - 2W3 where W represents the first time derviative of said angular velocity signal W and applying an angular velocity signal W which satisfies the equation W 3/2 (W2/W) - 2W3 to control circuitry coupled to said radar tracker for causing said radar tracker to track at said last-named angular velocity.
Claim 5
Dependent Claim
64 words
The method of claim 2 wherein the application of said last-named signal to circuitry coupled to said radar tracker includes further the steps of resolving said signal into stabilized horizontal and vertical components, converting said components into traverse and elevational components by rotating said horizontal and vertical components through an angle theta , and applying said traverse and elevational components to said radar tracker.
Claim 6
Dependent Claim
265 words
An electrical system connected to receive angular velocity signals of the line of sight axis between a radar tracker on a ship and a moving target comprising a radar receiver, a first stabilization servo loop interconnecting said receiver and said radar tracker for providing a target elevation control signal at said tracker during normal tracking, a second stabilization servo loop interconnecting said receiver and said radar tracker for providing a target bearing control signal at said tracker during normal tracking, coordinate conversion means connected to each of said stabilization loops for converting deck-oriented elevational and traverse angular velocity signal components within said first and second stabilization servo loops respectively into stabilized vertical and horizontal angular velocity component signals means coupled to said coordinate conversion means for deriving the vector sum of said horizontal and vertical angular velocity signal components, an integrating circuit connected to said last-named means for storage therein said vector sum and a time derivative thereof, a function generator coupled to said integrating circuit for generating an angular velocity signal W which satisfies the equation W 3/2 (W2/W) - 2W3 wherein W and W represent respectively the second and first time derivatives of said angular velocity signal W, said last-named signal being applied through said means for deriving and said coordinate conversion means for enabling said traverse and elevation stabilization servo loops to receive traverse and elevation components of the angular velocity signal of the line of sight axis between said radar tracker and said moving target when said target is moving in a constant velocity in a line away from said ship.
Claim 7
Dependent Claim
265 words
An electrical system connected to receive angular velocity signals of the line of sight axis between a radar tracker on a ship and a moving target comprising a radar receiver, a first stabilization servo loop interconnecting said receiver and said radar tracker for providing a target elevation control signal at said tracker during normal tracking, a second stabilization servo loop interconnecting said receiver and said radar tracker for providing a target bearing control signal at said tracker during normal tracking, coordinate conversion means connected to each of said stabilization loops for converting deck-oriented elevational and traverse angular velocity signal components within said first and second stabilization servo loops respectively into stabilized vertical and horizontal angular velocity component signals means coupled to said coordinate conversion means for deriving the vector sum of said horizontal and vertical angular velocity signal components, an integrating circuit connected to said last-named means for storage therein said vector sum and a time derivative thereof, a function generator coupled to said integrating circuit for generating an angular velocity signal W which satisfies the equation W 3/2 (W2/W) - 2W3 wherein W and W represent respectively the second and first time derivatives of said angular velocity signal W, said last-named signal being applied through said means for deriving and said coordinate conversion means for enabling said traverse and elevation stabilization servo loops to receive traverse and elevation components of the angular velocity signal of the line of sight axis between said radar tracker and said moving target when said target is moving in a constant velocity in a line away from said ship.
Claim 8
Independent Claim
148 words
A method of controlling the angular motion of a radar tracker while tracking a moving target during enemy jamming at the tracker which comprises the steps of deriving traverse and elevational components of the angular velocity signal of the line of sight axis between said radar tracker and said moving target, converting said traverse and elevational components into stabilized horizontal and vertical components of said angular velocity signal, summing said horizontal and vertical components vectorially, storing the vectorial sum of said last-named components in an integrating circuit applying signals from said integrating circuit to a function generator for generating an angular velocity signal of the line of sight axis between said radar tracker and said moving target when said target is moving in a constant velocity away from said tracker, and applying said last-named signal to control circuitry coupled to said tracker for control thereof during enemy jamming.
Claim 9
Independent Claim
148 words
A method of controlling the angular motion of a radar tracker while tracking a moving target during enemy jamming at the tracker which comprises the steps of deriving traverse and elevational components of the angular velocity signal of the line of sight axis between said radar tracker and said moving target, converting said traverse and elevational components into stabilized horizontal and vertical components of said angular velocity signal, summing said horizontal and vertical components vectorially, storing the vectorial sum of said last-named components in an integrating circuit applying signals from said integrating circuit to a function generator for generating an angular velocity signal of the line of sight axis between said radar tracker and said moving target when said target is moving in a constant velocity away from said tracker, and applying said last-named signal to control circuitry coupled to said tracker for control thereof during enemy jamming.
Claim 10
Independent Claim
112 words
A method of controlling a radar tracker during enemy jamming comprising the steps of deriving an angular velocity signal W representative of a target''s angular velocity with respect to the tracker immediately prior to enemy jamming, storing said angular velocity signal W in a function generating means and thereafter generating in said function generating means an angular velocity signal W satisfying the equation W 3/2 (W2/W) - 2W3 wherein W represents the second time derivative of the angular velocity signal W and W represents the first time derivative of the angular velocity signal W and applying said last-named angular velocity signal W to said radar tracker for control thereof during enemy jamming.
Claim 11
Independent Claim
112 words
A method of controlling a radar tracker during enemy jamming comprising the steps of deriving an angular velocity signal W representative of a target''s angular velocity with respect to the tracker immediately prior to enemy jamming, storing said angular velocity signal W in a function generating means and thereafter generating in said function generating means an angular velocity signal W satisfying the equation W 3/2 (W2/W) - 2W3 wherein W represents the second time derivative of the angular velocity signal W and W represents the first time derivative of the angular velocity signal W and applying said last-named angular velocity signal W to said radar tracker for control thereof during enemy jamming.
Claim 12
Dependent Claim
140 words
An electrical system connectable to a radar tracker for receiving angular velocity signals of the line of sight axis from the tracker to a moving target comprising conductive means connected to said tracker, intergrating means connected to said conductive means for storing an angular velocity signal and a time derivative of said angular velocity signal representative of the angular velocity of said line of sight axis immediately prior to enemy jamming at said tracker and a function generator coupled to said integrating means responsive to signals from said integrating means for generating an angular velocity signal W which satisfies the equation W (3/2) (W2/W) - 2W3 wherein W and W represent respectively the second and first time derivatives of said angular velocity signal W, whereby said last-named Signal may be applied to said tracker for control thereof during enemy jamming.
Claim 13
Dependent Claim
140 words
An electrical system connectable to a radar tracker for receiving angular velocity signals of the line of sight axis from the tracker to a moving target comprising conductive means connected to said tracker, intergrating means connected to said conductive means for storing an angular velocity signal and a time derivative of said angular velocity signal representative of the angular velocity of said line of sight axis immediately prior to enemy jamming at said tracker and a function generator coupled to said integrating means responsive to signals from said integrating means for generating an angular velocity signal W which satisfies the equation W (3/2) (W2/W) - 2W3 wherein W and W represent respectively the second and first time derivatives of said angular velocity signal W, whereby said last-named Signal may be applied to said tracker for control thereof during enemy jamming.
Claim 14
Independent Claim
172 words
A method of controlling the angular motion of a radar tracker while tracking a moving target during enemy jamming at the tracker which comprises the steps of deriving traverse and elevational components of the angular velocity signal of the line of sight axis between said radar tracker and said moving target, converting said traverse and elevational components into stabilized horizontal and vertical components of said angular velocity signal, summing said horizontal and vertical components vectorially, storing the vectorial sum of said last-named components in an integrating circuit applying signals from said integrating circuit to a function generator for generating an angular velocity signal of the line of sight axis between said radar tracker and said moving target when said target is moving in a constant velocity away from said tracker, resolving said angular velocity signal into its horizontal and vertical components, converting said horizontal and vertical components into traverse and elevational components and applying said traverse and elevational components to said tracker for separately controlling the elevation and bearing at said tracker.
Claim 15
Independent Claim
172 words
A method of controlling the angular motion of a radar tracker while tracking a moving target during enemy jamming at the tracker which comprises the steps of deriving traverse and elevational components of the angular velocity signal of the line of sight axis between said radar tracker and said moving target, converting said traverse and elevational components into stabilized horizontal and vertical components of said angular velocity signal, summing said horizontal and vertical components vectorially, storing the vectorial sum of said last-named components in an integrating circuit applying signals from said integrating circuit to a function generator for generating an angular velocity signal of the line of sight axis between said radar tracker and said moving target when said target is moving in a constant velocity away from said tracker, resolving said angular velocity signal into its horizontal and vertical components, converting said horizontal and vertical components into traverse and elevational components and applying said traverse and elevational components to said tracker for separately controlling the elevation and bearing at said tracker.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |