US3897917A - Weapon delivery system - Google Patents

Weapon delivery system Download PDF

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Publication number
US3897917A
US3897917A US291106A US29110672A US3897917A US 3897917 A US3897917 A US 3897917A US 291106 A US291106 A US 291106A US 29110672 A US29110672 A US 29110672A US 3897917 A US3897917 A US 3897917A
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Prior art keywords
series
signals
signal
fast acting
sample
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US291106A
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English (en)
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Robert Henry Johnson
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Motorola Solutions Inc
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Motorola Inc
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Priority to US291106A priority Critical patent/US3897917A/en
Priority to GB3288373A priority patent/GB1411027A/en
Priority to GB13974A priority patent/GB1411028A/en
Priority to IT51497/73A priority patent/IT991986B/it
Priority to IL43100A priority patent/IL43100A0/xx
Priority to DE19732347460 priority patent/DE2347460A1/de
Priority to JP48106096A priority patent/JPS4970398A/ja
Application granted granted Critical
Publication of US3897917A publication Critical patent/US3897917A/en
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D1/00—Control of position, course, altitude or attitude of land, water, air or space vehicles, e.g. using automatic pilots
    • G05D1/12—Target-seeking control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41G—WEAPON SIGHTS; AIMING
    • F41G7/00—Direction control systems for self-propelled missiles
    • F41G7/20—Direction control systems for self-propelled missiles based on continuous observation of target position
    • F41G7/22—Homing guidance systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41G—WEAPON SIGHTS; AIMING
    • F41G7/00—Direction control systems for self-propelled missiles
    • F41G7/20—Direction control systems for self-propelled missiles based on continuous observation of target position
    • F41G7/22—Homing guidance systems
    • F41G7/226—Semi-active homing systems, i.e. comprising a receiver and involving auxiliary illuminating means, e.g. using auxiliary guiding missiles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41G—WEAPON SIGHTS; AIMING
    • F41G7/00—Direction control systems for self-propelled missiles
    • F41G7/20—Direction control systems for self-propelled missiles based on continuous observation of target position
    • F41G7/22—Homing guidance systems
    • F41G7/2273—Homing guidance systems characterised by the type of waves
    • F41G7/2286—Homing guidance systems characterised by the type of waves using radio waves

Definitions

  • references Cited Improved means for obtaining the signal from its UNITED STATES PATENTS surrounding noise and improved means for obtaining 3.72U.l3l 3/19 3 Fr h ck 39/41 ME target resolution of about 20 feet or less are also disclosed.
  • a control system for guiding a missile in azimuth and elevation toward a radiating target comprising a series of sensors adapted to be disposed on such missile for receiving such radiation and being adapted for determining azimuthal and elevational information; a processing circuit for the signals from said sensors; a first series of fast acting switches one each of which is connected between one each of said sensors and said processing circuit; each one of said first series of switches including meanss for setting the on and off condition of the respective switch; a series of sample and hold means one each for each of said sensors connected to receive the signals from the processing circuit; each one of said series of sample and hold means including means for setting the on and off condition of the re spective sample and hold means; an azimuthal signal comparator and an elevational signal comparator; a second series of fast acting switches one each of which is connected to one each of said sample and hold means, respectively, azimuthally related ones of said second series of fast acting switches being connected to said azimuthal signal
  • a control system for guiding a missile in azimuth and elevation toward a radiating target comprising; a series of sensors adapted to be disposed on such missile for simultaneous exposure to such radiation and being adapted for determining azimuthal and elevational signals; means for sequentially sampling in continuous cycles the signals on said sensors and holding the sampled data until all sensors have been sampled in each cycle; means effective after said sampling sequence in each cycle for comparing the held azimuthal data and the held elevational data; and means for transmitting said compared azimuthal data to azimuth utilization means and said elevational data to elevation utilization means.
  • control system of the invention includes means for improving the signal to raise the ratio of the signals on said sensors; means for detecting a threshold value of said signals and preventing sampling and holding of such signals unless at least equal to said threshold value, and means for discriminating against extraneous pulses.
  • FIG. 1 is a diagrammatic representation of a bomb being delivered to a target in accordance with the invention'
  • FIG. 2 is a block diagram illustrating a control system according to the invention
  • FIG. 3 is a series of pulse diagrams useful in understanding the operation of the invention.
  • FIG. 4 is diagrammatic representation of one component of the inventive apparatus
  • FIG. 5 is a series of wave shapes illustrating direct and reflected pulses on a different scale
  • FIG. 6 is a diagrammatic representation of another component of the inventive apparatus.
  • FIG. 7 is a timing diagram useful in understanding the operation of the invention.
  • the invention is shown as comprising a control circuit 10 (FIG. 2) to be included on a bomb, or the like, 11 illustrated in FIG. 1 as being directed toward a bridge 12, the bomb being guided by the radiation beam 13 emanating from a transmitter 14 secreted on the bridge floor.
  • a control circuit 10 FIG. 2 to be included on a bomb, or the like, 11 illustrated in FIG. 1 as being directed toward a bridge 12, the bomb being guided by the radiation beam 13 emanating from a transmitter 14 secreted on the bridge floor.
  • radiation includes direct radiation from one, or more, generating sources, reflected radiation of such sources from nearby objects and combined radia tion pulses, or beams.
  • the radar (radiation) beam 13 may be exemplified by a pulse 15 which is intended to be received by, and to actuate, the mechanism aboard, the bomb II for guiding it to the designated spot.
  • the reflected paths are exemplified by the beam 16 which includes a path portion I7 extending from the transmitter to the nearest reflecting surface, for example, as the river or other stream 18.
  • the reflected path I6 is longer by the distance 17 and thus the pulse 19 exemplifying the beam 16 is shown behind the pulse 15, signifying a delay in time.
  • the circuitry in total must be small so that it can be placed in a small compartment within the bomb and not detract from the explosive carrying capa bility thereof. It likewise must not require large amounts of power to function for essentially the same reason.
  • the utilization of such control circuitry aboard large numbers of bombs, or the like requires that the overall cost of the control circuit be very small.
  • the circuitry must be functional under all kinds of weather conditions, whether it be rain, dust, clouds, snow, darkness, or other obscuring conditions. Having the transmitter 14 generate microwaves around the X band, for example, of the orrder of gigahertz (GHZ) or higher serves the purposes indicated.
  • GZ gigahertz
  • the transmitter 14 may be of any well-known form for generating frequencies of the nature indicated and should be small so as to be readily concealable on a bridge, bunker, or other structure, which is intended to be destroyed.
  • the transmitter may be disposed on the target in any known fashion such for example as being left there by withdrawing troups, being deposited secretively by an agent, or, for that matter, being delivered to the structure by parachute or otherwise.
  • the bomb after being directed at a particular target is intended to home in upon that target by receiving the radiated signal therefrom while excluding, or discriminating against, the signals being radiated by other targets in the vicinity.
  • the ability to re solve signals differing in time by about twenty nanoseconds or less, as indicated, is adequate for this purpose.
  • FIG. 2 four sensors such as wide beam antennas 21, 22, 23 and 24 may be quadrantally mounted about the nose of the bomb as shown in FIG. I.
  • Antennas 2] and 23 may, for example, control the bomb in elevation while the antennas 22 and 24 control the bomb in azimuth. More or less antennas, or other sensors, may be used to suit the particular circumstances.
  • the elevational control is indicated by the reference character 25 and the azimuthal control is indicated by the reference character 26 in FIG. 2.
  • the sensors 21, 22, 23, and 24 are connected, respectively, through conductors 27, 28, 29 and 31 to the in-terminals of switches 32, 33, 34 and 35 respectively.
  • the exit-terminals of switches 32, 33, 34 and 35 are connected, respectively, through conductors 36, 37, 38
  • the output side of processing circuit 43 is connected through conductor 44 to a conductor 45 and thus through conductors 46, 47, 48 and 49 to the interminals of sample and hold circuits 5]. 52, 53. 54 respectively.
  • the exit-terminals of sample and hold circuits 51, 52, 53, 54 are connected, respectively, through conductors 55, 56, 57 and 58 to switches 59, 6], 62 and 63, respectively.
  • the exit-terminals of switches 59 and 62 are connected, respectively, by means of conductors 64 and 65 to the in-terminals of a comparator circuit 66.
  • the exit-terminals of switches 61 and 63 are connected, respectively, through conductors 67 and 68 to the in-terminals of a comparator circuit 69.
  • the exit-terminal of comparator circuit 66 is connected through conductor 71 to the interminal of an integrating circuit 72 and thus to the elevation control.
  • the exit-terminal of comparator circuit 69 is connected through conductor 73 to the in-terminal of an integrating circuit 74 and thus to the azimuth control.
  • the switches 32-35 may be of any well-known form suitable for the purpose but in a preferred form of the invention are well known, fast-acting solid state devices.
  • the on and off conditions thereof are controlled by appropriate voltage pulses, or levels, appearing on conductors 75, 76, 77, and 78, respectively, and thus from conductor 79 connected to sequencer 81 from which the control signals are supplied.
  • the sample and hold circuits 51-54 to be more particularly described are controlled by appropriate signals appearing on their control terminals through conductors 82, 83, 84 and 85, respectively, connected to a conductor 86 which is in turn connected to sequencer 81 which supplies the appropriate control voltages as will be described.
  • the switches 5963 inclusive may be of any suitable type appropriate to the purpose but according to a preferred form of the invention are well-known, fast-acting solid state devices.
  • the on and off conditions thereof are controlled by appropriate voltage pulses, or levels, appearing on conductors 87, 88, 89 and 91.
  • Conductors 87, 88, 89 and 9] are connected to a conductor 92 which, in turn, is connected to the sequencer 81 which supplies the control signals as will be more particularly described.
  • the sequencer serves to activate the appropriate switches and the sample and hold circuits in the desired sequence so that each incoming signal is processed in the processing circuit 43 in its turn.
  • switch 32 is activated, or in the on condition, at the same time that sample and hold 51 and switch 59 are activated, switch 33 is activated at the same time that sample and hold 52 and switch 61 are activated, switch 34 is activated at the same time that sample and hold 53 and switch 62 are activated, and switch 35 is activated at the same time that sample and hold 54 and switch 63 are activated.
  • the processing circuit 43 comprises a mixer 93, an amplifier 94, a compression filter, or the like, 95, and an amplifier 96 connected as shown by conductors 97, 98, and 99 between the input conductors 42 and 44.
  • the output signal of amplifier 96 at conductor 44 is also connected through a conductor N11 to a threshold detector 102 and thus through a conductor M3 to control the sequencer 81.
  • the mixer serves the usual function of heterodyning the incoming frequency with a locally generated signal (not shown) to develop a signal of intermediate frequency which is processed through the circuitry.
  • the amplifiers of well-known type serve their usual function and the compression filter 95 is one form of device which may be used, according to the invention. to separate the intelligence. or desired signal. from the surrounding noise in which it may appear.
  • a compression filter such as acoustic surface wave devices, biphase coded devices utilizing shift registers, or other devices may be used for signal extraction.
  • Acoustic surface wave devices may be utilized for producing a delay in the received signal for any purpose desired.
  • the sequencer 81 activates (turns on) the switches 32, 33, 34 and 35 in sequence, each being on for 0.001 second, for example, but as previously indicated the signals from sensors, or antennas 21 and 23 ultimately are compared in comparator 66 for controlling the elevation and the signals from sensors, or antennas 22 and 24, and ultimately are compared in comparator 69 for controlling the azimuth.
  • the sequence 81 may be of any wellknown form which will develop voltage pulses, or levels, of the desired value and at the proper time, and in the proper sequence.
  • the signal generated by transmitter 14 may be in the form of bursts of pulses whose envelope is shown by the square pulse 104 of FIG. 3.
  • the burst typically may last for 2.5 microseconds, or less, and have a peak power of about one watt or more.
  • the radar, or radiated signal need not be of fixed frequency, but according to one form of the invention may vary about 250 mHZ or less during the 2.5 microsecond, for example, interval as shown by the triangular outline 105, of FIG. 3, F be ing, for example, 9,750 megacycles and F being [0,000 megacycles. When such a pulse is received by the compression filter 95 the 2.5 microsecond interval is compressed into.
  • the peak power is amplified from 1 watt to 25 watts, on an unattenuated basis, as shown by the outline 106 of FIG. 3.
  • the power amplification ratio of 25 is sufficient to cause the desired or intelligence signal 104, 106 to emerge from the surrounding random noise whose power is not amplified by the compression filter in the same manner.
  • the compression filter 95 an acoustic surface wave device
  • the compression filter 95 may comprise a substrate or supporting element 107 of any suitable piezoelectric material such as quartz. for example, upon which has been formed, by any suitable process, such as vacuum deposition or photoresist techniques, two series of fingers 108 and 109, the fingers being spaced with decreasing widths between them as shown.
  • the input conductors 98 are connected to the fingers of the series 108 and the output conductors 99 are connected to the fingers of the series 109.
  • the burst of pulses as exemplified by pulse 104 of FIG.
  • the electromagnetic energy received at the input terminals propagates down the surface of the piezoelectric device at an acoustic velocity dependent upon the frequency of the received signal.
  • the distance 5 between the nearcst fingers 108A and 109A (H6. 4) is chosen relative to the distance S, between the fingers [08B and 1098 so that the time of propagation for the low frequency waves differs from the time of propagation of the high frequency waves by the interval of 0.] microseconds in a particular case.
  • the time interval can be made large or small as desired, which is to say that the compression ratio between the time interval of the generated pulse and that of the propagated pulse can be selected to be some desired number.
  • an initial delay exemplified by the distance S, between fingers 108A and 109A representing the time of propagation between these two fingers of the low frequency incident waves.
  • the signal received on the bomb 11 may be substantially attenuated to a lesser value.
  • a bridge structure 12, as shown having large amounts of metal surrounding the transmitter, will attenuate the transmitted signal rather severely.
  • the compression filter serves the useful purpose in amplifying the received signal above the surrounding noise level while at the same time keeping the size and weight of the system components to a very low value.
  • the receiving system it is one of the purposes of the invention for the receiving system to have a target resolution of about 20 feet. That is to say the receiver can distinguish between radiations received from targets about 20 feet apart whether the radiations received are directly from a transmitter or indirectly as a reflection of that signal.
  • FIG. 1 this has been shown diagrammatically by the bomb ll being in the pathway of a direct signal pulse 15 and a reflected signal pulse 19.
  • the concept of the invention is that the receiving system can distinguish between the time of arrival of the leading edges of the two pulses, The receiving system will respond to the leading edge of one pulse of appropriate power level and will reject any signal arriving more than 20 nanoseconds later.
  • FIG. 5 there is shown diagrammatically a direct transmitted pulse 106 which corresponds to the pulse after its reception and processing through the compression filter 95. Thus this pulse has a time span of 0.1 microseconds similar to that shown in FIG. 3.
  • the pulse 106 also corresponds to the pulse 15 of FIG. 1 after reception and processing.
  • a reflected pulse 106A which in solid lines is shown as being of the same amplitude as pulse 106. This is for illustrative purposes only inasmuch as the reflected pulse may be larger than the directly transmitted pulse when the direct transmitter pulse has been attenuated more than the reflected as indicated.
  • the dotted line 1068 indicates diagrammatically the fact that the reflected pulse 106A may be larger in amplitude.
  • the leading edges of pulses I06 and 106A are shown apart by about one-half of the pulse width that is, about fifty nanoseconds.
  • the receiver of the invention discriminates between the pulses 106 and 106A. lt receives pulse 106, or the leading part thereof, and rejects the pulse 106A. Also in FIG. 5 there is shown a composite pulse combining pulses 106 and 106A as well as 1068.
  • the receiving and discriminating circuit of the invention activates a gate (switch) to receive a pulse once the leading edge 106C of proper amplitude is re ceived and discriminates against pulses received more than 20 nanoseconds later by virtue of the fact that the gate deactivates and thus avoids receiving any further signals.
  • the 20 nanosecond time interval is indicated by the letter D.
  • a threshold 111 above the datum of the pulses, this threshold having a value such as to indicate that a significant signal is being received.
  • the sample and hold circuit is the sample and hold circuit 51 of FIG. 2 and corresponding reference characters are used.
  • the portion thereof to the left of the dotted line 112 corresponds to the sample and hold circuit 51 whereas the portion to the right corresponds to the switch 59 of FIG. 2 and the conductors connected thereto.
  • the components of the sample and hold circuit 51, as shown in FIG. 6, comprise a MOSFET device (gate) 113, a capacitor 114, a fast-acting switch 115, an amplifier 116 and a second capacitor 117.
  • the MOSFET device 113 has a source (drain) 118, a drain (source) 119 and a gate electrode 121 as is well under stood in this art.
  • the source 118 is connected to input terminal 46
  • the drain 118 is connected to one terminal of the capacitor 114 and 122 and is also connected to the input terminal of the fast-acting switch 115 which may be a solid-state device.
  • the other terminal of capacitor 114 is grounded as shown.
  • the gate terminal 121 receives the signal to turn on or activate the sample and hold circuit 51 over the conductors 82 and 86 from the sequencer 81.
  • MOS- FET 113 When MOS- FET 113 is conducting. the capacitor 114, which may have a capacity value of twenty pico farads, becomes charged very rapidly because of the very small capacitance. Specifically it will charge to the desired value in nanoseconds or less. But being of a small capacity value the capacitor 114 likewise tends to discharge rapidly as well. During the time that capacitor 114 is being charged the switch 115 is open, or inactivated.
  • the switch 115 becomes activated, i.e., closed, and the voltage stored on capacitor 114 is fed to amplifier 116 which amplifies it and supplies it in turn to a much larger capacitor 117 having a capacity value of about twotenths microfarad. This value of capacity is suffi cient for capacitor 117 to hold the voltage stored thereon and thus on conductor 55 until the switch 59 can operate and feed the voltage to the comparing circuit 66 as has been described.
  • the time for turning on, or activating, the MOSFET device 113 may be 2 nanoseconds, the device remains turned on for sixteen nanoseconds and about two nanoseconds are required for turning it off, or inactivating it. A total time of about twenty nanoseconds is thus taken for this operation. No later than at the end of this time interval and, in any event, before the charge on capacitor 114 has an opportunity to leak off to any significant extent, the solid-state switch is activated by a voltage pulse at conductor 115A supplied from sequencc 81 and the charge transferred through amplifier 116 to the capacitor 117. After the MOSFET device 113 is inactivated any further signals which appear on conductor 46 are ignored and do not influence the subsequent operation.
  • FIG. 7 there is shown a simplified timing diagram applicable to the described circuit.
  • the interval between 0 seconds and 0.001 seconds applies to switch 32, the sample and hold 51 and the related circuitry
  • the interval between 0.00l seconds and 0.002 seconds applies to the switch 33, the sample and hold 52 and the related circuitry.
  • the interval between 0.002 second and 0.003 second applies to the switch 34, the sample and hold 53 and the related circuitry
  • the interval between 0.003 second and 0.004 second applies to the switch 35, the sample and hold 54 and the related circuitry. That is, each of the switches 32-35 is open for 0.001 second in succession, the timing intervals being controlled by the sequencer 81 and being indicated by the pulses 123, 124, and 126 respectively.
  • each of the intervals 123-126 there is shown one of the pulses 127, 128, 129 and 131, respectively.
  • the pulses I27, 128, 129 and 131 corre spond to the received pulses 15 of FIG. 1 or the compressed pulses 106 and 106A of FIGS. 3 and 5.
  • the sequencer 81 supplies a control signal over conductor 92 which appears as pulse 132 (FIG. 7).
  • the pulses 132 activate the switches 59, 61, 62 and 63 whereby the voltages ex' isting on the capacitors 117 etc. are passed to the comparators 66 and 69 for comparison of the azimuth and elevation signals following which the differences are supplied through conductors 71 and 73 to the integrators 72 and 74 for passage to the elevational control and azimuth control as previously indicated.
  • the threshold detector 102 may be of any well'known type which is amplitude sensitive and determines when a signal of appropriate value. namely that of threshold value 11] is received.
  • the received pulses l5 and 19 (FIG. 1) either singly or as a composite will have sufficient amplitude for the threshold value of 1 ll to be exceeded.
  • These pulses are exemplified by the pulses 127, 128, 129 and [SI of the timing diagram FIG. 7.
  • the various sample and hold circuits function and voltages are stored on the capacitors 114 and 117 in each of the channels. Referring to FIG.
  • interval D the sequencer deactivates or turns off the MOSFET 113 and any signals of whatever amplitude thereafter do not get into the circuit and do not influence the result.
  • the signals are cut off.
  • this signal has no influence because it has occurred more than ten nanoseconds after cut off.
  • the same phenomenon takes place during each of the subsequent intervals namely during the pulses 124, 125 and 126.
  • four measurements, or pulses are received, two of which are utilized to energize the elevational control and the remaining two are utilized to energize the azimuth control.
  • An ordinary bomb at its terminal velocity may be moving in the vicinity of eight hundred feet per second and to direct its course effectively the control of its azimuthal and elevational surfaces need be updated only about once every second or thereabouts.
  • signals are received by the circuit and processed, and an appropriate value is entered in the integrating circuits 72 and 74 for utilization as an average to alter the control surfaces.
  • pulse compression filter of one particular type has been shown to lower peak power requirements and provide narrow pulses in the receiver for resolution.
  • other types of pulse compression could be devised or not employed at all without departing from the spirit and scope of the system of this disclosure.
  • a control system for guiding an object in azimuth and elevation toward a radiating target comprising:
  • a series ofsensors adapted to be disposed on such object for receiving such radiation and being adapted for determining azimuthal and elevational information
  • each one of said first series of switches including means for setting the on and off condition of the respective switch
  • each one of said series of sample and hold means including means for setting the on and off condition of the respective sample and hold means
  • each one of said second series offast acting switches including means for setting the on and off condition of the respective switch
  • sequencing means connected to the setting means of said first series of fast acting switches and to the setting means of said sample and hold means for simultaneously and sequentially turning on and off related ones of said first series of fast acting switches and said sample and hold means;
  • said sequencing means further being connected to the setting means of said second series of fast acting switches for sequentially initiating comparison in said azimuth signal comparator of said azimuth signals and in said elevation signal comparator of said elevation signals;
  • pulse compression means comprises acoustic surface wave transducing means.
  • each of said sample and hold means comprises a fast sample and hold means and a slow sample and hold means in series.
  • control system including signal threshold detecting means for said fast sample and hold means.
  • the fast sample and hold means comprises a field-effect transistor and a capacitor, said field-effect transistor being turned on and off by said sequencing means.
  • a control system for guiding an object in azimuth and elevation toward a radiating target comprising:
  • each one of said first series of switches including means for setting the on and off condition of the respective switch
  • each one of said series of pulse discriminating means including means for setting the on and off condition of the respective pulse discriminating means
  • each one of said second series of fast acting switches including means for setting the on and off condition of the respective switch
  • sequencing means connected to the setting means of said first series of fast acting switches and to the setting means of said pulse discriminating means for simultaneously and sequentially turning on and off related ones of said first series of fast acting switches and said sample and hold means;
  • said sequencing means further being connected to the setting means of said second series of fast acting switches for sequentially initiating comparison in said azimuth signal comparator of said azimuth signals and in said elevation signal comparator of said elevation signals;
  • a control system for guiding an object in azimuth and elevation toward a radiating target comprising;
  • a processing circuit for the signals from said sensors including pulse compression means.
  • each one of said first series of switches including means for setting on and off condition of the respective switch
  • each one of said series of sample and hold means including means for setting the on and off condition of the respective sample and hold means
  • each one of said second series of fast acting switches including means for setting the on and off condition of the respective switch
  • sequencing means connected to the setting means of said first series of fast acting switches and to the setting means of said sample and hold means for simultaneously and sequentially turning on and off related ones of said first series of fast acting switches and, in response to said signal threshold detecting means, said sample and hold means;
  • said sequencing means further being connected to the setting means of said second series of fast acting switches for sequentially initiating comparison in said azimuth signal comparator of said azimuth signals and in said elevation signal comparator of said elevation signals,
  • said series of sensors comprises two wide beam elevational information sensing antennas and two wide beam azimuthal information sensing antennas disposed in quadrature relative to each other on the front of said object;
  • a control system for guiding an object in azimuth and elevation toward a radiating target comprising;
  • control system including means for improving the signal to raise ratio of the signals on said sensors;

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
US291106A 1972-09-21 1972-09-21 Weapon delivery system Expired - Lifetime US3897917A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US291106A US3897917A (en) 1972-09-21 1972-09-21 Weapon delivery system
GB3288373A GB1411027A (en) 1972-09-21 1973-07-10 Object guidance system
GB13974A GB1411028A (en) 1972-09-21 1973-07-10 Fast response sample and hold circuit
IT51497/73A IT991986B (it) 1972-09-21 1973-07-16 Perfezionamento nei sistemi di guida per bombe missili e simili
IL43100A IL43100A0 (en) 1972-09-21 1973-08-29 Missiles guide system
DE19732347460 DE2347460A1 (de) 1972-09-21 1973-09-20 Waffenleitsystem
JP48106096A JPS4970398A (it) 1972-09-21 1973-09-21

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US291106A US3897917A (en) 1972-09-21 1972-09-21 Weapon delivery system

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US3897917A true US3897917A (en) 1975-08-05

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JP (1) JPS4970398A (it)
DE (1) DE2347460A1 (it)
GB (2) GB1411028A (it)
IL (1) IL43100A0 (it)
IT (1) IT991986B (it)

Cited By (5)

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US4800388A (en) * 1985-02-06 1989-01-24 Tokyo Keiki Company, Ltd. Apparatus for measuring pulse compression ratio
US4950076A (en) * 1976-09-14 1990-08-21 The United States Of America As Represented By The Secretary Of The Navy Alternate approach for obtaining dynamic range in monopulse guidance systems
US4991794A (en) * 1988-01-29 1991-02-12 The Marconi Company Limited Radar seeker transient suppressor
US5160934A (en) * 1984-08-27 1992-11-03 The United States Of America As Represented By The Secretary Of The Navy Cross-switched MICRAD seeker
US20060170903A1 (en) * 2005-01-30 2006-08-03 Rafael-Armament Development Authority Ltd. Rangefinder

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GB2157519A (en) * 1984-04-14 1985-10-23 Coorosh Sabet A sample and hold circuit
GB2246041B (en) * 1990-07-10 1994-11-09 Gec Ferranti Defence Syst A radio direction finding system

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US3720131A (en) * 1971-01-28 1973-03-13 Hughes Aircraft Co Built-in test for tank fire control computer

Patent Citations (1)

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Cited By (5)

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US5160934A (en) * 1984-08-27 1992-11-03 The United States Of America As Represented By The Secretary Of The Navy Cross-switched MICRAD seeker
US4800388A (en) * 1985-02-06 1989-01-24 Tokyo Keiki Company, Ltd. Apparatus for measuring pulse compression ratio
US4991794A (en) * 1988-01-29 1991-02-12 The Marconi Company Limited Radar seeker transient suppressor
US20060170903A1 (en) * 2005-01-30 2006-08-03 Rafael-Armament Development Authority Ltd. Rangefinder

Also Published As

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JPS4970398A (it) 1974-07-08
GB1411028A (en) 1975-10-22
DE2347460A1 (de) 1974-04-04
IL43100A0 (en) 1974-07-31
GB1411027A (en) 1975-10-22
IT991986B (it) 1975-08-30

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