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GB1134060A - Digital phase matching system - Google Patents

Digital phase matching system

Info

Publication number
GB1134060A
GB1134060A GB57470/66A GB5747066A GB1134060A GB 1134060 A GB1134060 A GB 1134060A GB 57470/66 A GB57470/66 A GB 57470/66A GB 5747066 A GB5747066 A GB 5747066A GB 1134060 A GB1134060 A GB 1134060A
Authority
GB
United Kingdom
Prior art keywords
pulse
train
phase
pulses
gates
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB57470/66A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Woodward Inc
Original Assignee
Woodward Governor Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US524260A external-priority patent/US3368108A/en
Priority claimed from US524315A external-priority patent/US3367110A/en
Application filed by Woodward Governor Co filed Critical Woodward Governor Co
Publication of GB1134060A publication Critical patent/GB1134060A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
    • B64C11/46—Arrangements of, or constructional features peculiar to, multiple propellers
    • B64C11/50—Phase synchronisation between multiple propellers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
    • H02P5/46—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors for speed regulation of two or more dynamo-electric motors in relation to one another
    • H02P5/52—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors for speed regulation of two or more dynamo-electric motors in relation to one another additionally providing control of relative angular displacement
    • H02P5/56—Speed and position comparison between the motors by electrical means

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Power Engineering (AREA)
  • Control Of Stepping Motors (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Control Of Velocity Or Acceleration (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

1,134,060. Phase discriminators. WOODWARD GOVERNER CO. 22 Dec., 1966 [1 Feb., 1966 (2)], No. 57470/66. Heading H3A. [Also in Division G3] The phase relationship of two pulse trains of substantially equal frequency is kept constant by a system in which each pulse in one train 100 triggers a one shot multivibrator 104 whose time constant is approximately half the interval between pulses and which has complementary outputs connected to AND gates 110, 111 to which the second pulse train 101 is also applied; thus, each pulse in the second train causes an output on one or the other of the AND gates according to whether it occurs in the first or second half of the period of the first train of pulses, and these outputs are arranged to advance or retard the phase of the second pulse train. The pulses are produced by generators 90, 94 driven by master and slave aircraft engines, one pulse per revolution, and connection is effected by a stepping servomotor Wi, Wd which adjusts the length of a throttle cable. The servomotor is also controlled by signals from the system for keeping the frequency relationship constant described in Specification 1,134,059 (see Division G3). As shown, the system includes an arrangement for creating a dead band of width " D " around the " in phase " condition which comprises a second one shot multivibrator 120 of time constant D whose output inhibits further AND gates 122, 124 so that adjusting signals are blocked. A delay of ¢D is interposed at 121 to centralize this dead band around the desired phase position.
GB57470/66A 1966-02-01 1966-12-22 Digital phase matching system Expired GB1134060A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US524260A US3368108A (en) 1966-02-01 1966-02-01 Digital synchronizing and phase matching system
US524315A US3367110A (en) 1966-02-01 1966-02-01 Digital synchronizing and phase matching system

Publications (1)

Publication Number Publication Date
GB1134060A true GB1134060A (en) 1968-11-20

Family

ID=27061438

Family Applications (2)

Application Number Title Priority Date Filing Date
GB57469/66A Expired GB1134059A (en) 1966-02-01 1966-12-22 Digital synchronising system
GB57470/66A Expired GB1134060A (en) 1966-02-01 1966-12-22 Digital phase matching system

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB57469/66A Expired GB1134059A (en) 1966-02-01 1966-12-22 Digital synchronising system

Country Status (2)

Country Link
DE (2) DE1588934C3 (en)
GB (2) GB1134059A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3152545A1 (en) * 1980-11-29 1983-06-30 Fuji Jukogyo K.K., Tokyo COMBUSTION ENGINE WITH SEVERAL MACHINE SETS

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9017889D0 (en) * 1990-08-15 1990-09-26 Gersan Ets Controlling a feed of objects

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3152545A1 (en) * 1980-11-29 1983-06-30 Fuji Jukogyo K.K., Tokyo COMBUSTION ENGINE WITH SEVERAL MACHINE SETS

Also Published As

Publication number Publication date
DE1588933C3 (en) 1975-06-12
DE1588934C3 (en) 1975-07-03
GB1134059A (en) 1968-11-20
DE1588934B2 (en) 1974-10-03
DE1588933B2 (en) 1974-10-03
DE1588933A1 (en) 1970-09-17
DE1588934A1 (en) 1970-09-17

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