GB673379A - Safety devices for electric automatic control systems - Google Patents

Safety devices for electric automatic control systems

Info

Publication number
GB673379A
GB673379A GB22598/49A GB2259849A GB673379A GB 673379 A GB673379 A GB 673379A GB 22598/49 A GB22598/49 A GB 22598/49A GB 2259849 A GB2259849 A GB 2259849A GB 673379 A GB673379 A GB 673379A
Authority
GB
United Kingdom
Prior art keywords
signal
servomotor
rudder
servo
control systems
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
GB22598/49A
Inventor
Frederick Roger Milsom
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.)
FURZEHILL LAB Ltd
S Smith and Sons Ltd
S Smith and Sons England Ltd
Original Assignee
FURZEHILL LAB Ltd
S Smith and Sons Ltd
S Smith and Sons England Ltd
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
Application filed by FURZEHILL LAB Ltd, S Smith and Sons Ltd, S Smith and Sons England Ltd filed Critical FURZEHILL LAB Ltd
Priority to GB22598/49A priority Critical patent/GB673379A/en
Publication of GB673379A publication Critical patent/GB673379A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G05D1/0055—Control of position, course, altitude or attitude of land, water, air or space vehicles, e.g. using automatic pilots with safety arrangements

Landscapes

  • 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)
  • Gyroscopes (AREA)

Abstract

673,379. Automatic servo control systems. SMITH & SONS (ENGLAND), Ltd., S., and FURZEHILL LABORATORIES, Ltd. Nov. 28, 1950 [Aug. 31, 1949], No. 22598/49. Class 38 (iv). In a servo control system for an automatic pilot a testing signal having a signal frequency higher than that to which the servomotor can respond (e.g. 40 c.p.s.) is injected in series with the deviation signal, and its magnitude and phase are checked at the motor terminals to detect any fault in the servo amplifier. As applied to an automatic pilot such as that described in Specification 611,037, wherein the rudder 9 is controlled by signals from a compass 2, rate of turn gyro 1, and speed of rudder displacement generator 5, a testing signal from a modulator 21 is also injected into the amplifier 3. The modulator is fed from a 400-cycle source 25 (common to the other units of the servo system) and modulated at the test frequency by an oscillator 20. The signal at the servomotor terminals is demodulated and filtered to remove any control signals, and then compared with the original test frequency in a demodulator 24 to produce a D.C. output dependent on its amplitude and phase. This output is fed to a polarized relay 17 controlling the clutch 6 between the servomotor and the rudder.
GB22598/49A 1949-08-31 1949-08-31 Safety devices for electric automatic control systems Expired GB673379A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB22598/49A GB673379A (en) 1949-08-31 1949-08-31 Safety devices for electric automatic control systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB22598/49A GB673379A (en) 1949-08-31 1949-08-31 Safety devices for electric automatic control systems

Publications (1)

Publication Number Publication Date
GB673379A true GB673379A (en) 1952-06-04

Family

ID=10182038

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22598/49A Expired GB673379A (en) 1949-08-31 1949-08-31 Safety devices for electric automatic control systems

Country Status (1)

Country Link
GB (1) GB673379A (en)

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