GB754105A - Improvements in and relating to position-control systems - Google Patents

Improvements in and relating to position-control systems

Info

Publication number
GB754105A
GB754105A GB2901151A GB2901151A GB754105A GB 754105 A GB754105 A GB 754105A GB 2901151 A GB2901151 A GB 2901151A GB 2901151 A GB2901151 A GB 2901151A GB 754105 A GB754105 A GB 754105A
Authority
GB
United Kingdom
Prior art keywords
signal
error
fed
output
amplifier
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
GB2901151A
Inventor
John Clifford West
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.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
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 National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to GB2901151A priority Critical patent/GB754105A/en
Publication of GB754105A publication Critical patent/GB754105A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D3/00Control of position or direction
    • G05D3/12Control of position or direction using feedback
    • G05D3/14Control of position or direction using feedback using an analogue comparing device
    • G05D3/1445Control of position or direction using feedback using an analogue comparing device with a plurality of loops
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D3/00Control of position or direction
    • G05D3/12Control of position or direction using feedback
    • G05D3/14Control of position or direction using feedback using an analogue comparing device
    • G05D3/1427Control of position or direction using feedback using an analogue comparing device with non-linear amplifier chain

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Nonlinear Science (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

754,105. Electric follow-up systems. NATIONAL RESEARCH DEVELOPMENT CORPORATION. March 11, 1953 [Dec. 11, 1951], No. 29011/51. Class 40(1) [Also in Group XL(c)] In a position control system having a controlled element supplying a signal representing its instantaneous position to a mixing circuit to which is also fed a signal representing its required position the output of the mixer circuit which is a signal proportional to square root of error magnitude and of the same sign as the error, is applied together with a signal proportional to velocity of the element, to a high gain amplifier controlling the element, e.g. through a servomotor. The amplifier is saturated by low input signals and the servomotor therefore runs under full forward torque until the amplifier input becomes zero at a position midway between the initial and required positions of the element, when full reverse torque is applied to bring it to rest. The signal proportional to velocity is obtained from a tachometer generator or an equivalent signal proportional to the first derivative of error signal is produced by the anode follower circuit of Fig. 5. The square root signal is generated from the error signal in the circuit of Fig. 6 in which valves V1 1 and V1 2 are worked on non-linear parts of their characteristics to produce outputs proportional to the square roots of negative inputs while having positive input signals short circuited by diodes 6 and 7 respectively. V1 1 , fed directly with the error signal therefore gives an output only for negative error signals, while V1 2 which is fed through inverter V2 gives an output only for positive errors, which is inverted by V3 so that the input to mixer V4 changes in sign with the error. The output of V4 is inverted by V5 and amplified in variable gain amplifier V6, the output of which, together with the velocity dependent signal is fed to the servomotor controlling amplifier which saturates at low inputs. The invention may be used in the system described in Specification 750,294 in which the movable element carries a pick-up member close to a series of insulated segments to which are applied pulse signals intercollated in time. Because of capacity between the pick-up and segments a signal representing position is derived, which with signal predicting a desired position is fed to a circuit as shown in Fig. 6, the output of which is fed with a first derivative of error signal to a saturable amplifier supplying current to a coil on the element moving in a magnetic field. In this system the square root signal may be obtained by suitable shaping of the pickup member. Specification 687,520 [Group XXII] also is referred to.
GB2901151A 1951-12-11 1951-12-11 Improvements in and relating to position-control systems Expired GB754105A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2901151A GB754105A (en) 1951-12-11 1951-12-11 Improvements in and relating to position-control systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2901151A GB754105A (en) 1951-12-11 1951-12-11 Improvements in and relating to position-control systems

Publications (1)

Publication Number Publication Date
GB754105A true GB754105A (en) 1956-08-01

Family

ID=10284831

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2901151A Expired GB754105A (en) 1951-12-11 1951-12-11 Improvements in and relating to position-control systems

Country Status (1)

Country Link
GB (1) GB754105A (en)

Similar Documents

Publication Publication Date Title
GB1215251A (en) Improvements in or relating to process controllers
US2419812A (en) Servo mechanism circuits
GB1367266A (en) Ramp signal generator
US3673483A (en) Two-way drive for optical systems and the like
US4109190A (en) Circuit for increasing the operating speed range of a velocity servo system
GB754105A (en) Improvements in and relating to position-control systems
US3378739A (en) Servo amplifier including filter means for reducing response time
US3950683A (en) Motor control system having dead band control
GB610712A (en) Improvements in or relating to error signal control systems
US3751994A (en) Oscillatory signal system with turn on and turn off rate control
KR840009006A (en) Control Systems for Electro-Pneumatic Converters
US3095508A (en) Alternating current power control system
GB1342018A (en) Electric motor control systems
US2753505A (en) Servomechanism
GB1406852A (en) Corpuscular beam apparatus
US3405259A (en) Speed ordering devices utilizing comparator and integrator means
US3760253A (en) Two-way drive for optical systems and the like
GB1267260A (en)
US2434836A (en) Selsyn-controlled electric motor system
US3134060A (en) Servo motor control system
US2707255A (en) Chopper modulated electric motor servo amplifier
GB791054A (en) Improvements in electric control systems
US2844774A (en) Electrical follow-up system
GB585419A (en) Improvements in or relating to valve amplifiers
GB1412016A (en) Electrical control circuits