GB1433869A - Automatic servo control systems and methods for position control - Google Patents

Automatic servo control systems and methods for position control

Info

Publication number
GB1433869A
GB1433869A GB3365475A GB3365475A GB1433869A GB 1433869 A GB1433869 A GB 1433869A GB 3365475 A GB3365475 A GB 3365475A GB 3365475 A GB3365475 A GB 3365475A GB 1433869 A GB1433869 A GB 1433869A
Authority
GB
United Kingdom
Prior art keywords
counter
acceleration
mode
deceleration
content
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
GB3365475A
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.)
HERBERT Ltd ALFRED
Original Assignee
HERBERT Ltd ALFRED
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 HERBERT Ltd ALFRED filed Critical HERBERT Ltd ALFRED
Priority to GB3365475A priority Critical patent/GB1433869A/en
Publication of GB1433869A publication Critical patent/GB1433869A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/19—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path
    • G05B19/21—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path using an incremental digital measuring device
    • G05B19/23—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path using an incremental digital measuring device for point-to-point control
    • G05B19/231—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path using an incremental digital measuring device for point-to-point control the positional error is used to control continuously the servomotor according to its magnitude
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/43—Speed, acceleration, deceleration control ADC
    • G05B2219/43006—Acceleration, deceleration control

Landscapes

  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Position Or Direction (AREA)

Abstract

1433869 Servo-positioning ALFRED HERBERT Ltd 1 May 1973 [6 May 1972] 33654/75 Divided out of 1433868 Heading G3N In a servo-control system, altering the position of a controlled member (tool of machine tool) towards a demanded position, increments of motion during a member acceleration phase are counted twice, those during member motion at constant speed being counted once, deceleration; at a rate equal in magnitude to the acceleration; to the demanded position being initiated when the total counted number of increments equals a stored value equal to the number of increments between an initial, and the demanded, member positions. Control arrangement, Fig. 1. Servo unit 30 operates either in acceleration, or deceleration, modes, of mutually equal magnitude, or in a constant speed mode, AND gate 72 being opened for the acceleration mode, AND gate 74 for the constant speed mode. Upon any change in the demand signal, the error signal immediately after such change is gated in inverted form into counter 60 whose content thus represents in negative form the distance to go to the demanded position. In the acceleration mode of the servo unit 30, in virtue of multiplier 76, counter 60 is counted up at twice the rate per unit increment of actual motion in comparison with the rate for the constant speed mode of the unit 30. When the content of counter 60 reaches zero, the unit 30 is switched to the ramp down mode, at the required distance in advance of the required destination position in view of the equal magnitude of the acceleration and deceleration. For two, or three dimensional member motion, a single counter is set initially with its content representing the sum of the moduli of movement increments for each of the axes, and the position transducer of a servosystem corresponding to each dimension provides signals changing the counter content. All servos switch to the deceleration mode when the counter content reaches zero. Control functions may be exercised by a micro-programmed computer.
GB3365475A 1972-05-06 1972-05-06 Automatic servo control systems and methods for position control Expired GB1433869A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3365475A GB1433869A (en) 1972-05-06 1972-05-06 Automatic servo control systems and methods for position control

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3365475A GB1433869A (en) 1972-05-06 1972-05-06 Automatic servo control systems and methods for position control

Publications (1)

Publication Number Publication Date
GB1433869A true GB1433869A (en) 1976-04-28

Family

ID=10355715

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3365475A Expired GB1433869A (en) 1972-05-06 1972-05-06 Automatic servo control systems and methods for position control

Country Status (1)

Country Link
GB (1) GB1433869A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0258641A2 (en) * 1986-08-01 1988-03-09 Litton Industrial Automation Systems, Inc. Velocity servo with position error correction

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0258641A2 (en) * 1986-08-01 1988-03-09 Litton Industrial Automation Systems, Inc. Velocity servo with position error correction
EP0258641A3 (en) * 1986-08-01 1988-12-14 Litton Industrial Automation Systems, Inc. Velocity servo with position error correction

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee