GB1421328A - Automatic control systems and methods - Google Patents

Automatic control systems and methods

Info

Publication number
GB1421328A
GB1421328A GB2487572A GB2487572A GB1421328A GB 1421328 A GB1421328 A GB 1421328A GB 2487572 A GB2487572 A GB 2487572A GB 2487572 A GB2487572 A GB 2487572A GB 1421328 A GB1421328 A GB 1421328A
Authority
GB
United Kingdom
Prior art keywords
counter
adder
stage
sets
control
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
GB2487572A
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 GB2487572A priority Critical patent/GB1421328A/en
Priority to AU55982/73A priority patent/AU5598273A/en
Priority to NL7307166A priority patent/NL7307166A/xx
Priority to CH741473A priority patent/CH587518A5/xx
Priority to JP5849673A priority patent/JPS4943072A/ja
Priority to IT2467573A priority patent/IT990588B/en
Priority to DE19732327010 priority patent/DE2327010A1/en
Priority to FR7319335A priority patent/FR2189787B3/fr
Publication of GB1421328A publication Critical patent/GB1421328A/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
    • G05B19/27—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 absolute digital measuring device
    • 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
    • G05B2219/33—Director till display
    • G05B2219/33268—D-A, A-D

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

1421328 Automatic control ALFRED HERBERT Ltd 1 May 1973 [26 May 1972] 24875/72 Heading G3N A servo-control system responsive to a binary demand signal representing a change in value of a controlled variable comprises a control means controlling the transfer of data to a counting means the contents of which is up-dated to provide a binary error signal to a servo means. As shown the position of a machine tool element 10 is determined by a transducer 12 and output pulses indicative of extent and direction of movement, are fed from a unit 14, and selectively passed by gates 20, 21 to up/down inputs of an error counter 24. A demand position from a computer 26 is fed to a parallel adder 28 which in co-operation with the counter 24 provides an error signal on a line 30 which through a D/A converter 70 control a servosystem comprising an amplifier 74, a servovalve 76, and a loadpositioning ram 78; acceleration feedback is provided by a transducer 80. Each new demand value is preceded by an address which is detected by a NAND gate 34, which, via a clocked AND gate 36 sets a bi-stable circuit 38. The 1 output from the circuit 38 closes gates 20, 21 and sets a first stage 40A of a shift register 40 control data transfer between counter 24 and adder 28. The stage 40A opens a gate 46 to allow the least significant digits in counter 24 to be added to the demand value in adder 28. A clockpulse sets the 1 signal in stage 40B and opens control gates 52, 56 whereby the least significant digits in adder 28 are set in the counter 24 and the most significant digits in counter 24 added to the demand value in adder 28 together with the carry from the previous operation. The next clockpulse sets stage 40C to open gate 62 and transfer the most significant digits of adder 28 into the counter 24. The subsequent clockpulse sets stage 40D which opens gates 20, 21 and resets bi-stable 38. The count is store 24 being presented on line 30 as a binary position-error signal.
GB2487572A 1972-05-26 1972-05-26 Automatic control systems and methods Expired GB1421328A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
GB2487572A GB1421328A (en) 1972-05-26 1972-05-26 Automatic control systems and methods
AU55982/73A AU5598273A (en) 1972-05-26 1973-05-22 Automatic control systems and methods
NL7307166A NL7307166A (en) 1972-05-26 1973-05-22
CH741473A CH587518A5 (en) 1972-05-26 1973-05-24
JP5849673A JPS4943072A (en) 1972-05-26 1973-05-25
IT2467573A IT990588B (en) 1972-05-26 1973-05-25 AUTOMATIC CONTROL SYSTEM INCLUDING A DIGITAL COMPUTER
DE19732327010 DE2327010A1 (en) 1972-05-26 1973-05-26 AUTOMATIC CONTROL CIRCUITS AND PROCEDURES
FR7319335A FR2189787B3 (en) 1972-05-26 1973-05-28

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2487572A GB1421328A (en) 1972-05-26 1972-05-26 Automatic control systems and methods

Publications (1)

Publication Number Publication Date
GB1421328A true GB1421328A (en) 1976-01-14

Family

ID=10218643

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2487572A Expired GB1421328A (en) 1972-05-26 1972-05-26 Automatic control systems and methods

Country Status (1)

Country Link
GB (1) GB1421328A (en)

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Legal Events

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