GB1309711A - Control systems and methods - Google Patents

Control systems and methods

Info

Publication number
GB1309711A
GB1309711A GB1587071*[A GB1587071A GB1309711A GB 1309711 A GB1309711 A GB 1309711A GB 1587071 A GB1587071 A GB 1587071A GB 1309711 A GB1309711 A GB 1309711A
Authority
GB
United Kingdom
Prior art keywords
circuit
engine
gate
speed
counter
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
GB1587071*[A
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.)
Chandler Evans Inc
Original Assignee
Chandler Evans Inc
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 Chandler Evans Inc filed Critical Chandler Evans Inc
Publication of GB1309711A publication Critical patent/GB1309711A/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
    • G05B1/00—Comparing elements, i.e. elements for effecting comparison directly or indirectly between a desired value and existing or anticipated values
    • G05B1/01—Comparing elements, i.e. elements for effecting comparison directly or indirectly between a desired value and existing or anticipated values electric
    • G05B1/03—Comparing elements, i.e. elements for effecting comparison directly or indirectly between a desired value and existing or anticipated values electric for comparing digital signals
    • 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
    • H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
    • H02P23/16—Controlling the angular speed of one shaft

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Power Engineering (AREA)
  • Feedback Control In General (AREA)
  • Control Of Velocity Or Acceleration (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

1309711 Automatic control of speed CHANDLER EVANS Inc 19 May 1971 [21 May 1970] 15870/71 Heading G3R The cyclic output of a tachometer connected to a combustion engine is fed to a circuit 10 producing an output pulse train having pulse width commensurate with the actual instantaneous speed of a rotating member of the engine. The pulse train enables an AND-gate 12 to pass a train of high frequency pulses from a clock source 14 to a digital counter 16 for a period inversely proportional to the actual speed of the engine. The counter is interrogated by a logic circuit 18 comprising decision gates which are enabled at binary numbers corresponding to specific speeds. The actual speed of the engine is thereby classified into three states above, below or within a predetermined deadband. Depending on the classification, a 'down' trim gate 20, or an 'up' trip gate 22 is enabled to pass a drive signal from a circuit 24 to an electromechanical control mechanism not shown, such as solenoids moving a fuel flow regulator. The circuit 10 comprises a filter, to remove noise, a squaring circuit for shaping the signal to a square wave and a bi-stable circuit responsive to the trailing edge of the square wave to generate a true 50% duty cycle. The output of the circuit 10 is modified to reset counter 16 and transfer the classified information to the trim gates. The clock source comprises a crystal oscillator and the clock frequency may be varied by selection from a plurality of oscillators or the adjustment of a variable frequency oscillator.
GB1587071*[A 1970-05-21 1971-05-19 Control systems and methods Expired GB1309711A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US3943170A 1970-05-21 1970-05-21

Publications (1)

Publication Number Publication Date
GB1309711A true GB1309711A (en) 1973-03-14

Family

ID=21905417

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1587071*[A Expired GB1309711A (en) 1970-05-21 1971-05-19 Control systems and methods

Country Status (4)

Country Link
US (1) US3651460A (en)
CA (1) CA936258A (en)
DE (1) DE2125093A1 (en)
GB (1) GB1309711A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2136164A (en) * 1983-03-01 1984-09-12 Aisin Seiki Automobile speed control systems

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3757750A (en) * 1970-09-17 1973-09-11 Diesel Kiki Co Electronic governor for injection-type internal combustion engines
US3724433A (en) * 1971-08-13 1973-04-03 Ambac Ind Engine governor system with signal-loss protection and controlled oscillator circuit suitable for use therein
US3766895A (en) * 1971-08-13 1973-10-23 Ambac Ind Electric speed control system and more-than-two-state phase detector suitable for use therein
US3889647A (en) * 1973-07-02 1975-06-17 Bendix Corp Speed governor for an engine having an electronic fuel injection system
US4321460A (en) * 1977-01-03 1982-03-23 Lanier Business Products, Inc. Digital control apparatus
US4393845A (en) * 1978-04-03 1983-07-19 The Bendix Corporation Means for improving the efficiency of an internal combustion engine
DE2816879C2 (en) * 1978-04-18 1986-11-20 German Ing.(Grad.) 8060 Dachau Grimm Circuit for frequency control in electrical power distribution networks
EP0236685B1 (en) * 1986-02-11 1991-09-04 Studer Revox Ag Method and device to control the number of revolutions of an electric motor operating in four quadrants
US6674962B2 (en) 2002-01-29 2004-01-06 Siemens Vdo Automotive, Inc. Limited-pool random frequency for DC brush motor low frequency PWM speed control
DE102006030520B3 (en) * 2006-07-01 2007-06-21 Dräger Medical AG & Co. KG Respiratory gas supplying device for patient, has control device that is provided for controlling inspiration pressure based on pulmonary inner pressure and pulmonary target pressure

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3246249A (en) * 1962-03-09 1966-04-12 Philco Corp Programmable digital high and low limit detector system
BE631130A (en) * 1962-05-01 1900-01-01
US3176208A (en) * 1962-07-02 1965-03-30 North American Aviation Inc Phase locking control device
US3281607A (en) * 1963-08-29 1966-10-25 Int Resistance Co Nand nor logic circuit for use in a binary comparator
US3420989A (en) * 1965-07-16 1969-01-07 Us Navy Synchronizer for digital counters
GB1099928A (en) * 1965-07-26 1968-01-17 Ici Ltd Speed detection
US3437894A (en) * 1966-03-29 1969-04-08 Us Navy Multiple speed servomechanism drive system for positioning an antenna in direct response to digital signals
US3525044A (en) * 1968-02-28 1970-08-18 Vapor Corp Digital speed and control system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2136164A (en) * 1983-03-01 1984-09-12 Aisin Seiki Automobile speed control systems

Also Published As

Publication number Publication date
CA936258A (en) 1973-10-30
US3651460A (en) 1972-03-21
DE2125093A1 (en) 1971-12-02

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees