GB1451371A - Follow-up servo systems - Google Patents
Follow-up servo systemsInfo
- Publication number
- GB1451371A GB1451371A GB4564673A GB4564673A GB1451371A GB 1451371 A GB1451371 A GB 1451371A GB 4564673 A GB4564673 A GB 4564673A GB 4564673 A GB4564673 A GB 4564673A GB 1451371 A GB1451371 A GB 1451371A
- Authority
- GB
- United Kingdom
- Prior art keywords
- clutch
- signal
- amplifier
- value
- touching
- 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
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D3/00—Control of position or direction
- G05D3/12—Control of position or direction using feedback
- G05D3/14—Control of position or direction using feedback using an analogue comparing device
- G05D3/18—Control of position or direction using feedback using an analogue comparing device delivering a series of pulses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D48/00—External control of clutches
- F16D48/06—Control by electric or electronic means, e.g. of fluid pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D48/00—External control of clutches
- F16D48/06—Control by electric or electronic means, e.g. of fluid pressure
- F16D48/066—Control of fluid pressure, e.g. using an accumulator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/02—Clutches
- B60W2710/021—Clutch engagement state
- B60W2710/022—Clutch actuator position
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/30—Signal inputs
- F16D2500/302—Signal inputs from the actuator
- F16D2500/3026—Stroke
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/30—Signal inputs
- F16D2500/304—Signal inputs from the clutch
- F16D2500/30401—On-off signal indicating the engage or disengaged position of the clutch
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/50—Problem to be solved by the control system
- F16D2500/502—Relating the clutch
- F16D2500/50245—Calibration or recalibration of the clutch touch-point
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/70—Details about the implementation of the control system
- F16D2500/706—Strategy of control
- F16D2500/70605—Adaptive correction; Modifying control system parameters, e.g. gains, constants, look-up tables
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/70—Details about the implementation of the control system
- F16D2500/706—Strategy of control
- F16D2500/7061—Feed-back
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/70—Details about the implementation of the control system
- F16D2500/706—Strategy of control
- F16D2500/70668—Signal filtering
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2500/00—External control of clutches by electric or electronic means
- F16D2500/70—Details about the implementation of the control system
- F16D2500/71—Actions
- F16D2500/7107—Others
- F16D2500/7109—Pulsed signal; Generating or processing pulsed signals; PWM, width modulation, frequency or amplitude modulation
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
1451371 Clutch control FERRANTI Ltd 27 Sept 1974 [29 Sept 1973] 45646/73 Heading F2L [Also in Division G3] In the control of a mechanical friction clutch by means of a follow-up servo system, a stored value JT representing the axial position of the movable clutch part corresponding to the just touching disposition of the mating surfaces is combined with a demand signal representing a desired position between just touching, and fully engaged, FE positions, the resultant being compared with the actual position to derive an error signal controlling an actuator which moves the movable part to null the error signal. The value JT is periodically updated during clutch usage, to correspond to the changing just touching position, due to wear. The clutch is used in a vehicle, in which case the demand signal is derived from the vehicle throttle setting, or in a machine tool. Digital servo arrangement, Fig. 1.-Store 17 contains a preset quantity, appropriate to the clutch being controlled, representing the displacement JT/FE between the just touching and fully engaged positions. Electronic switch 13 being closed whenever the clutch is fully engaged, electronic switch 14 operates periodieally to provide to counter 16 via A/D converter 15 a pulse train representing the fully engaged position FE, which is combined with the value JT/FE to provide the current just touching position JT for storage in unit 21. The stored value is transferred, whenever the clutch is in the fully disengaged position FD, to counter 23, where it is additively combined with the A/D converted throttle position signal TP; the conversion being such that a null digital output is provided until 15% of throttle opening is is reached: to provide the demand signal TP + JT fed to comparator 31 also receiving the actual position signal from A/D converter 33, the resultant error being fed to actuator system 35. Between positions JT and FE, the movable part is vibrated about a mean position corresponding to servo actual position, and switches 26 and 32 are closed at the beginning of each vibration cycle for a small proportion of the cycle. Analogue servo arrangement, Figs. 4, 6 (not shown).-The digitally stored value JT is converted to analogue form in D/A converter (61) and passed to amplifier (62) having a further input coupled to constant current source (64) resistor (63) being set to provide an analogue equivalent of the value JT/FE, the amplifier output, fed to throttle potentiometer (65) representing the value FE. The analogue signal JT is also connected via amplifier (66) to the potentiometer, ensuring that the signal on line (67), corresponding to the throttle position, varies between levels corresponding to JT, and FE, the signal on line (67) is fed to comparator amplifier (71) receiving also the actual position signal from wiper (12). A further potentiometer (81, Fig. 6) with a wiper (82) preset to 15% throttle opening may be provided, amplifier (83) connected thereto, and to the wiper (67) exerting over-riding control ensuring that the clutch remains fully disengaged until 15% throttle setting is exceeded. Actuator systems (1) digital, Figs. 2, 3 (not shown).-Between just touching, and fully engaged positions, the clutch is moved towards, resp. way from full engagement during the mark resp. space epochs of a variable mark/space ratio pulse waveform, of constant frequency determined by the capacity of counter (44) counted by clock pulses. Each zero crossing of the counter sets bi-stable (43) to initiate a mark phase, counter (41) being initially set, for each cycle to contain a value equal to half the capacity of counter (44), augmented or diminished as appropriate by the error signal value, and counted down to zero to initiate the space phase of the cycle. The pulse waveform passes to actuator (47) comprising a piston/cylinder moved in opposed senses by the mark resp. space phases of the waveform the mean position thus moving in accordance with the error signal to reduce it to zero. (ii) Analogue, Figs. 4, 6 (not shown). The analogue error signal form amplifier (71) is passed to amplifier (74), whose other input receives a sawtooth waveform from generator (73). The output of the amplifier (71) is a pulsed waveform of variable mark/space ratio controlling the clutch as in the digital case, change between mark and space epochs occurring at instants when the sawtooth waveform and error values are equal, see Fig. 5 (not shown). A single A/D converter, with timesharing, may be used instead of converters 15, 33 and 27.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4564673A GB1451371A (en) | 1973-09-29 | 1973-09-29 | Follow-up servo systems |
DE2445044A DE2445044C3 (en) | 1973-09-29 | 1974-09-20 | Servo circuitry |
US05/625,087 US4023660A (en) | 1973-09-29 | 1975-10-23 | Follow-up servo systems for clutches |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4564673A GB1451371A (en) | 1973-09-29 | 1973-09-29 | Follow-up servo systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1451371A true GB1451371A (en) | 1976-09-29 |
Family
ID=10438027
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4564673A Expired GB1451371A (en) | 1973-09-29 | 1973-09-29 | Follow-up servo systems |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE2445044C3 (en) |
GB (1) | GB1451371A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2509883A1 (en) * | 1981-07-18 | 1983-01-21 | Pierburg Gmbh & Co Kg | METHOD AND DEVICE FOR CONTROLLING A PNEUMATICALLY ACTUATED SERVOMOTOR |
US4561530A (en) * | 1982-08-11 | 1985-12-31 | Automotive Products Plc | Electronic clutch control system |
GB2170571A (en) * | 1985-01-31 | 1986-08-06 | Eaton Corp | Automatic clutch control |
GB2195735A (en) * | 1986-07-01 | 1988-04-13 | Diesel Kiki Co | Hydraulic actuator for automobiles |
GB2221969A (en) * | 1988-07-09 | 1990-02-21 | Fichtel & Sachs Ag | Arrangement for controlling an automatically actuated motor vehicle friction clutch in manoeuvring operation |
CN112363445A (en) * | 2020-10-30 | 2021-02-12 | 北京精密机电控制设备研究所 | Glass twister control system |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3010335C2 (en) * | 1980-03-18 | 1982-12-09 | Helmut 5600 Wuppertal Korthaus | Working method for an electromotive brake actuation device, in particular in rail vehicles, and device for carrying out the method |
DE3032558C2 (en) * | 1980-08-29 | 1987-01-02 | Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen | Logistic measuring device for clutches or brakes |
DE102007056767B4 (en) * | 2007-11-23 | 2009-11-26 | Gertrag Ford Transmissions Gmbh | Method for operating a pressure control valve of a pressure system for actuating a clutch |
WO2023213387A1 (en) * | 2022-05-04 | 2023-11-09 | Ka Group Ag | Method for determining a force transmission contact point of an electric clutch actuator |
-
1973
- 1973-09-29 GB GB4564673A patent/GB1451371A/en not_active Expired
-
1974
- 1974-09-20 DE DE2445044A patent/DE2445044C3/en not_active Expired
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2509883A1 (en) * | 1981-07-18 | 1983-01-21 | Pierburg Gmbh & Co Kg | METHOD AND DEVICE FOR CONTROLLING A PNEUMATICALLY ACTUATED SERVOMOTOR |
US4561530A (en) * | 1982-08-11 | 1985-12-31 | Automotive Products Plc | Electronic clutch control system |
GB2170571A (en) * | 1985-01-31 | 1986-08-06 | Eaton Corp | Automatic clutch control |
GB2195735A (en) * | 1986-07-01 | 1988-04-13 | Diesel Kiki Co | Hydraulic actuator for automobiles |
GB2195735B (en) * | 1986-07-01 | 1990-10-31 | Diesel Kiki Co | Hydraulic actuator for automobiles |
GB2221969A (en) * | 1988-07-09 | 1990-02-21 | Fichtel & Sachs Ag | Arrangement for controlling an automatically actuated motor vehicle friction clutch in manoeuvring operation |
GB2221969B (en) * | 1988-07-09 | 1992-07-22 | Fichtel & Sachs Ag | Arrangement for controlling an automatically actuated motor vehicle friction clutch in manoeuvring operation |
CN112363445A (en) * | 2020-10-30 | 2021-02-12 | 北京精密机电控制设备研究所 | Glass twister control system |
CN112363445B (en) * | 2020-10-30 | 2021-12-07 | 北京精密机电控制设备研究所 | Glass twister control system |
Also Published As
Publication number | Publication date |
---|---|
DE2445044A1 (en) | 1975-04-17 |
DE2445044C3 (en) | 1979-05-10 |
DE2445044B2 (en) | 1978-09-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |