EP 0000261 A1 19790110 - Positioning system employing feedforward and feedback control.
Title (en)
Positioning system employing feedforward and feedback control.
Title (de)
Schaltung zur direkten und rückgekoppelten Steuerung einer Positioniereinrichtung.
Title (fr)
Agencement pour la commande directe et par contre-réaction d'un dispositif de positionnement.
Publication
Application
Priority
US 81135077 A 19770629
Abstract (en)
[origin: ES470846A1] A positioning system for moving a member between positions in time optimal fashion employs concurrent "feedforward" and "feedback" control. The feedforward control system provides major control and the feedback control system provides minor control to correct for deviations between the actual and a nominal system. The feedback loop may thus be of low bandwidth permitting desensitization to high frequency disturbances or the employment of inherently low bandwidth controlled variables. The "feedforward" control function includes successive portions of opposite polarity corresponding to acceleration and deceleration of the member and also includes a subtractive velocity related component. This function represents the approximate current input to an electromagnetic coil actuator of a nominal system required to move such a member between positions in time optimal fashion.
IPC 1-7
IPC 8 full level
G05B 13/00 (2006.01); G05B 11/36 (2006.01); G05B 13/02 (2006.01); G05B 19/23 (2006.01); G05D 3/12 (2006.01); G11B 5/55 (2006.01); G11B 21/08 (2006.01)
CPC (source: EP US)
G05B 19/232 (2013.01 - EP US); G11B 5/5547 (2013.01 - EP US); G05B 2219/41086 (2013.01 - EP US); G05B 2219/41355 (2013.01 - EP US); G05B 2219/41434 (2013.01 - EP US)
Citation (search report)
- US 4031443 A 19770621 - DROUX JACQUES PIERRE LEON, et al
- US 3881184 A 19750429 - KOEPCKE RICHARD WAYNE, et al
- US 4030132 A 19770614 - IFTIKAR SYED H, et al
- US 4006394 A 19770201 - CUDA JOHN, et al
- CONTROL ENGINEERING, May 1959, New York, R.L. DUTHIE "Feed forward can improve feedback controls", pages 136 to 140.
Designated contracting state (EPC)
BE CH DE FR GB NL SE
DOCDB simple family (publication)
EP 0000261 A1 19790110; EP 0000261 B1 19811007; AU 3483578 A 19791011; AU 511484 B2 19800821; BR 7804158 A 19790410; CA 1100609 A 19810505; DE 2861129 D1 19811217; ES 470846 A1 19790201; IT 1111180 B 19860113; IT 7823829 A0 19780526; JP S5412082 A 19790129; US 4200827 A 19800429
DOCDB simple family (application)
EP 78300061 A 19780621; AU 3483578 A 19780406; BR 7804158 A 19780629; CA 300244 A 19780331; DE 2861129 T 19780621; ES 470846 A 19780616; IT 2382978 A 19780526; JP 6180978 A 19780525; US 81135077 A 19770629