EP 0848844 A1 19980624 - PROCESS FOR AUTOMATICALLY CONTROLLING A SERVO-VALVE WITH CONTROLLABLE DELIVERY AND PRESSURE
Title (en)
PROCESS FOR AUTOMATICALLY CONTROLLING A SERVO-VALVE WITH CONTROLLABLE DELIVERY AND PRESSURE
Title (de)
SERVOSTEUERUNGSVERFAHREN EINES SERVOVENTILS WELCHES ZUR STEUERUNG VON DURCHFLUSSUND DRUCK GEEIGNET IST
Title (fr)
PROCEDE D'ASSERVISSEMENT D'UNE SERVOVALVE POUVANT ETRE ASSERVIE EN DEBIT ET EN PRESSION
Publication
Application
Priority
- FR 9601374 W 19960906
- FR 9510535 A 19950908
Abstract (en)
[origin: WO9709663A1] The invention concerns a process for automatically controlling a hydraulic servo-valve with a hydraulic slide valve (1) which is displaced by a rotary actuator (12). The process involves a first loop (2, 5, 11, 12, 4) for automatically controlling the delivery as a function of the measurement of the angular position of the rotary actuator, and a second automatic control loop (1, 3, 6, 21, 22, 23, 11, 12, 4, 2) with variable control as a function of the pressure measurement. The invention is characterized in that the first automatic control loop is a proportional action loop whose increase (Kpa) is constant for values of the absolute pressure difference value ( epsilon p) which are less than at least a threshold value, then varies in an increasing manner for values of the absolute pressure difference value ( epsilon p) which are greater than this first threshold.
IPC 1-7
IPC 8 full level
G05D 16/20 (2006.01)
CPC (source: EP US)
G05D 16/202 (2013.01 - EP US); Y10T 137/0379 (2015.04 - EP US); Y10T 137/7761 (2015.04 - EP US)
Citation (search report)
See references of WO 9709663A1
Designated contracting state (EPC)
AT BE DE DK ES FR GB IT NL PT SE
DOCDB simple family (publication)
WO 9709663 A1 19970313; CA 2231340 A1 19970313; EP 0848844 A1 19980624; FR 2738613 A1 19970314; FR 2738613 B1 19971024; US 5915401 A 19990629
DOCDB simple family (application)
FR 9601374 W 19960906; CA 2231340 A 19960906; EP 96930228 A 19960906; FR 9510535 A 19950908; US 2925298 A 19980305