Title:
AUTO-TUNING ELECTRO-HYDRAULIC VALVE
Document Type and Number:
WIPO Patent Application WO/2009/152355
Kind Code:
A3
Abstract:
A flow control valve includes a housing (16) that includes a fluid inlet (28), a fluid outlet (30) a first work port (32a) and a second work port (32b). The housing defines a spool bore and a pilot spool bore. A main stage spool is disposed in the spool bore. A pilot stage spool is disposed in the pilot spool bore. The pilot stage spool is in selective fluid communication with the main stage spool. A microprocessor includes a controller having a restricted structured controller and a compensation controller. Outputs of the restricted structured controller and the compensation controller are summed to form an electrical signal that is communicated to the pilot stage spool.
Inventors:
YUAN QINGHUI (US)
SCHOTTLER CHRIS (US)
GEHLOFF WADE (US)
SINGHANIA HONG (US)
SCHOTTLER CHRIS (US)
GEHLOFF WADE (US)
SINGHANIA HONG (US)
Application Number:
PCT/US2009/047073
Publication Date:
July 05, 2012
Filing Date:
June 11, 2009
Export Citation:
Assignee:
EATON CORP (US)
YUAN QINGHUI (US)
SCHOTTLER CHRIS (US)
GEHLOFF WADE (US)
SINGHANIA HONG (US)
YUAN QINGHUI (US)
SCHOTTLER CHRIS (US)
GEHLOFF WADE (US)
SINGHANIA HONG (US)
International Classes:
G05D7/06
Foreign References:
| US5303636A | 1994-04-19 |
Other References:
GRIMBLE M J ET AL: "Restricted structure adaptive predictive control of nonlinear systems", PROCEEDINGS OF THE 2002 IEEE INTERNATIONAL CONFERENCE ON CONTROL APPLICATIONS. CCA 2002. GLASCOW, SCOTLAND, U.K. , SEPT. 18 - 20, 2002; [IEEE INTERNATIONAL CONFERENCE ON CONTROL APPLICATIONS], NEW YORK, NY : IEEE, US, vol. 2, 18 September 2002 (2002-09-18), pages 663 - 668, XP010606052, ISBN: 978-0-7803-7386-0, DOI: 10.1109/CCA.2002.1038679
Attorney, Agent or Firm:
KOWALCHYK, Katherine, M. (P.O.Box 2903Minneapolis, MN, US)
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