Title:
SYSTEM AND METHOD FOR HEATLH MONITORING OF SERVO-HYDRAULIC ACTUATORS
Document Type and Number:
WIPO Patent Application WO/2015/153727
Kind Code:
A3
Abstract:
A method of health monitoring of a hydraulic actuator includes sensing a first hydraulic fluid pressure at a first chamber of a hydraulic cylinder, the first chamber defined by a piston disposed in the cylinder and a first cylinder wall. The method further includes sensing a second hydraulic fluid pressure at a second chamber of the hydraulic cylinder, the second chamber defined by the piston and a second cylinder wall opposite the first cylinder wall. The pressures are summed to derive a pressure sum leakage estimate. An actual piston position in the hydraulic cylinder is determined and compared to an intended piston position to determine a positional error of the piston. A command-response error leakage estimate is derived from the positional error. The pressure sum leakage estimate and the command-response error leakage estimate are fused to determine an internal hydraulic fluid leakage in the hydraulic cylinder.
Inventors:
SMITH MATTHEW J (US)
KLODA JARED (US)
FRIEL JASON (US)
HETTLER ERIC (US)
KLODA JARED (US)
FRIEL JASON (US)
HETTLER ERIC (US)
Application Number:
PCT/US2015/023819
Publication Date:
November 26, 2015
Filing Date:
April 01, 2015
Export Citation:
Assignee:
SIKORSKY AIRCRAFT CORP (US)
International Classes:
G05B23/02
Foreign References:
| US20050022589A1 | 2005-02-03 | |||
| US20130276516A1 | 2013-10-24 | |||
| US7970583B2 | 2011-06-28 | |||
| US7827001B2 | 2010-11-02 |
Other References:
See also references of EP 3126920A4
Attorney, Agent or Firm:
WIMPE, James E. (20 Church Street 22nd FloorHartford, Connecticut, US)
Download PDF: