Title :
On-line diagnostics of a variable displacement pump of a flight actuation system
Author :
Skormin, Victor A. ; Apone, Joseph
Author_Institution :
Watson Sch. of Eng., Binghamton Univ., NY, USA
Abstract :
An on-line diagnostic system for a variable displacement pump, serving as a part of a self-contained flight actuator, is presented. A mathematical model describing dynamics of the pump, driving a control surface of an aircraft, is established. Typical pump failures are defined through the model parameters in the form of a failure pattern library. A diagnostic model, intentionally sensitive to particular failures, is defined. A diagnostic procedure, featuring on-line parameter estimation of the mathematical model, failure detection and identification is developed. A failure prediction procedure, detecting and utilizing trends exhibited by parameter estimates is formulated. The results are verified by computer simulation
Keywords :
actuators; aircraft; aircraft control; automatic test equipment; digital simulation; fault diagnosis; parameter estimation; pumps; reliability; computer simulation; diagnostic model; dynamics; failure pattern library; failure prediction; flight actuation; hydraulic pump failures; identification; leakage; mathematical model; model parameters; online diagnostics; online parameter estimation; self-contained flight actuator; variable displacement pump; Actuators; Aerospace control; Aircraft; Computer simulation; Hydraulic actuators; Hydraulic systems; Libraries; Mathematical model; Parameter estimation; Pistons; Redundancy;
Conference_Titel :
Aerospace and Electronics Conference, 1995. NAECON 1995., Proceedings of the IEEE 1995 National
Conference_Location :
Dayton, OH
Print_ISBN :
0-7803-2666-0
DOI :
10.1109/NAECON.1995.521985
