Results 81 to 90 of about 22,464 (227)
Accumulator isolator prevents malfunctioning of faulty hydraulic system [PDF]
, 1967 Special isolator valve prevents malfunction of a closed hydraulic system by converting the initial accumulator-reservoir to a reservoir function only when the system loses oil, or gaseous nitrogen precharge, or has a jammed piston.
Walsh, G. D.
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Measurement + ControlAccording to the unstable and nonlinear performances of the servo valve-controlled hydraulic motor, classical control methods based on linear theory are gradually unable to meet the high-performance requirements of the system.
Zhijie Duan +3 more
doaj +1 more source
Advances in Mechanical Engineering, 2016 Many multi-axle applications use electro-hydraulic control systems with proportional valves. The proportional steering system can satisfy common engineering requirements, but it is likely to fail if the steering angle or load changes drastically because ...
Heng Du, JianHua Wei, JinHui Fang
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Model-based Fault Diagnostics of Servo Valves
Annual Conference of the PHM Society, 2018 This paper presents the application of the Extended Phase Space Topology (EPST) method in model-based diagnostics of nonlinear systems. A detailed nonlinear mathematical model of a servo electro-hydraulic system has been used to demonstrate the procedure.
Turki Haj Mohamad +2 more
openaire +2 more sources
The load control system developed for the shuttle external structural tests is described. The system consists of a load programming/display module, and a load control module along with the following hydraulic system components: servo valves, dump valves,
Grosse, J. C.
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Model based control strategies for a class of nonlinear mechanical sub-systems [PDF]
, 2016 This paper presents a comparison between various control strategies for a class of mechanical actuators common in heavy-duty industry. Typical actuator components are hydraulic or pneumatic elements with static non-linearities, which are commonly ...
De Keyser, Robain +1 more
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Input-output linearization and fractional robust control of a non-linear system [PDF]
, 2001 This article deals with the association of a linear robust controller and an input-output linearization feedback for the control of a perturbed and non-linear system.
Lanusse, Patrick +3 more
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Mechanization of and experience with a triplex fly-by-wire backup control system [PDF]
A redundant three axis analog control system was designed and developed to back up a digital fly by wire control system for an F-8C airplane. The mechanization and operational experience with the backup control system, the problems involved in ...
Lock, W. P. +2 more
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Energies, 2018 Squeal noise often occurs in a two-stage electrohydraulic servo-valve, which is an unfavorable issue of modern hydraulic energy systems. The root causes of such noise from the servo-valve are still unclear.
Meng Chen +3 more
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Independent Orbiter Assessment (IOA): Analysis of the ascent thrust vector control actuator subsystem [PDF]
The results of the Independent Orbiter Assessment (IOA) of the Failure Modes and Effects Analysis (FMEA) and Critical Items List (CIL) are presented. The IOA approach features a top-down analysis of the hardware to determine failure modes, criticality ...
Riccio, J. R., Wilson, R. E.
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