Results 91 to 100 of about 4,207 (222)

Fault Detection in an Electro-Hydrostatic Actuator Using Polyscale Complexity Measures and Bayesian Classification

IEEE Open Journal of Instrumentation and Measurement
This article presents a novel approach for fault detection in a hydraulic actuation system. The fault of interest is the internal leakage of the actuator, which may often be caused by the wearing down of the piston seal.
Soleiman Hosseinpour, Witold Kinsner, Saman Muthukumarana, Nariman Sepehri   +3 more
doaj   +1 more source

A Qualitative and Quantitative Functional Modelling Method for PHM System Design

Chemical Engineering Transactions, 2013
In the early stage of PHM system design, it is very important to analyse the failure modes and their effects,i.e. FMEA. A great number of model-based methods have been proposed recently; however, the analysis process might concern only qualitative or ...
L. Song, Y. Liu, Z. Hu, D. Yang, S. Zhang   +4 more
doaj   +1 more source

Miniature photonic-crystal hydrophone optimized for ocean acoustics

, 2010
This work reports on an optical hydrophone that is insensitive to hydrostatic pressure, yet capable of measuring acoustic pressures as low as the background noise in the ocean in a frequency range of 1 Hz to 100 kHz.
Gordon S. Kino, Kim S., Knudsen V. O., Michel J. F. Digonnet, Olav Solgaard, Onur Kilic, Peng G. D., Škvor Z.   +7 more
core   +1 more source

Plasma sprayed titanium coatings with/without a shroud [PDF]

, 2020
: Titanium coatings were deposited by plasma spraying with and without a shroud. The titanium coatings were then assessed by scanning electron microscopy.
Zhou, Hong
core  

More Electricity in the Air: Toward Optimized Electrical Networks Embedded in More-Electrical Aircraft. [PDF]

, 2012
Along with the main trends and future challenges of electrical networks embedded in more-electrical aircraft, this article also focuses on optimization efforts in the field of industrial electronics and energy conversion.
Andrade, André de, Roboam, Xavier, Sareni, Bruno   +2 more
core   +3 more sources

Position tracking control of electro-hydrostatic actuators via adaptive finite-time backstepping and state observation

Scientific Reports
In this paper, the adaptive finite-time backstepping control approach is proposed for electro-hydrostatic actuator with symmetrical cylinder (EHSC) under the unmeasured states and disturbances.
Van Du Phan, Hung Le Nguyen, Van Chuong Le, Kyoung Kwan Ahn   +3 more
doaj   +1 more source

Advanced continuously variable transmissions for electric and hybrid vehicles [PDF]

A brief survey of past and present continuously variable transmissions (CVT) which are potentially suitable for application with electric and hybrid vehicles is presented. Discussion of general transmission requirements and benefits attainable with a CVT
Loewenthal, S. H.
core   +1 more source

Multi-axis transient vibration testing of space objects: Test philosophy, test facility, and control strategy [PDF]

IABG has been using various servohydraulic test facilities for many years for the reproduction of service loads and environmental loads on all kinds of test objects.
Lachenmayr, Georg
core   +1 more source

Stress Monitoring of Post-processed MEMS Silicon Microbridge Structures Using Raman Spectroscopy [PDF]

, 2012
Inherent residual stresses during material deposition can have profound effects on the functionality and reliability of fabricated Micro-Electro-Mechanical Systems (MEMS) devices.
Coutu, Ronald A., Jr., Starman, Lavern A.   +1 more
core   +1 more source

Non-linear modeling of active biohybrid materials [PDF]

, 2012
Recent advances in engineered muscle tissue attached to a synthetic substrate motivates the development of appropriate constitutive and numerical models.
Dorfmann, L., Paetsch, C.
core   +1 more source