Results 221 to 230 of about 505,709 (247)

Active feedback lightwave receivers

Optical Fiber Communication, 1986
This paper describes new p-i-n-FET lightwave receivers that achieve high sensitivity without signal integration, and dynamic ranges large enough that they cannot be saturated by present lightwave transmitters. IC versions can be realized inexpensively in standard fine-line NMOS, CMOS, or GaAs IC technologies, and thus are suitable for loop-plant, local-
G. Williams, H. LeBlanc
openaire   +1 more source

ACTIVE SUSPENSIONS DECOUPLING BY ALGEBRAIC FEEDBACK

Theory and Practice of Control and Systems, 1999
Active suspensions of advanced vehicles allows the active rejection of external disturbances exerted directly on the sprung mass of the vehicle and due to the road surface irregularity. We focus on the road irregularity disturbances with the purpose of isolating the chassis from vibrations transmitted through suspensions.
PRATTICHIZZO, DOMENICO, P. MERCORELLI, A. BICCHI, VICINO, ANTONIO   +3 more
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Active Feedback Control Using Adaptive Filtering

Journal of Vibration and Control, 2004
In this paper we apply a filtered-X algorithm to an active feedback control structure and derive the transfer function of a closed-loop control system. Simulation studies are then carried out on the closed-loop property while varying the parameters (input frequency, delays in plant, amplitude and phase of modeling filter).
Wang, Fenglin, Mechefske, Chris K.
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FORCE FEEDBACK VERSUS ACCELERATION FEEDBACK IN ACTIVE VIBRATION ISOLATION

Journal of Sound and Vibration, 2002
This paper compares the force feedback and acceleration feedback implementation of the sky-hook damper when it is used to isolate a flexible structure from a disturbance source. It is shown that the use of a force sensor produces always alternating poles and zeros in the open-loop transfer function between the force actuator and the force sensor, which
Preumont, André, François, Arnaud, Bossens, Frédéric, Abu-Hanieh, AHMED MOHAMMED   +3 more
openaire   +1 more source

Low cost active–active oscillator utilizing loss feedback control

Applied Optics, 1990
We have constructed a low-cost, phosphate glass actively mode-locked, actively Q-switched oscillator that produces pulses from 150 to 1000 ps with high energy. This was accomplished by reducing the time required for relaxation oscillations to die out through the use of an acoustooptic feedback system.
D L, Smith, J H, Kelly, M J, Shoup Iii
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Internet Search by Active Feedback

2007 International Symposium on Communications and Information Technologies, 2007
Modern search engines with arrays of parallel servers can provide efficient Web information retrieval. However, as the returned results are usually enormous mass, finding target information is still time-consuming. To increase the correctness of returned results, different page ranking methods have been introduced.
Chang, Ray-I, Wu, Yu-Ying
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Method for active feedback suppression

The Journal of the Acoustical Society of America, 1993
A process to reduce the howl condition in a radiotelephone when the microphone picks up audio from the speaker. The condition is detected by first lowering the speaker volume (103) and measuring the microphone volume for a corresponding decrease (104).
Daniel E. Kobylarz, David K. Ford
openaire   +1 more source

Active co-constructive written feedback

Proceedings of the Seventh International Conference on Technological Ecosystems for Enhancing Multiculturality, 2019
This study explores innovative ways of promoting students' critical thinking through active co-constructive written feedback. Data were collected through naturalistic non-participant classroom observation and semi-structured interviews with the teacher and five students involved in an innovative academic practice in an undergraduate Biology course ...
Helena Pedrosa-de-Jesus, Cecília Guerra, Mike Watts   +2 more
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Feedback in Active Fault Detection

IFAC Proceedings Volumes, 2009
Abstract In recent years there has been increased interest in the use of active approaches toward fault detection. In one of these approaches a test signal is designed such that over a short period it will reveal a fault not otherwise detectable and do so with as little perturbation of system performance as possible.
Alireza Esna Ashari, Ramine Nikoukhah, Stephen L. Campbell   +2 more
openaire   +1 more source