Results 81 to 90 of about 34,061 (206)
Unbalanced Current Sharing Control in Islanded Low Voltage Microgrids
Energies, 2018 This paper reports a new control strategy to improve sharing of unbalanced currents in islanded LV microgrids. This technique provides fast and effective sharing of positive-, negative- and zero-sequence currents, and is the first example of zero ...
Foad Najafi +2 more
doaj +1 more source
Wind tunnel evaluation of YF-12 inlet response to internal airflow disturbances with and without control [PDF]
, 1978 The response of terminal-shock position and static pressures in the subsonic duct of a YF-12 aircraft flight-hardware inlet to perturbations in simulated engine corrected airflow were obtained with and without inlet control.
Cole, G. L. +2 more
core +1 more source
A new unified control strategy for inverter-based micro-grid using hybrid droop scheme
Alexandria Engineering Journal, 2019 Micro-grid (MG) operation using voltage control methods (VCMs) has been widely recommended for parallel operation of three phase voltage source inverters, especially during islanded mode to maintain the voltage level in the MG.
M.A. Aboushal +1 more
doaj +1 more source
Automatic tuning of hydrogen masers [PDF]
, 1969 Varying the density of the atoms in the cavity changes the Q of the atoms. When the cavity is mistuned, the density variation causes a frequency variation proportional to the degree of cavity ...
Levine, M., Vessot, R.
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ActuatorsSpeed control accuracy of gimbal servo systems for control moment gyroscopes (CMGs) is crucial for spacecraft attitude control. However, multiple disturbances from internal and external factors severely degrade the speed control accuracy of gimbal servo ...
Zhihao Lu, Zhong Wu
doaj +1 more source
International Journal of Electrical Power & Energy SystemsDelta-configured Cascaded H-Bridge (DCHB) topology is a suitable alternative for Static Synchronous Compensator (STATCOM) applications. However, under unbalanced voltage and/or current conditions, zero-sequence current needs to be injected to guarantee ...
Iosu Marzo +6 more
doaj +1 more source
Homodyne locking of a squeezer
, 2009 We report on the successful implementation of a new approach to locking the frequencies of an OPO-based squeezed-vacuum source and its driving laser. The technique allows the simultaneous measurement of the phase-shifts induced by a cavity, which may be ...
Cerf +10 more
core +1 more source
EnergiesThis article introduces a frequency-adaptive control strategy for a three-phase shunt active power filter, aimed at improving energy efficiency and ensuring high power quality in consumer-oriented power systems.
Haneen Ghanayem +4 more
doaj +1 more source
Development Of A Semi-Swath Craft For Malaysian Waters [PDF]
, 2006 Small Waterplane Area Twin Hull (SWATH) and Catamaran vessels are known to have more stable platform as compared to mono-hulls. A further advantage of SWATH as compared to Catamaran is its smaller waterplane area that provides better seakeeping ...
Abdul Malik, Adi Maimun +3 more
core
Terminal-shock and restart control of a Mach 2.5, axisymmetric, mixed compression inlet with 40 percent internal contraction [PDF]
Results of experimental tests conducted on a supersonic, mixed-compression, axisymmetric inlet are presented. The inlet is designed for operation at Mach 2.5 with a turbofan engine (TF-30). The inlet was coupled to either a choked orifice plate or a long
Baumbick, R. J.
core +1 more source