Results 81 to 90 of about 26,094 (339)
Spacecraft attitude sensor [PDF]
, 1973 A system for sensing the attitude of a spacecraft includes a pair of optical scanners having a relatively narrow field of view rotating about the spacecraft x-y plane.
Davidson, A. C., Grant, M. M.
core +1 more source
Advanced Materials, EarlyView.This work report a n electrolyte‑induced interfacial/bulk dual regulation strategy that enables negligible capacity decay in li‑rich cathodes. ABSTRACT Lithium‐rich manganese‐based oxides (LRMO) suffer from rapid capacity decay, mainly driven by interfacial instability and bulk structural degradation associated with Jahn‐Teller (J‐T) distortion in Mn3+‐
Tianqi Yang +17 more
wiley +1 more source
Applied SciencesThis article presents a suboptimal nonlinear control strategy to improve the dynamics of a three-phase alternating current (AC) motor. Using dynamic programming, the calculation of the Bellman function is avoided by determining a suboptimal control ...
Nicolás Cervantes-Escorcia +4 more
doaj +1 more source
Electronic measurement of variable torques in precision work technology [PDF]
Approaches for the determination of torques on the basis of length measurements are discussed. Attention is given to torque determinations in which the deformation of a shaft is measured, an electric measurement of the torsion angle, and an approach ...
Maehr, M.
core +1 more source
New motor shaft angular accelerometer concept [PDF]
, 1973 Concept permits measurement of the acceleration of continuously rotating shafts without use of slip rings or telemetry and with little additional inertial load.
Smetana, F. O.
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Pattern Formation in Non‐Equilibrium Architected Materials
Advanced Materials Technologies, EarlyView.This article demonstrates an artificial mechanical system ‐ a robotic metamaterial ‐ as an accessible and versatile platform within which to explore and prescribe the reaction‐diffusion driven pattern formation hitherto associated with comparatively less accessible and versatile non‐equilibrium biological and chemical systems.
Vinod Ramakrishnan, Michael J. Frazier
wiley +1 more source
Shaft Signals Corresponding to Cracked Rotor Bars of Induction Machines [PDF]
Ratings of induction machines range from tens of thousands horsepowers to fractional horsepowers. Unexpected downtime of large Induction motors, such as those used in power plants, can be very costly. Cracked rotor bars of induction machines may overheat
Gully, J.H., Hsu, J.S.
core
A prior selection of measurement modality for eccentricity detection in synchronous machines using a Cramér-Rao lower bound technique [PDF]
, 2014 C
Cronje, Willem +3 more
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Shaft Voltage Elimination Method to Reduce Bearing Faults in Dual Three-Phase Motor [PDF]
, 2022 Jun‐Hyuk Im +3 more
openalex +1 more source
3D Printed Multimaterial Microfluidic Transistors
Advanced Materials Technologies, EarlyView.We introduce a biocompatible, high resolution photopolymer resin that closely mimics the Young's Modulus (elasticity) and reversible stretchability (no hysteresis) of poly(dimethylsiloxane) (PDMS), enabling the fabrication of microfluidic transistors (i.e., microvalves capable of proportional amplification) by multimaterial stereolithography (mSLA ...
Alireza Ahmadianyazdi +7 more
wiley +1 more source