Efficient optimization-oriented design methodology of high-order 3-D filters using 2-D and 3-D electromagnetic simulators

2014 ◽  
Vol 43 (10) ◽  
pp. 1431-1445 ◽  
Author(s):  
J. Hinojosa ◽  
F. D. Quesada-Pereira ◽  
M. Bozzi ◽  
A. Alvarez-Melcon
Keyword(s):  
Design Methodology ◽  
High Order

A design methodology for high-order class-D audio amplifiers

2013 ◽  
Vol 78 (3) ◽  
pp. 785-798 ◽  
Author(s):  
Davide Cartasegna ◽  
Piero Malcovati ◽  
Lorenzo Crespi ◽  
Kyehyung Lee ◽  
Andrea Baschirotto
Keyword(s):  
Design Methodology ◽  
High Order ◽  
Audio Amplifiers ◽  
Class D

High-Order Compensator Augmentation of a Baseline Partial Authority Controller for Rotorcraft

2021 ◽  
Author(s):  
J. Michael Spires ◽  
Joseph F. Horn
Keyword(s):  
Test Data ◽  
Design Methodology ◽  
Flight Test ◽  
High Order ◽  
Plant Identification ◽  
Compensator Design ◽  
Architecture And Design

An architecture and design methodology for high-order compensator (HOC) augmentation of a baseline controller for rotorcraft is presented. With this architecture, the HOC compensator is selectable and can easily be authority limited, which might ease certification. Also, the plant for this augmentative multi-input multioutput compensator design is a stabilized helicopter system, so good flight-test data could be safely gathered for more accurate plant identification. The design methodology is carried out twice on an example helicopter model, once with turbulence rejection as the objective, and once with the additional objective of closely following pilot commands. The turbulence rejection HOC is feedback only (HOC_FB), while the combined objective HOC has both feedback and feedforward elements (HOC_FBFF). The HOC_FB was found to be better at improving turbulence rejection but generally degrades the following of pilot commands. The HOC_FBFF improves turbulence rejection relative to the baseline controller, but not by as much as HOC_FB. However, HOC_FBFF also generally improves the following of pilot commands.

A systematic design methodology for power-optimal design of high-order multi-bit continuous-time Delta-Sigma modulators

2008 ◽  
Vol 58 (3) ◽  
pp. 215-225 ◽  
Author(s):  
Yi Ke ◽  
Soheil Radiom ◽  
Jan Craninckx ◽  
Guy Vandenbosch ◽  
Georges G. E. Gielen
Keyword(s):  
Optimal Design ◽  
Continuous Time ◽  
Design Methodology ◽  
High Order ◽  
Systematic Design ◽  
Delta Sigma

Determination of the Burgers vector of a dislocation in a Fe-Mn alloy by weak-beam image in HVEM

1978 ◽  
Vol 36 (1) ◽  
pp. 330-331
Author(s):  
Y. Ishida ◽  
H. Ishida ◽  
K. Kohra ◽  
H. Ichinose
Keyword(s):  
High Order ◽  
Simulation Technique ◽  
The Other ◽  
Image Simulation ◽  
Diffraction Vector ◽  
Burgers Vector ◽  
Weak Beam ◽  
Beam Image ◽  
Edge Component

IntroductionA simple and accurate technique to determine the Burgers vector of a dislocation has become feasible with the advent of HVEM. The conventional image vanishing technique(1) using Bragg conditions with the diffraction vector perpendicular to the Burgers vector suffers from various drawbacks; The dislocation image appears even when the g.b = 0 criterion is satisfied, if the edge component of the dislocation is large. On the other hand, the image disappears for certain high order diffractions even when g.b ≠ 0. Furthermore, the determination of the magnitude of the Burgers vector is not easy with the criterion. Recent image simulation technique is free from the ambiguities but require too many parameters for the computation. The weak-beam “fringe counting” technique investigated in the present study is immune from the problems. Even the magnitude of the Burgers vector is determined from the number of the terminating thickness fringes at the exit of the dislocation in wedge shaped foil surfaces.

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