Fluvial Geomorphology: Fluvial Channel Analysis and Design

1994 ◽  
pp. 391-421
Author(s):  
C.T. Haan ◽  
B.J. Barfield ◽  
J.C. Hayes
Keyword(s):  
Fluvial Geomorphology ◽  
Analysis And Design ◽  
Channel Analysis

scholarly journals Synchronous Generators Modeling and Control Using the Framework of Individual Channel Analysis and Design: Part 1

2007 ◽  
Vol 8 (5) ◽  
Author(s):  
Carlos Ernesto Ugalde Loo ◽  
Luigi Vanfretti ◽  
Eduardo Liceaga-Castro ◽  
Enrique Acha
Keyword(s):  
Control System ◽  
System Analysis ◽  
Block Diagram ◽  
Synchronous Generator ◽  
Careful Analysis ◽  
Operating Conditions ◽  
Synchronous Generators ◽  
Modeling And Control ◽  
Analysis And Design ◽  
Channel Analysis

In this paper a comprehensive dynamical assessment of a high order synchronous generator plant is carried out using the Individual Channel Analysis and Design (ICAD) framework –a multivariable control engineering tool that allows robustness and system performance evaluations. The great benefits of ICAD are elucidated and contrasted to those provided by the long-time honored block diagram representations. Several models used for the small signal stability analysis of synchronous generators are evaluated under the framework of ICAD. The study, which builds on pioneering work, reveals the great advantages of carrying out control system analysis and design with higher order generator models. Moreover, careful analysis of the ICAD's Multivariable Structure Function (MSF) helps to explain, formally, why some operating conditions of the control system are more critical than others. Furthermore, correct interpretations of MSFs are amenable to robust and stable control system designs. Two kinds of studies are considered in the paper; one assesses operation under various power factor conditions and the other under a varying tie-line reactance. The control system design and stability and structural robustness assessment of the system are presented in the second part of this paper. Moreover, results obtained under the ICAD framework are compared with those arising from conventional controllers.

Comparison of Measured Ship Squat with Numerical and Empirical Methods

2013 ◽  
Vol 57 (02) ◽  
pp. 73-85
Author(s):  
Michael J. Briggs ◽  
Paul J. Kopp ◽  
Vladimir K. Ankudinov ◽  
Andrew L. Silver
Keyword(s):  
International Association ◽  
Transport Infrastructure ◽  
Panama Canal ◽  
Ship Motions ◽  
Evaluation Tool ◽  
Analysis And Design ◽  
Numerical Predictions ◽  
World Association ◽  
Channel Analysis ◽  
Hydraulics Laboratory

The Beck, Newman and Tuck (BNT) numerical predictions are used in the Coastal and Hydraulics Laboratory (CHL) Channel Analysis and Design Evaluation Tool (CADET) model for predicting underkeel clearance (UKC) resulting from ship motions and squat. The Ankudinov empirical squat prediction formula has been used in the CHL ship simulator and was recently updated. The World Association for Waterborne Transport Infrastructure (formerly The Permanent International Association of Navigation Congresses, PIANC) has recommended several empirical and physics-based formulas for the prediction of ship squat. Some of the most widely used formulas include those of Barrass, Eryuzlu, Huuska, ICORELS, Romisch, Tuck, and Yoshimura. The purpose of this article is to compare BNT, Ankudinov, and PIANC predictions with measured DGPS squat data from the Panama Canal for four ships. These comparisons demonstrate that the BNT, Ankudinov, and PIANC predictions fall within the range of squat measurements and can be used with confidence in deep draft channel design.

Fundamental Analysis of the Static VAr Compensator Performance Using Individual Channel Analysis and Design

ENERGYO ◽  
2018 ◽  
Author(s):  
Carlos Ernesto Ugalde Loo ◽  
Enrique Acha ◽  
Eduardo Liceaga-Castro ◽  
Jesus U. Liceaga Castro
Keyword(s):  
Fundamental Analysis ◽  
Static Var Compensator ◽  
Analysis And Design ◽  
Channel Analysis

scholarly journals An Application of the Individual Channel Analysis and Design Approach to Control of a Two-input Two-output Coupled-tanks System

10.14311/1618 ◽  
2012 ◽  
Vol 52 (4) ◽  
Author(s):  
David J. Murray-Smith
Keyword(s):  
Feedback Control ◽  
Frequency Domain ◽  
Control Systems ◽  
Experimental Testing ◽  
Level Control ◽  
Nonlinear Dynamic Model ◽  
Analysis And Design ◽  
Frequency Domain Methods ◽  
Feedback Control Systems ◽  
Channel Analysis

Frequency-domain methods have provided an established approach to the analysis and design of single-loop feedback control systems in many application areas for many years. Individual Channel Analysis and Design (ICAD) is a more recent development that allows neo-classical frequency-domain analysis and design methods to be applied to multi-input multi-output control problems. This paper provides a case study illustrating the use of the ICAD methodology for an application involving liquid-level control for a system based on two coupled tanks. The complete nonlinear dynamic model of the plant is presented for a case involving two input flows of liquid and two output variables, which are the depths of liquid in the two tanks. Linear continuous proportional plus integral controllers are designed on the basis of linearised plant models to meet a given set of performance specifications for this two-input two-output multivariable control system and a computer simulation of the nonlinear model and the controllers is then used to demonstrate that the overall closed-loop performance meets the given requirements. The resulting system has been implemented in hardware and the paper includes experimental results which demonstrate good agreement with simulation predictions. The performance is satisfactory in terms of steady-state behaviour, transient responses, interaction between the controlled variables, disturbance rejection and robustness to changes within the plant. Further simulation results, some of which involve investigations that could not be carried out in a readily repeatable fashion by experimental testing, give support to the conclusion that this neo-classical ICAD framework can provide additional insight within the analysis and design processes for multi-input multi-output feedback control systems.

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