Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 3

DQ method Related Publications

3 The Optimized Cascade PI Controllers of the Generator Control Unit in the Aircraft Power System

Authors: A. Srikaew, W. Chayinthu, K-N. Areerak, K-L. Areerak

Abstract:

This paper presents the optimal controller design of the generator control unit in the aircraft power system. The adaptive tabu search technique is applied to tune the controller parameters until the best terminal output voltage of generator is achieved. The output response from the system with the controllers designed by the proposed technique is compared with those from the conventional method. The transient simulations using the commercial software package show that the controllers designed from the adaptive tabu search algorithm can provide the better output performance compared with the result from the classical method. The proposed design technique is very flexible and useful for electrical aircraft engineers.

Keywords: Artificial Intelligence, Modeling, Simulation, Cascade PI controllers, DQ method, Adaptive tabusearch, Generator control unit, Aircraft power system

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2 Averaging Model of a Three-Phase Controlled Rectifier Feeding an Uncontrolled Buck Converter

Authors: K-N. Areerak, K-L. Areerak, P. Ruttanee

Abstract:

Dynamic models of power converters are normally time-varying because of their switching actions. Several approaches are applied to analyze the power converters to achieve the timeinvariant models suitable for system analysis and design via the classical control theory. The paper presents how to derive dynamic models of the power system consisting of a three-phase controlled rectifier feeding an uncontrolled buck converter by using the combination between the well known techniques called the DQ and the generalized state-space averaging methods. The intensive timedomain simulations of the exact topology model are used to support the accuracies of the reported model. The results show that the proposed model can provide good accuracies in both transient and steady-state responses.

Keywords: Modeling, Simulation, DQ method, Generalized state-space averaging method, Three-phase controlled rectifier, Uncontrolled buck converter, Averaging model

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1 The Application of Adaptive Tabu Search Algorithm and Averaging Model to the Optimal Controller Design of Buck Converters

Authors: A. Srikaew, K-N. Areerak, K-L. Areerak, T. Sopapirm

Abstract:

The paper presents the applications of artificial intelligence technique called adaptive tabu search to design the controller of a buck converter. The averaging model derived from the DQ and generalized state-space averaging methods is applied to simulate the system during a searching process. The simulations using such averaging model require the faster computational time compared with that of the full topology model from the software packages. The reported model is suitable for the work in the paper in which the repeating calculation is needed for searching the best solution. The results will show that the proposed design technique can provide the better output waveforms compared with those designed from the classical method.

Keywords: Modeling and simulation, adaptive tabu search, DQ method, Buck converter, generalized state-space averaging method

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