Rigorous Design and Efficient Optimizattion of Quarter-Wave Transformers in Metallic Circular Waveguides Using the Mode-Matching Method and the Genetic Algorithm

Riabi, Mohamed Lahdi; Thabet, Rawdha; Belmeguenai, M.

doi:10.2528/pier06072103

Cited by 28 publications

(11 citation statements)

References 19 publications

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“…The main performance of GA is based on composition, mutation, crossover and selection procedures [19][20][21][22][23][38][39][40][41][42][43]. The use of this search algorithm was applied to optimizing torque ripple, which has led to finding the interval of airgap in faulty and healthy conditions.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Method of Obtaining Degrees of Freedom for Radial Airgap Length in SRM Under Normal and Faulty Conditions Based on Magnetiostatic Model

Torkaman¹,

Afjei²

2010

PIER

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Abstract-In this paper, a new hybrid method of obtaining the degrees of freedom for redial airgap length in Switched Reluctance Motor operation under normal and faulty conditions based on magnetostatic analysis is presented. At the beginning, this method goes through the magnetic design of the motor utilizing three dimensional (3-D) Finite Element Method (FEM) in order to consider the end effects as well as axial fringing field effects. The motor parameters, such as torque, flux linkage, flux density versus rotor position are precisely obtained. Then, a Multi Layered Perception Neural Network is designed by considering the nonlinear behavior of the motor parameters obtained under different modes of operation. Using this network and the obtained parameters from FEM, an Objective Function (OF) for torque ripple with the aim of having a minimum mean square error is estimated. In addition, an improved Genetic Algorithm (GA) for the minimization the OF is also presented to determine the motor's operational regions. Finally, the legal intervals for different modes of motor operation are addressed.

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Section: Introductionmentioning

confidence: 99%

Hybrid Method of Obtaining Degrees of Freedom for Radial Airgap Length in SRM Under Normal and Faulty Conditions Based on Magnetiostatic Model

Torkaman¹,

Afjei²

2010

PIER

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“…Some of these methods are aiming at speeding up the matching process [2][3][4], while some others are aiming at improving the robustness [5,6]. Most existing drawbacks have been extensively solved subjected to given backgrounds, however, these methods have not reached a point that can be easily adopted into a practical system and expected to perform reliably well on various backgrounds.…”

Section: Introductionmentioning

confidence: 99%

A Fast and Robust Scene Matching Method for Navigation

Ren¹,

Chang²

2014

PIER M

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Abstract-The selection of matching method is critical to the scene matching navigation system, as it determines the accuracy of navigation. A coarse-to-fine matching method, which combines the area-based and feature-based matching method, is presented to meet the requirements of navigation, including the real-time performance, the sub-pixel accuracy and the robustness. In the coarse matching stage, the real-time performance is achieved by a pyramid multi-resolution technique, and the robustness is improved by multi-scale circular template fusion. In the precise matching stage, an improved SIFT method is introduced to calculate the matching position and the rotation angle. To validate the method, some experiments are completed. The results show that the proposed method can achieve the sub-pixel matching accuracy and improve the angle accuracy to 0.1 • .

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“…24 where the multipactor has been simulated numerically, although in very narrow waveguides compared to those used in practical applications. 25,26 Therefore a more detailed and general analysis is motivated for the important problem of multipactor discharges in circular waveguides. One step in this direction is presented in the present work where the multipactor discharge is simulated numerically in a waveguide having larger width than that studied in Ref.…”

Section: Introductionmentioning

confidence: 99%

Simulations of multipactor in circular waveguides

et al. 2010

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Detailed numerical simulations have been done to investigate the properties of multipactor breakdown in circular waveguides operating in the propagating fundamental TE11 mode. Main attention has been given to a comparison between the two fundamental cases corresponding to linear and circular polarizations, respectively, of the propagating electromagnetic wave. It is found that circular polarization is considerably more susceptible to multipactor than linear polarization. The reason for this difference is clarified by a comprehensive study of the electron motion in the waveguide.

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Rigorous Design and Efficient Optimizattion of Quarter-Wave Transformers in Metallic Circular Waveguides Using the Mode-Matching Method and the Genetic Algorithm

Cited by 28 publications

References 19 publications

Hybrid Method of Obtaining Degrees of Freedom for Radial Airgap Length in SRM Under Normal and Faulty Conditions Based on Magnetiostatic Model

Hybrid Method of Obtaining Degrees of Freedom for Radial Airgap Length in SRM Under Normal and Faulty Conditions Based on Magnetiostatic Model

A Fast and Robust Scene Matching Method for Navigation

Simulations of multipactor in circular waveguides

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