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Time-domain Dynamic-performanceimprovement Method for Pulse-width-modulated DC-DC Converters Based on eigenvalue and eigenvector sensitivity

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Chinese Journal of Electrical Engineering 2023年第1期9卷 104-119页

作者： Hong Li Zexi Zhou Jinchang Pan Qian Liu School of Electrical Engineering Beijing Jiaotong UniversityBeijing 100044China

For pulse-width modulated(PWM)DC-DC converters,the input voltage fluctuation and load variation in practical applications make it necessary for them to have better dynamic performance to meet the regulation requirements of the system.The dynamic-performance-improvement method for PWM DC-DC converters is mainly based on indirect dynamic performance indices,such as the gain margin and phase margin.However,both settling time and overshoot in the time domain are important in practical engineering.This makes it difficult for designers to obtain a clear understanding of the time-domain dynamic performance that can be achieved with improved control.In this study,a direct analysis of the time-domain dynamic characteristic of PWM DC-DC converters is performed.A dynamic-performance-improvement method based on eigenvalues and eigenvector sensitivity(E2S-based DPIM)is proposed to directly improve the time-domain dynamic performance index of PWM DC-DC converters.By considering a boost converter with proportional-integral control as an example,an additional virtual inductor current feedback control was designed using the proposed dynamic-performance-improvement method.Simulation and experimental results verify the validity and accuracy of the proposed dynamic-performance-improvement method.

关键词： PWM DC-DC converter time-domain dynamic-performance-improvement method eigenvalue and eigenvector sensitivity additional virtual inductor current feedback control

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A Novel Perturbative Iteration Algorithm for Effective and Efficient Solution of Frequency-Dependent eigenvalue Problems

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Advances in Applied Mathematics and Mechanics 2012年第3期4卷 325-339页

作者： Rongming Lin School of Mechanical and Aerospace Engineering Nanyang Technological UniversityNanyang AvenueSingapore 639798Singapore

Many engineering structures exhibit frequency dependent characteristics and analyses of these structures lead to frequency dependent eigenvalue problems.This paper presents a novel perturbative iteration(PI)algorithm which can be used to effectively and efficiently solve frequency dependent eigenvalue problems of general frequency dependent systems.Mathematical formulations of the proposed method are developed and based on these formulations,a computer algorithm is devised.Extensive numerical case examples are given to demonstrate the practicality of the proposed method.When all modes are included,the method is exact and when only a subset of modes are used,very accurate results are obtained.

关键词： Frequency dependent eigenvalue problem structural vibration computer algorithm damped structural vibration perturbative iteration eigenvalue and eigenvector sensitivity

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