Relations Between Attenuation and Phase in Feedback Amplifier Design

Bode, H. W.

doi:10.1002/j.1538-7305.1940.tb00839.x

Cited by 233 publications

(84 citation statements)

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“…Maybe the first mention of the interest of considering a fractional integro-differential operator in a feedback loop, though without using the term ''fractional'', was made by Bode (1940), and next in a more comprehensive way in Bode (1945). A key problem in the design of a feedback amplifier was to come up with a feedback loop so that the performance of the closed loop was invariant to changes in the amplifier gain.…”

Section: A Reviewmentioning

confidence: 99%

Tuning and auto-tuning of fractional order controllers for industry applications

Monje

Vinagre

Feliú

et al. 2008

Control Engineering Practice

890

503

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This paper deals with the design of fractional order PI l D m controllers, in which the orders of the integral and derivative parts, l and m, respectively, are fractional. The purpose is to take advantage of the introduction of these two parameters and fulfill additional specifications of design, ensuring a robust performance of the controlled system with respect to gain variations and noise. A method for tuning the PI l D m controller is proposed in this paper to fulfill five different design specifications. Experimental results show that the requirements are totally met for the platform to be controlled. Besides, this paper proposes an auto-tuning method for this kind of controller. Specifications of gain crossover frequency and phase margin are fulfilled, together with the iso-damping property of the time response of the system. Experimental results are given to illustrate the effectiveness of this method. r

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Section: A Reviewmentioning

confidence: 99%

Tuning and auto-tuning of fractional order controllers for industry applications

Monje

Vinagre

Feliú

et al. 2008

Control Engineering Practice

890

503

View full text Add to dashboard Cite

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“…Os métodos de resposta em frequência foram desenvolvidos nos anos de 1930 e 1940 com H. Nyquist [Nyquist 1932] e H. W. Bode [Bode 1940]. A resposta em frequência produz um enfoque vantajoso a partir do qual pode-se tratar os sistemas de controle com realimentação.…”

Section: Resposta Em Frequênciaunclassified

Projeto de compensadores pelo método da resposta de frequência: Uma interface interativa

Meza¹

2014

Anais Do XXV Simpósio Brasileiro De Informática Na Educação (SBIE 2014)

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Abstract. In this work shows an user interface interactive for the design of different types of compensators (lead, lag and jag-lead phase) by the frequency response method. This method belongs to the program of study in different engineering courses. The interface was implemented in MATLAB/GUIDE. The purpose of this interface is to assist engineering students in the study, analysis and design of these compensators and develop their engineering abilities through lab works. The interface shows useful due to in each step of the procedure design the performance parameters of the system are shown, as well as the effort control amplitude.Resumo. Neste trabalho apresenta-se uma interface de usuário interativa para o projeto de diferentes tipos de compensadores (por avanço, por atraso e por atraso-avanço de fase) utilizando o método da resposta de frequên-cia. Esse método faz parte do programa de estudo nos diferentes cursos de engenharia. A interface foi implementada no MATLAB/GUIDE. O propó-sito dessa interfaceé auxiliar os alunos de engenharia no estudo, análise e projeto desses tipos de compensadores e desenvolver as suas habilidades através dos trabalhos laboratoriais. A interface mostra-seútil porque a cada passo dos projetos os parâmetros de desempenho do sistemas em estudo são mostrados, bem como a amplitude do esforço de controle.

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“…Para un concepto clásico como el de la realimentación, referencias también clásicas resulta una excelente fuente de información, por ende para presentar las ideas iniciales, se utilizará la notación clásica de los primeros trabajos realizados por los pioneros en este tema, tales como Black, Blackmann, Terman, Bode, entre otros [24][25][26][27] [28]. Conceptualmente, los amplificadores realimentados son muy simples.…”

Section: Realimentación Negativa Convencionalunclassified

Realimentación Negativa AS: Una Aproximación a la Realimentación Negativa sin Reducción de Ganancia

García

2013

prospect

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RESUMENEl presente artículo es una reflexión sobre la realimentación negativa. La realimentación negativa es un clásico e importante concepto de la ingeniería electrónica que tiene un significativo número de aplicaciones, siendo una de las principales su uso en el diseño de amplificadores. La realimentación negativa ofrece múltiples ventajas, tales como el incremento del ancho de banda, reducción de la distorsión armónica, insensibilización de la ganancia del amplificador de los parámetros de los componentes activos, entre otras. Todas estas mejoras en el desempeño de los amplificadores se alcanzan al costo de ver reducida la ganancia del mismo, situación que puede ser conveniente en algunos casos, pero no en otros. Por lo anterior, en este artículo se propone una nueva forma de realimentación negativa de lazo simple con la que se tiene todas las ventajas antes mencionadas, con la novedad de no penalizar la ganancia del amplificador. Por tanto, se llevan a cabo unos desarrollos teóricos que luego son verificados con simulaciones en el software de aplicación Multisim® de National Instruments con el objeto de mostrar el funcionamiento de la aproximación propuesta en esta investigación. ABSTRACTThis article is a reflexion about the negative feedback. The negative feedback is a classic and important concept for the electronic engineering and it has a significant number of applications, the main one is used in the amplifier design. Negative feedback offers many advantages, such as increasing bandwidth, reduction of the harmonic distortion, desensitization of the amplifier gain parameters of the active components, among others. The performance improvements are achieved once you can see a gain reduction, a situation that may be desirable in some cases but not in others. Therefore, in this paper it is proposed a new form of single loop negative feedback with which you have all the advantages mentioned above, with the novelty of not penalizing the gain of the amplifier. Therefore, theoretical developments were made with the purpose to verify the simulations on the Multisim™ Software of National Instruments Inc. the way it works, as you can see in this paper.

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Relations Between Attenuation and Phase in Feedback Amplifier Design

Cited by 233 publications

References 0 publications

Tuning and auto-tuning of fractional order controllers for industry applications

Tuning and auto-tuning of fractional order controllers for industry applications

Projeto de compensadores pelo método da resposta de frequência: Uma interface interativa

Realimentación Negativa AS: Una Aproximación a la Realimentación Negativa sin Reducción de Ganancia

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