翻訳と辞書 Words near each other ・ Nichols Farms Historic District ・ Nichols Field (Colorado) ・ Nichols Field (Philippines) ・ Nichols Hall ・ Nichols High School ・ Nichols Hills, Oklahoma ・ Nichols House ・ Nichols House (Newton, Massachusetts) ・ Nichols House Museum ・ Nichols House, Eltham ・ Nichols Industries, Inc. ・ Nichols Islands ・ Nichols Medal ・ Nichols Memorial Library ・ Nichols plc ・ Nichols plot ・ Nichols Point, Victoria ・ Nichols radiometer ・ Nichols railway station ・ Nichols Ridge ・ Nichols Rock ・ Nichols Satinet Mill Site ・ Nichols School ・ Nichols Shore Acres, Wisconsin ・ Nichols Snowfield ・ Nichols v Jessup ・ Nichols v. Universal Pictures Corp. ・ Nichols' Regiment of Militia ・ Nichols' worm eel ・ Nichols, California Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Nichols plot ： ウィキペディア英語版 Nichols plot The Nichols plot is a plot used in signal processing and control design, named after American engineer Nathaniel B. Nichols.〔Isaac M. Howowitz, ''Synthesis of Feedback Systems'', Academic Press, 1963, Lib Congress 63-12033 p. 194-198〕〔Boris J. Lurie and Paul J. Enright, ''Classical Feedback Control'', Marcel Dekker, 2000, ISBN 0-8247-0370-7 p. 10〕〔Allen Stubberud, Ivan Williams, and Joseph DeStefano, ''Shaums Outline Feedback and Control Systems'', McGraw-Hill, 1995, ISBN 0-07-017052-5 ch. 17〕 ==Use in Control Design== Given a transfer function, $G(s)\; =\; \backslash frac$ with the closed-loop transfer function defined as, $M(s)\; =\; \backslash frac$ the Nichols plots displays $20\; \backslash log\_(|G(s)|)$ versus $\backslash arg(G(s))$. Loci of constant $20\; \backslash log\_(|M(s)|)$ and $\backslash arg(M(s))$ are overlaid to allow the designer to obtain the closed loop transfer function directly from the open loop transfer function. Thus, the frequency $\backslash omega$ is the parameter along the curve. This plot may be compared to the Bode plot in which the two inter-related graphs - $20\; \backslash log\_(|G(s)|)$ versus $\backslash log\_(\backslash omega)$ and $\backslash arg(G(s))$ versus $\backslash log\_(\backslash omega)$) - are plotted. In feedback control design, the plot is useful for assessing the stability and robustness of a linear system. This application of the Nichols plot is central to the Quantitative feedback theory (QFT) of Horowitz and Sidi, which is a well known method for robust control system design. In most cases, $\backslash arg(G(s))$ refers to the phase of the system's response. Although similar to a Nyquist plot, a Nichols plot is plotted in a Cartesian coordinate system while a Nyquist plot is plotted in a polar coordinate system. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Nichols plot」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.