翻訳と辞書 Words near each other ・ Smith Park ・ Smith Park Architectural District ・ Smith Peak ・ Smith Peak (Tuolumne County, California) ・ Smith Peaks ・ Smith Peninsula ・ Smith Point ・ Smith Point (Antarctica) ・ Smith Point (band) ・ Smith Point Airport ・ Smith Point Bridge ・ Smith Point County Park ・ Smith Point Light ・ Smith Point, Texas ・ Smith Pool ・ Smith predictor ・ Smith Private Airport ・ Smith Quartet ・ Smith Ranch-Highland ・ Smith Red Valencia ・ Smith Report ・ Smith Reynolds Airport ・ Smith Richardson Foundation ・ Smith Ridge ・ Smith River ・ Smith River (California) ・ Smith River (Jamaica) ・ Smith River (Liard River) ・ Smith River (McKenzie River) ・ Smith River (Montana) 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 Smith predictor ： ウィキペディア英語版 Smith predictor The Smith predictor (invented by O. J. M. Smith in 1957) is a type of predictive controller for systems with pure time delay. The idea can be illustrated as follows. Suppose the plant consists of $G(z)$ followed by a pure time delay $z^$. As a first step, suppose we only consider $G(z)$ (the plant without a delay) and design a controller $C(z)$ with a closed-loop transfer function $H(z)=\backslash frac$ that we consider satisfactory. Next, our objective is to design a controller $\backslash bar(z)$ for the plant $G(z)\; z^$ so that the closed loop transfer function $\backslash bar(z)$ equals $H(z)\; z^$. Solving $\backslash frac\}\}\; =\; z^\; \backslash frac$, we obtain $\backslash bar\; =\; \backslash frac$. The controller is implemented as shown in the following figure, where $G(z)$ has been changed to $\backslash hat(z)$ to indicate that it is a model used by the controller. Note that there are two feedback loops. The outer control loop feeds the output back to the input, as usual. However, this loop alone would not provide satisfactory control, because of the delay; this loop is feeding back outdated information. Intuitively, for the k seconds during which no fresh information is available, the system is controlled by the inner loop which contains a predictor of what the (unobservable) output of the plant G currently is. To check that this works, a re-arrangement can be made as follows: Here we can see that if the model used in the controller, $\backslash hat(z)z^$, matches the plant $G(z)\; z^$ perfectly, then the outer and middle feedback loops cancel each other, and the controller generates the "correct" control action. ==References== * K. Warwick and D. Rees, ''Industrial Digital Control Systems'', IET, 1988. () 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「Smith predictor」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.