滯后常數 的英文怎麼說
中文拼音 [zhìhòuchángshǔ]
滯后常數
英文
hysteresis constant-
2 mildly abnormal verbal communication. speech shows overall retardation. most speech is meaningful ; however, some echolalia orr pronoun reversal may occur. some peculiar words orr jargon may be used occasionally
輕度異常。語言發展表現出全面的滯后。大多數語言沒有意義，存在仿說或者代詞反用情況。偶爾出現怪異詞句或者沒有意義的話。And it is difficult to apply general pid control or fuzzy control to the equipment of crystal growth with nonlinear and great pure hysteresis characteristics
晶體生長爐具有參數時變、大慣性和大純滯后的特點，應用常規pid控制演算法，動態性能不理想；應用模糊控制演算法，穩態精度不能令人滿意，都難以實現有效的控制。The control of the ball mill pulverizing system in the 200mw unit in panxian power plant is researched in this paper. fuzzy control police most has application in the situation that it is difficult to establish object model. it has better stability and robustness
本文以盤縣發電廠200mw機組的球磨機制粉系統的控制為研究對象，針對球磨機具有的純滯后、大慣性和非線性、數學模型難以建立且隨時間緩慢變化等特點，常規控制方法難以取得良好的控制效果。Afterwards, in order to decrease the contradiction between the more complex and mass remote sensing image data and relatively slow speed of information extraction, an improved sfim image fusion method is proposed. this modified algorithm is on the base of sfim fusion technique, combines ihs method and sfim method and then replaces the former mean filter by an adaptive weighted mean filter. compared with the results of several common fusion techniques through a set of simulation tests between multispectral images and panchromatic images, it is proved that the new method can get an excellent result for the aim of improving spatial resolution while preserving the spectral information of multispectral images
論文的主要工作和成果包括：在像素層，論文研究了多傳感器數據融合理論及遙感圖像預處理的過程和步驟，歸納了多源遙感圖像像素層融合的常用演算法，並針對目前遙感數據呈海量化、復雜化這一發展趨勢同遙感信息提取的能力和效率滯后這一矛盾，在sfim演算法的基礎上，將ihs變換與sfim相結合，將原演算法中的均值濾波器改進為自適應加權均值濾波器，提出了一種改進的sfim演算法，通過對一組多光譜圖像和全色圖像的雙傳感器融合模擬對比試驗，證明了該演算法在保持原多光譜圖像光譜信息的同時，能夠有效提高融合圖像的空間分辨能力。There are many plants that have the character of time - varying, large delay, large inertia in the process of production of modern power station such as the superheated steam temperature, the reheated steam temperature, the water treatment of boiler and the load regulation. some of them have the strong character of nonlinear and some of them are multivariable coupling systems it is very difficult to obtain good effect of control by conventional pid control. it is necessary to set up the mathematics models of controlled plants if applying control means of modern control theory such as self - adaptive control, optimal control ， decoupling control and predictive control. and these control systems have large calculation and bad character of real time in general. these disadvantages make them be not able to meet the need of real production process and limit the application of them in modern power station. now the generator units are developing towards large capacity and high parameters. many new kinds of generating electricity means are coming into being. the characers of production units of power station become more and more complex but the demand to quality of control becomes more and more strict. the new control means are in bad need to control them effectively
現代電站的生產過程中存在過熱汽溫、再熱汽溫、鍋爐水處理、負荷調節等許多大遲延、大滯后、特性時變的對象，它們中有些還是具有強非線性特性的對象或多變量耦合系統，採用常規的pid控制手段很難取得良好的控制效果。若應用現代控制理論中的自適應控制、最優控制、解耦控制、預測控制等控制手段，則需要建立被控對象的數學模型，而且往往控制系統的計算量大、實時性差。這些缺點使其很難滿足實際生產過程的需要從而極大地限制了其在現代電站中的應用。Zong on indicate, contain hysteresis on industry, nonlinear and complex control object, usually melt with intelligence control method can get than the pid control of tradition better control effect, natural, for compare accurate mathematics somewhat object, control still with the method of tradition effect ripen more some, but for too complex unknown system, have state method can get the control result of ideal
綜上所述，對于工業上含有滯后，非線性和復雜的控制對象，通常採用智能化的控制方法能獲得比傳統的pid控制更好的控制效果，當然，對於一些比較精確的數學對象來說，還是用傳統的方法進行控制的效果更成熟一些，但對于過于復雜的未知的系統來說，用上述的方法會獲得理想的控制結果。According to the demand of the technology of gas nitriding, the author firstly put forward total demand analysis and systematic model - making for gas - nitriding furnace ' s temperature control system with uml in order to definite the temperature control system ' s functional requirement and the interaction of each object in this system on the basis of this idea. it ' s thought that the key step for realizing the temperature control system is the analysis and the design of the pid controller. considering that the gas - nitriding furnace has significant temperature lag, the author initially pointed out the opinion of realizing the system of temperature control by pid controller with pure lag compensation and then designed the parameter of pid controller with pure lag compensation and ordinary pid controller by matlab6. 5
這篇論文以作者本人在原工作單位的技術改造實踐中（即滲氮爐的技術改造）所遺留下來的技術問題為背景，根據氣體滲氮工藝的具體需要，首先提出了用uml對滲氮爐溫控系統進行總體的需求分析和系統實物建模以明確溫控系統的功能需求及各對象間的交互，在此基礎上分析得出溫控系統實現的關鍵所在即pid控制器的分析設計和實現，由氣體滲氮爐存在較大的溫度滯后這一特性，初步提出用帶純滯后補償的pid控制器來實現溫控系統的溫度控制，隨后藉助于matlab6 . 5平臺對帶純滯后補償的pid控制器和常規的pid控制器進行參數的設計與整定，進而在matlab6 . 5的simulink模擬環境中對基於兩種不同pid控制器的滲氮爐的兩種溫控系統的設計方案進行了模擬實現及模擬結果比較，結果表明，採用帶純滯后補償的pid控制系統的魯棒性較常規的pid控制系統好。分享友人