comparing control change 中文意思是什麼
comparing control change
解釋
比較控制變更-
In the next place, by studying the change of the resonant frequency of the whole system, this paper designs the circuit to track the resonant frequency of the system by cd4046 mainly. at the same time, in order to improve the efficiency and get better dynamic capability of the converter, we choose pll and fuzzy control after comparing the pll circuit, fuzzy circuit and pll ? fuzzy control circuit. in the end, this paper brings forward the control blue print to realize the drive control circuit of the high frequency converter, using the dsp chip as the key part to realize four routes of pwm drive pulses with dead band of the control system
其次，通過對整個系統諧振頻率變化的分析和研究，設計了以鎖相環cd4046為核心的鎖相環控制電路，同時，在綜合比較鎖相環控制、模糊控制以及模糊控制和鎖相環復合控制三種控制演算法的基礎上，進行了系統模擬，得出採用復合控制可使跟蹤電路既具有鎖相環路較好的穩態性能，又擁有模糊控制較好的動態性能，系統魯棒性能好，同時也提高了逆變器的效率。 -
The paper analyzes the non - lineal relations of the quantity of heat exchange and water flux of coil exchanger in part - load operating condition, the shortage of deciding the water flux in bypass pipe, the disadvantage that the operating condition of pumps and chiller ca n ' t be met with the load change of the air conditioning system in different operating condition of using pressure - difference bypassing control in primary water pump system. using load control method in the change of the operating condition of primary water pump system can realize that the load change is small and reasonable in the on / off condition of pumps and m m chiller by comparing load control method in primary variable - flow water pump system with pressure - difference bypassing control method, back water temperature control method
本論文從目前空調工程中使用的變流量水系統入手，研究了盤管換熱器在部分負荷下水流量與換熱量的非線性關系，分析了文獻中介紹的旁通管通流能力選擇的不足之處和一次泵水系統採用壓差旁通控制時，工況轉換不能滿足系統控制要求的缺陷；比較了一次泵變流量水系統中壓差旁通控製法、回水溫度控製法、負荷控製法的精確性，並得出了在一次泵水系統的工況轉換時，採用負荷控製法能使冷水機組及其相應水泵在啟停時的負荷變化范圍較小，更符合建築物的冷量需求，節能效果較好的結論。 -
The dissertation focus on the main conflict of flow and sediment change, by analyzing the flow and sediment features, and change in rivercourse of typical period in histry, collecting the data of riverbed change. according to the flow and sediment change condition, combining the existed water works, and based on the results of former researches, the study are conducted on the law of flow state change by comparing rivercourse conditions before and after the completion of sanmenxia project, which may provide some idea for flow state change when xiaolangdi project completed and put into operation and some basic clue for the prediction of variation trend of river section from tiexie to shendi, from shendi to tieqiao near zhengzhou, from tieqiao near zhengzhou to dongbatou, from dongbatou to gaocun and so on in the year 2010 and the period 2010 to 2020. the result may provide some reference for flood control of these wangdering river sections, and some guidelines for planning of water projects and arrangement of project sequence
本課題緊緊抓住小浪底水庫運用后水沙變化這一主要矛盾，通過分析研究以往典型時期的水沙特點和河道演變特點，收集分析河床邊界條件變化資料，小浪底水庫運用后水沙資料變化，結合現有河道整治工程建設情況，總結前人的研究成果，重點研究三門峽水庫運用後下遊河道河勢變化的規律和特點，探索小浪底水庫運用後下遊河勢變化情況，分析預測游蕩性河道鐵謝至神堤、神堤至鄭州鐵橋、鄭州鐵橋至東壩頭、東壩頭至高村等各個河段在2010年， 2010年至2020年期間的河勢變化趨勢，為分析游蕩性河段的防洪形勢，指導河道整治工程建設的規劃和工程安排提供決策參考和依據。 -
Comparing with passive control, active control is more complicated and it need large amount of energy, although its performance is better than other control me thods in theory. semi - active control is a new control method that its control rely on the structural responses or external disturbances, and its control devices can change working status to adapt the vary loads comparing with passive control. and it does not need the large amount of external energy supply
與被動控制相比，半主動控制的特點是能隨結構動力反應或外界載荷的變化及時調整控制狀態，使控制裝置的減振作用更好地發揮出來，因而其控制效果更顯著；與主動控制相比，半主動控制不需要外部巨大能源的保證，也不存在控制失穩問題，因而半主動控制已成為結構振動控制新的研究方向。 -
Abstract : this paper proposes an self - adaptive speed - accommodating control circuit, which can get the speed - error, and can test the change of frequency of feedback signals of the single phase ac tacho generator through self comparing and automatically corrects the speed
文摘:文章介紹了通過自比較來檢測錄音機主導軸單相永磁交流測速發電機反饋信號的頻率變化，從而獲得速度誤差，並自動校正轉速的一種自適應速度調節控制電路。 -
Main content and major arguments of this thesis run as follows : ( 1 ) it puts forward four approaches on information cost studies based on the past researches on it, and then illustrates the concept on enterprise ' s information cost with more details ; ( 2 ) based on the four approaches on information cost studies, it forms the architecture on information costs by identifying them from enterprises ; ( 3 ) it analyzes the change of enterprise ' s information costs and some influence factors on them ; ( 4 ) it introduces basic four strategies on how to control and lower enterprise ' s information costs, including outsourcing, integration, supply chain management and construction on institution and culture. main methods on this study include : comparing, analyzing, synthetizing, interviewing and so on
本論文主要的研究內容包括：在已有研究研究成果基礎上，提出了信息成本研究的四種視角，分別是商品視角、技術視角、交易視角、管理視角，並在此基礎上，界定了企業信息成本的內涵和外延；以信息成本的四種視角為出發點，進一步識別企業的信息成本，建立企業信息成本的構成體系；分析企業信息成本的變化規律及影響因素；提出了控制企業信息成本的四大基本策略，包括外包策略、集成策略、供應鏈管理策略和制度、文化建設策略。 -
In this thesis, we achieve a test - bed of motion control based on dsp using tms320f240 evm, xds510 emulator, pc, ac servo driver, ac permanent magnet synchronic servo motor and two direction graph plotter etc. the thesis analyzes the influence that the dynamic characteristic and the change of parameter of the system cause contour error of the system, then adopts fuzzy adaptive pid control method, single neural cell pid control method and fuzzy - neural network control method, and introduces the influence that the control methods lead to dynamic characteristic and contour error of the system. finally some useful results are obtained by analyzing and comparing the control methods, and it is possible to make the combination of advanced control methods and high efficiency of dsp
在此基礎上，分析了系統的動態特性和參數變化對系統輪廓誤差的影響，先後採用了模糊自適應pid控制策略、單神經元pid控制策略以及模糊神經網路控制策略，並詳細分析和比較了這幾種控制策略對系統的動態特性和輪廓誤差的影響，得出了一些有用的結論，以使先進的控制策略和dsp的高效數據處理能力的結合成為可能。
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