valve and loop 中文意思是什麼
valve and loop
解釋
閥件和定量管-
The company takes advantage of advanced dcs control system, high efficient float valve tray technology, high efficient energy - saving exchange techniques, fcc catalytic cracking double riser, two - generator regeneration process, polypropylene with loop reactor process and refining and blending process of high - number gasoline, etc. to ensure providing the users with high - tech qualified products
公司採用先進的dcs控制系統，高效的浮閥塔盤技術，高效節能交換技術， fcc催化裂化雙提升管、兩器再生工藝，環管聚丙烯工藝，高排號汽油精製調和工藝等，確保高科技合格產品送至用戶手中。 -
Comparing and analyzing the synchronous control strategy, which brings up the new method to control the double un - symmetry jars proceed synchronously with the combination of proportional valve and servo valve, which forms closed loop control ; basing on the above methods, models are made to get mathematics models of position control system and to analyze system model theoretically by using pid controller, we can realize regulating parameters, minimizing synchronous errors and enhancing the dynamic performances ; the simulink tool box in matlab software is used to imitate the system according to the model, which not only makes the result visual and easy to adjust the parameters in interactive way but also lets us understand the effects of different parameters and optimizes the dynamic properties. the theory of plc control in dshp is discussed after advanced understanding of the system movements. hardware design and general regulation are given on the base of siemens company products s7 - 200 plc
本文根據大量的國內外文獻，對研配液壓機的工作原理及設計結構進行了簡介；對位置同步的控制方法進行了比較分析，提出比例閥和伺服閥復合控制的閉環結構來對非對稱雙缸進行同步控制電液比例同步控制方案；在此基礎上著重對比例閥控非對稱缸建模，最後得到位置控制系統的總體數學模型，從理論上對同步系統動態特性進行了分析，並用pid控制器進行參數整定，減小雙缸同步誤差、提高系統的動態響應性能；其中控制性能的分析藉助于matlab軟體中的simulink工具箱，由已建立的數學模型形成模擬模型，得到可視化的模擬結果，從而利於交互方式下調整參數，了解不同的參數對系統的影響，優化同步系統的動態性能；在深入了解系統的動作特性后，對plc控制研配液壓機的原理進行了探討，針對siemens公司s7 ? 200型plc給出了硬體設計的總體規劃，編制出研配液壓機動作控製程序，在編程中著重研究位移傳感器與plc的通訊、雙缸同步運行的pid控制在plc上的實現及bcd碼撥盤輸入程序的植入問題。 -
The air - fuel ratio closed loop control adjusts the air - fuel ratio near the theoretical value by controlling the supplementary air of supplementary valve based on the signals of oxygen sensor, running speed and water temperature and which is necessary condition for three - way catalyst converter to work more efficiently
空燃比閉環控制是根據氧傳感器、轉速和水溫信號，控制化油器后補氣閥補氣將空燃比控制在理論值附近，為三元催化轉換器高效工作準備必要條件，使其最大限度降低尾氣排放。 -
The respect drive system design : the servo valve commonly used in the closed - loop control system is replaced with the proportion direction valve, and controlled it with the methods of electrohydraulic proportional control. the system adopts the hydraulic circuits that prevent the simulating table letting down because it own weight take place
驅動系統設計方面：用比例方向閥取代了液壓閉環控制系統中常用的伺服閥，採用電液比例技術對其進行控制，並在液壓油路中採用了防止因模擬轉臺自重而產生緩慢下滑的液壓迴路。 -
After completing the static and dynamic experiments on the5 electro - hydraulic component & system test unit, the author made further experiment research in the close loop system of hydraulic elevator, and get satisfying testing results. to sum up, the author build a set of theories and formulary for the design of integrated valve, change the traditional methods for the structure design of hydraulic elevator valves by the tools of pro / e, carry out a lot tests of the integrated valve on the special test platform
縱觀全文，作者對針對液壓電梯專用集成閥建立了一套比較完整的設計計算的理論依據；採用三維造型軟體對集成閥進行實體建模，改變了液壓電梯專用集成閥的傳統結構設計方法，使集成閥的結構設計達到了更好的效果；利用專門的電液元件測試平臺和液壓電梯臺架對集成閥進行了比較全面的實驗，拓展了新元件的實驗研究手段。 -
The actuators are nozzle vetor controller, rotational measuring valve controller and vane controller. the smart actuators are capable of data collection, self - calibration, power - on self - test and local close - loop control, etc. a simplified mathematical model for the vector nozzle is constructed, and the relationship between the state of vector nozzle and actuator cylinders ’ position is obtained. the effect of the position controller is tested
實現了智能執行機構的數據採集、自校準、上電自檢測和局部閉環控制等功能，建立了矢量噴口實驗件的簡化數學模型，推導了矢量噴口狀態和作動筒位置之間的關系，並在含實物平臺上對位置控制器的效果進行了實驗驗證。 -
After the introduction of the digital valve, the closed - loop model is simplified by means of linear theory and simulated through the algorithm of incremental pid control
第四章，對pid控制策略進行概述，得出試驗機應用數字閥閉環后的簡化模型，並利用增量式pid演算法進行模擬。 -
This paper analyses the type, function and characteristics of usual proportional control valves and raises a new modificative version in the light of their drawback. that is, basing on the principle of flow amplification and electrical feedback and throughout calculation and analysis on flow closed loop control and pressure flow combination., determination of the minimum controlled pressure difference as well as flow controlling range and structure of main valve and research of the dynamic and static characteristic, the paper puts forward control principle of " flow - load pressure change - displacement revision " and pressure / flow double closed loop, and further expounds that using a proportional controller and a electric mechanical transducer can separately serve the control function of pressure or flow as well as flow pressure combination
本論文分析了目前常用比例閥的類型、功能、特性，並針對其不足提出新的改進方案，即：以流量放大，電反饋兩個原理為基礎，通過對流量閉環控制及壓力流量復合的計算分析、確定上最小控制壓差及流量控制范圍，確定主閥結構、功能特性研究等，提出了「流量? ?負載壓力變化? ?位移修正」的控制原理和壓力流量雙閉環控制原理，並進一步論述了利用一個比例控制器和一個「電?機械轉換器」就可完成獨立的壓力或流量控制功能以及流量壓力復合控制功能。
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