pid控制系統(tǒng)外文翻譯-wenkub.com
2024-10-29 14:31 本頁面
【正文】 注意：仿真系統(tǒng)所采用的 PID 調(diào)節(jié)器與傳統(tǒng)的工業(yè) PID 調(diào)節(jié)器有所不同，各個參數(shù)之間相互隔離，互不影響，因而用其觀察調(diào)節(jié)規(guī)律十分方便。否則，將原比例系數(shù) S1 增大一些，再調(diào)整積分系數(shù) S0，力求改善控制過程。 PID 控制器參數(shù)的工程整定 ,各種調(diào)節(jié)系統(tǒng)中 參數(shù)經(jīng)驗(yàn)數(shù)據(jù)以下可參照： 溫度 T: P=20~60%,T=180~600s,D=3180s 壓力 P: P=30~70%,T=24~180s, 液位 L: P=20~80%,T=60~300s, 流量 L: P=40~100%,T=6~60s。但無論采用哪一種方法所得到的控制器參數(shù)，都需 要在實(shí)際運(yùn)行中進(jìn)行最后調(diào)整與完善。這種方法所得到的計(jì)算數(shù)據(jù)未必可以直接用，還必須通過工程實(shí)際進(jìn)行調(diào)整和修改 。 PID 控制器的參數(shù)整定 PID 控制器的參數(shù)整定是控制系統(tǒng)設(shè)計(jì)的核心內(nèi)容。其原因是由于存在有較大慣性組件（環(huán)節(jié)）或有滯后 (delay)組件，具有抑制誤差的作用， 其變化總是落后于誤差的變化。這樣，即便誤差很小，積 分項(xiàng)也會隨著時間的增加而加大，它推動控制器的輸出增大使穩(wěn)態(tài)誤差進(jìn)一步減小，直到等于零。 積分（ I）控制 在積分控制中，控制器的輸出與輸入誤差信號的積分成正比關(guān)系。 PID 控制器就是根據(jù)系統(tǒng)的誤差，利用比例、 積分、微分計(jì)算出控制量進(jìn)行控制的。 PID 控制器問世至今已有近 70 年歷史，它 以其結(jié)構(gòu)簡單、穩(wěn)定性好、工作可靠、調(diào)整方便而成為工業(yè)控制的主要技術(shù)之一。穩(wěn)態(tài)誤差是無錫職業(yè)技術(shù)學(xué)院 畢業(yè)設(shè)計(jì)說明書 (外文翻譯 ) 8 指系統(tǒng)的響應(yīng)進(jìn)入穩(wěn)態(tài)后，系統(tǒng)的期望輸出與實(shí)際輸出之差。比如人就是一個具有負(fù)反饋 的閉環(huán)控制系統(tǒng)，眼睛便是傳感器，充當(dāng)反饋，人體系統(tǒng)能通過不斷的修正最后作出各種正確的動作。在這種控制系統(tǒng)中，不依賴將被控量反送回來以形成任何閉環(huán)回路。有利用 PID 控制實(shí)現(xiàn)的壓力、溫度、流量、液位控制 器，能實(shí)現(xiàn) PID 控制功能的可編程控制器 (PLC)，還有可實(shí)現(xiàn) PID 控制的 PC 系統(tǒng)等等。不同的控制系統(tǒng)，其傳感器、 變送器、執(zhí)行機(jī)構(gòu)是不一樣的。智能 控制的典型實(shí)例是模糊全自動洗衣機(jī)等。s Logix product lines. ControlNet it can be linked directly with the use of the work to achieve its remote control function. 1, The openloop control systems Openloop control system is the object of the output ( control volume) of the controller (controller), the output will not be affected. In this control system, not dependent on the volume will be charged and sent back to form against any closedloop. 無錫職業(yè)技術(shù)學(xué)院 畢業(yè)設(shè)計(jì)說明書 (外文翻譯 ) 3 2,The closedloop control system Closedloop control system (loop control system) features of the accused The output (volume control) and the output affected by anti sent back to form a loop or more. And the positive feedback loop feedback control system, if the feedback signal and the signal systems to setting the contrary, call negative feedback (Negative Feedback), and if the same polarity, as positive feedback, closedloop control system is used generally negative feedback, or negative feedback control system. Many examples of closedloop control system. For example, people in a negative feedback loop control systems, sensor is the eyes, as feedback keep the human system through various amendments to finally make the right moves. If there are no eyes, no feedback loop, it became an openloop control system. Another, when a real clothing consecutive automatic washing machine will have to wash it. Wash and can automatically after 7659, it is a closed loop control system. 3, step response Step response is a step input added to the system, the system output. Responded to enter the steadystate error is steady, the difference between the desired output and actual output. Can be used to control the performance of the system stability, prospective, quick word to describe. System stability is the stability, a system to work normally must first be stable, Step response is from the point of view of convergence。無錫職業(yè)技術(shù)學(xué)院 畢業(yè)設(shè)計(jì)說明書 (外文翻譯 ) 2 外文翻譯 PID CONTROL SYSTEM Industrial automation has bee an important indicator to measure the level
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