外文翻譯--改善電磁閥和液力偶合器的控制-全文預(yù)覽
【正文】 sufficient to counteract the dynamic reaction of the conveyor and as a result, a certain degree of overspeed can be noted in the initial stages of the start up. Despite the mentioned problems, it may be stated that the results of the velocity ramp start up are significantly better than can be expected from a discrete type of control operation. Further tests, utilizing different velocity curves and/or refined tuning of the control constants may produce better results. The overall results are acceptable. However, it can be noted that the performance of tail end drive is somewhat better than that at the head end. For each drive it is possible to notice a period of increased oscillations of torque/tensions between the period of 12 and 22 seconds in the startup. Once again by adjusting settings and/or the length of the duty cycle, the results can improve. 3. Conclusions Based on the results of simulations the following conclusions can be made: — The objectives which were set for the control concept of the solenoid valve have been achieved to a large extent. It was possible to convert the discrete action of the valve into a precise, continuous output. — The new system allows the application of the solenoid valve for velocity based starting strategy. However, control may not be as precise as for a torque based strategy, specifically during initial stages of the startup. — Care must be taken in fine tuning of the control parameters. Simulation results have shown that badly selected control parameters may lead to poor performance results. — As was shown, the concept may be applied both to very long and medium length conveyors. Existence of the tail drive is not a restriction for the application. However, only torque based starting strategy has been tested in this case. — PIDcontrol is a classic control technique which is widely applied in the process industry and which has provided good solutions to diverse control problems, provided that it is welltuned References [1] CTREBSKI, M.: Torque control using drain fluid coupling。 2）新系統(tǒng)允許 電磁閥的應(yīng)用可根據(jù)原策略的速度，然而，對(duì)于扭矩來(lái)說(shuō)控制可能不精確，尤其在開(kāi)始啟動(dòng)階段。 進(jìn)一步測(cè)試 , 運(yùn)用不同的速度曲線或者控制常數(shù)能得到更好的結(jié)果。 輸送機(jī)動(dòng)態(tài)模型的結(jié)果 ，在開(kāi)始階段描繪的圖的坡度大，尤其在泵剛工作的前 6秒之間。這樣可以進(jìn)一步探索啟動(dòng)階段速度。有關(guān)系統(tǒng)和輸送機(jī)的詳細(xì)的信息可能都來(lái)自 [9]。最大工作循環(huán) (tmax)的最佳值要根據(jù)指定的標(biāo)準(zhǔn)或動(dòng)態(tài)模仿實(shí)驗(yàn)經(jīng)反復(fù)試驗(yàn)確定。 雖然閥門(mén)只能關(guān)起 , 但如果通過(guò)控制開(kāi)關(guān)開(kāi)啟、停滯時(shí)間的線性地變化的閥來(lái)控制開(kāi)關(guān)是可能的。在控制器的性能上這些常數(shù)的每個(gè)作用用史密斯描述了 [3], 被總結(jié)如下 [7]： Kc 值小產(chǎn)生超載現(xiàn)象但穩(wěn)定性好 , 但當(dāng) Kc 值大時(shí)減少超載現(xiàn)象但增加設(shè)備循環(huán)。 數(shù)字 n 是當(dāng)前的測(cè)量誤差 , n 1是早先測(cè)量， n 2是 n1的前一個(gè)。 電磁閥和液體偶合器組合應(yīng)用 PID控制技術(shù)。盡管所有成功例子 , 許多典型的技術(shù) , 譬如比例 積分 導(dǎo)數(shù) (PID)控制。 2 背景知識(shí) 經(jīng)過(guò)一段時(shí)間研究，我們采用控制參量調(diào)整分離開(kāi)關(guān)實(shí)現(xiàn)連續(xù)控制，在電子學(xué)和農(nóng)業(yè)領(lǐng)域執(zhí)行試驗(yàn)并且在區(qū)域內(nèi)通過(guò)遞 象開(kāi)關(guān)方式實(shí)施系統(tǒng)。上部和下部的扭矩極限依照具體要求確定。但是 , 最初的高期望未被履行 , 主要由于缺乏對(duì)控制系統(tǒng)聯(lián)結(jié)的限制的理解的一些應(yīng)用。中文 2467字 附錄 A 譯文 改善電磁閥和液力偶合器 的控制 摘要 本文針對(duì)一個(gè)電磁閥連接的液力偶合器的操作法，是一種新、改善的控制方法。液力偶合器能通過(guò)各種各樣的方式完成它的性能 [1]，并且對(duì)工程師來(lái)說(shuō)是扣人心弦工作，因?yàn)槲ㄒ坏南拗埔苍S是某人的假想。 在多數(shù)場(chǎng)合這個(gè)技術(shù)是滿足的 , 然而 , 有不希望的副作用的源頭譬如那些與所謂的“抨擊”控制技術(shù)相關(guān)的。 PUTTER 和 Gouws[2]方法，保持相互依賴的參量是可能的，譬如在溫室里使用通過(guò)風(fēng)扇、加熱器和噴水隆頭的分離行動(dòng)使溫度和濕氣保持平衡。 PID控制比智能控制技術(shù) 的優(yōu)勢(shì)是少處理器容量和所需時(shí)間。通過(guò)控制閥門(mén)的開(kāi)關(guān) , 電動(dòng)機(jī) /連軸器扭矩能保持不變。測(cè)量間 的時(shí)間是重要的。 Tj 值小消除恒定值誤差 , 但導(dǎo)致控制設(shè)備迅速循環(huán)。公式 12， △ T被轉(zhuǎn)換成使用率 , 被定義如下： 使用率： △ T = max 100[%]ontt ?
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