本文關(guān)鍵詞： 預(yù)應(yīng)力 智能張拉機(jī) 模糊PID控制技術(shù) 邏輯控制器 變頻器　出處：《河北科技大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：本文主要針對基于模糊PID控制技術(shù)的預(yù)應(yīng)力智能張拉機(jī)進(jìn)行研究,在分析了市場上已有的各類手動(dòng)張拉機(jī)和公路用智能張拉機(jī)、鐵路用智能張拉機(jī)后發(fā)現(xiàn),由于在預(yù)應(yīng)力施工時(shí)遇到的橋梁的類型眾多、橋梁的結(jié)構(gòu)和長度不盡相同、現(xiàn)場的工況復(fù)雜、液壓系統(tǒng)在壓力穩(wěn)定性、千斤頂摩阻影響以及超高壓工作時(shí)千斤頂Qg泄增加、高壓不泵油等原因,測試結(jié)果存在較大的離散性,采用普通PID控制技術(shù)的張拉機(jī),很難完全適應(yīng)所有環(huán)境,不能保證每次施工都能完全符合規(guī)范的要求,成功率偏低,往往造成很大的資源浪費(fèi),甚至埋下了事故隱患。在本課題中綜合分析了當(dāng)前存在的問題,總結(jié)了可能遇到的問題和難點(diǎn),整合了最新的傳感器技術(shù),采用了模糊PID控制技術(shù)對控制過程進(jìn)行了優(yōu)化,通過建立模糊規(guī)則庫,根據(jù)實(shí)時(shí)監(jiān)測的張拉力值和伸長量的誤差、及誤差的變化率提前預(yù)判當(dāng)前應(yīng)該用到的控制模型,并根據(jù)模型實(shí)時(shí)調(diào)整PID參數(shù),通過變頻器精確調(diào)節(jié)油泵,實(shí)現(xiàn)了在各類工況下千斤頂?shù)耐綇埨�、可控加載速率、精確施加張拉力,使施工過程完全符合了《公路橋涵施工技術(shù)規(guī)范》(JTG/T F50-2011)規(guī)范的要求。通過在實(shí)驗(yàn)室進(jìn)行模擬驗(yàn)證和施工現(xiàn)場的實(shí)際驗(yàn)證,總結(jié)和完善了控制模型和控制過程,經(jīng)過對比,張拉力的控制精度比標(biāo)準(zhǔn)要求的1.5%提高到了1%,成功率也提高了20%以上,受到了用戶的好評。
[Abstract]:This paper mainly focuses on the research of prestressing intelligent tensioner based on fuzzy PID control technology. After analyzing all kinds of manual tensioner and highway intelligent tensioner in the market, the intelligent tensioning machine for railway is found. Because there are many types of bridges in prestressed construction, the structure and length of bridges are not the same, the working conditions of the site are complex, and the hydraulic system is under pressure stability. Because of the influence of friction resistance of Jack, the increase of QG discharge of Jack and the non-pump oil under high pressure, the test results are discrete, and the tensioner with ordinary PID control technology is adopted. It is very difficult to fully adapt to all the environment, can not guarantee that every construction can fully meet the requirements of the specifications, the success rate is low, often causing a great waste of resources. In this paper, the existing problems are comprehensively analyzed, the possible problems and difficulties are summarized, and the latest sensor technology is integrated. The fuzzy PID control technology is used to optimize the control process. The fuzzy rule base is established and the error of tension and elongation is measured according to the real time monitoring. And the change rate of error in advance to determine the control model that should be used in advance, and real-time adjustment of PID parameters according to the model, through the precise regulation of the oil pump by frequency converter, the Jack in all kinds of working conditions to achieve synchronous tension. Controllable loading rate, accurate application of tensile force. The construction process conforms to the requirements of JTG / T F50-2011.Through the simulation in the laboratory and the actual verification of the construction site, the construction process meets the requirements of the "Highway Bridge and culvert Construction Technical Code" (JTG / T F50-2011). The control model and control process are summarized and perfected. Through comparison, the control precision of tension force is improved to 1 than 1.5% required by the standard, and the success rate is increased by more than 20%, which is well received by users.
【學(xué)位授予單位】：河北科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U445.33;TP273.4

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本文編號(hào)：1456696