本文選題：PID偏差耦合控制 + 同步控制�。� 參考：《北方工業(yè)大學(xué)》2017年碩士論文

【摘要】：冷彎成型產(chǎn)品因其表面質(zhì)量好、材料利用高等優(yōu)點(diǎn)被廣泛應(yīng)用于建筑、汽車、航天等領(lǐng)域。隨著工業(yè)技術(shù)不斷向高、精、尖的方向發(fā)展,對于板材的成型精度也有了更高的要求,而高精度的冷彎產(chǎn)品必然需要高精度的生產(chǎn)設(shè)備。本文主要致力于提高北方工業(yè)大學(xué)研制的單軸變截面冷彎成型機(jī)的成型精度。單軸變截面冷彎成型機(jī)是一種可實(shí)現(xiàn)單邊變截面板材的設(shè)備,具有成本低、易于控制等特點(diǎn)。在成型過程中,板材截面的變化是通過控制伺服電機(jī)帶動軋輥運(yùn)動來實(shí)現(xiàn)的,板材的成形精度與控制成型輥的伺服電機(jī)的控制精度密切相關(guān),因此提高單軸柔性冷彎機(jī)中單機(jī)組的伺服電機(jī)的同步性能是本文的重要工作之一。在PXI控制器、NI7350運(yùn)動控制卡構(gòu)建的雙電機(jī)伺服控制系統(tǒng)上,通過大量的實(shí)驗(yàn),分析比較了并行控制、主從控制等多種同步控制方案的同步精度與跟蹤誤差,提出了基于PID偏差耦合控制的提高雙電機(jī)系統(tǒng)同步精度的控制方案,電機(jī)空載實(shí)驗(yàn)及機(jī)組實(shí)驗(yàn)均驗(yàn)證了方法的有效性。考慮到板材成型過程中板速的不可控,采用AutoCAD圖形離散化方法獲得板型數(shù)據(jù),導(dǎo)入控制程序中,進(jìn)一步降低板速影響,從而提高設(shè)備成型精度。此外,作為影響控制精度的重要因素,板材速度在成型中會因受到各種因素干擾而產(chǎn)生波動。本文采用多傳感器組合監(jiān)測的方法,合理、準(zhǔn)確的估算板材實(shí)時(shí)速度,大大提高了多機(jī)組聯(lián)動精度,從而進(jìn)一步提高了板材的成型精度。
[Abstract]:Cold forming products are widely used in the fields of building, automobile and spaceflight because of their good surface quality and high utilization of materials. With the continuous development of industrial technology to the direction of high, fine and sharp, the forming accuracy of sheet metal has higher requirements, and high precision cold bending products must need high precision production equipment. This paper is mainly devoted to improving the forming accuracy of the uniaxial variable cross section cold forming machine developed by Northern University of Technology. Uniaxial cold forming machine with variable cross section is a kind of equipment which can realize single side variable section plate. It has the characteristics of low cost and easy control. In the forming process, the change of sheet section is realized by controlling the servo motor to drive the roll movement. The forming accuracy of sheet metal is closely related to the control precision of the servo motor controlling the forming roll. Therefore, it is one of the important work in this paper to improve the synchronous performance of single unit servo motor in single axis flexible cold bending machine. Based on the dual-motor servo control system constructed by PXI controller NI7350 motion control card, the synchronization accuracy and tracking error of parallel control, master-slave control and other synchronous control schemes are analyzed and compared through a large number of experiments. A control scheme based on pid deviation coupling control is proposed to improve the synchronization accuracy of double motor system. The validity of the method is verified by the no-load motor experiment and the unit experiment. Considering the uncontrollable speed of the plate during the forming process, the plate shape data are obtained by using AutoCAD graphic discretization method, which is introduced into the control program to further reduce the influence of the plate speed, thereby improving the forming accuracy of the equipment. In addition, as an important factor affecting the control accuracy, the velocity of sheet metal fluctuates during forming due to the interference of various factors. In this paper, the method of multi-sensor combined monitoring is used to estimate the real-time speed of plate reasonably and accurately, which greatly improves the precision of multi-unit linkage and further improves the forming accuracy of sheet metal.
【學(xué)位授予單位】：北方工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TG305;TP273

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本文編號：2069607