本文選題：直驅(qū)泵控液壓系統(tǒng) + 交流伺服電動機��； 參考：《廣東工業(yè)大學(xué)》2012年碩士論文

【摘要】：直驅(qū)泵控伺服液壓機采用定量泵和交流永磁同步電機作為動力單元,該伺服液壓系統(tǒng),依靠改變電機轉(zhuǎn)速實現(xiàn)系統(tǒng)流量調(diào)節(jié),從而實現(xiàn)對液壓系統(tǒng)的控制。與傳統(tǒng)的閥控系統(tǒng)不同的是,采用伺服電機和定量泵取代異步電機和變量泵的組合,具有體積小、高效節(jié)能、可靠性高等特點,被公認為液壓控制系統(tǒng)中最重要的發(fā)展方向之一,但直驅(qū)泵控系統(tǒng)動態(tài)特性不高等問題限制了其更廣泛的應(yīng)用。 本文的主要任務(wù)是針對伺服液壓機的要求進行直驅(qū)泵控電液伺服系統(tǒng)的研究,闡述了系統(tǒng)的原理、組成和特點。為了進一步拓寬系統(tǒng)的應(yīng)用前景,研究系統(tǒng)動態(tài)特性與節(jié)能機理,具體研究內(nèi)容如下： (1)在查閱大量國內(nèi)外相關(guān)文獻的基礎(chǔ)上,綜述了國內(nèi)外對直驅(qū)泵控伺服液壓系統(tǒng)的研究概況,通過闡述矢量控制的基本原理,并基于這一原理分別建立了交流異步電動機和交流永磁同步伺服電動機的數(shù)學(xué)模型。闡述了Matlab/Simulink建模與仿真的基本原理和方法,以交流永磁同步伺服電動機為執(zhí)行電機,運用Simulink和傳遞函數(shù)法分別建立交流調(diào)速模塊和泵控缸模塊的仿真模型,并在此基礎(chǔ)上進行了大量計算機仿真測試與分析。 (2)通過改變系統(tǒng)結(jié)構(gòu)參數(shù),分析各參數(shù)對系統(tǒng)動態(tài)特性的影響,提出了改善系統(tǒng)動態(tài)特性的可行措施。 (3)以盒形件拉深加工為實例,建立了其各個工序動作過程液壓系統(tǒng)的數(shù)學(xué)模型和仿真模型,針對一個工作循環(huán)周期內(nèi)能耗進行了分析與計算機仿真,并將其與普通多功能拉深液壓機進行了比較分析。 (4)搭建直驅(qū)泵控伺服液壓試驗臺,進行了試驗研究,比較實際系統(tǒng)在不同結(jié)構(gòu)參數(shù)時的動態(tài)特性,將試驗研究與理論分析結(jié)合,全面、系統(tǒng)地分析系統(tǒng)動態(tài)特性；在直驅(qū)泵控伺服液壓機樣機上進行拉深工藝能耗對比試驗,檢驗其節(jié)能效果。 研究表明,容積調(diào)速的特點制約著直驅(qū)泵控電液伺服系統(tǒng)的動態(tài)特性,但通過采取一些措施還是可以使系統(tǒng)動態(tài)特性得到一定提高。主要措施有：合理設(shè)計系統(tǒng)結(jié)構(gòu)和選用合適構(gòu)件,盡量使泵控動力機構(gòu)具有較高的動態(tài)特性。此外,實際應(yīng)用中還須采取措施減少或避免外界因素對系統(tǒng)性能造成的不利影響。 通過仿真與樣機試驗可得,直驅(qū)泵控伺服液壓機比普通多功能拉深液壓機節(jié)約了20%以上的能量。研究結(jié)果表明,數(shù)值仿真和實驗研究二者結(jié)果十分吻合,證實了數(shù)學(xué)仿真模型的正確性。
[Abstract]:The servo hydraulic press controlled by direct drive pump adopts quantitative pump and AC permanent magnet synchronous motor as power unit. The servo hydraulic system realizes the control of hydraulic system by changing the speed of motor to realize the system flow regulation. Different from the traditional valve control system, servo motor and quantitative pump are used to replace the combination of asynchronous motor and variable pump, which have the characteristics of small volume, high efficiency and energy saving, high reliability and so on. It is recognized as one of the most important development directions in hydraulic control system, but the dynamic characteristics of direct drive pump control system are not high, which limits its wider application. The main task of this paper is to study the direct-drive pump controlled electro-hydraulic servo system according to the requirements of servo hydraulic press. The principle, composition and characteristics of the system are expounded. In order to further broaden the application prospect of the system and study the dynamic characteristics and energy-saving mechanism of the system, the specific research contents are as follows: (1) on the basis of consulting a large number of related literature at home and abroad, This paper summarizes the research situation of direct drive pump control servo hydraulic system at home and abroad, and sets up the mathematical models of AC asynchronous motor and AC permanent magnet synchronous servo motor based on the basic principle of vector control. The basic principles and methods of modeling and simulation of Matlab / Simulink are described. The simulation models of AC speed regulating module and pump control cylinder module are established by using Simulink and transfer function method, respectively, using AC permanent magnet synchronous servo motor as executive motor. On this basis, a large number of computer simulation tests and analysis are carried out. (2) by changing the structure parameters of the system, the influence of each parameter on the dynamic characteristics of the system is analyzed. The feasible measures to improve the dynamic characteristics of the system are put forward. (3) taking the box drawing as an example, the mathematical model and the simulation model of the hydraulic system in each working procedure are established. The energy consumption in a working cycle is analyzed and simulated, and compared with the common multifunction drawing hydraulic press. (4) the direct drive pump controlled servo hydraulic test rig is built and the experimental research is carried out. Comparing the dynamic characteristics of the actual system with different structural parameters, combining the experimental research with the theoretical analysis, the dynamic characteristics of the system are analyzed comprehensively and systematically, and the energy consumption comparison tests of the drawing process are carried out on the prototype of the servo hydraulic press controlled by the direct drive pump. Test its energy saving effect. The study shows that the characteristics of volume speed regulation restrict the dynamic characteristics of the direct-drive pump controlled electro-hydraulic servo system, but some measures can be taken to improve the dynamic characteristics of the system. The main measures are as follows: reasonable design of the system structure and selection of suitable components to make the pump control power mechanism have higher dynamic characteristics as far as possible. In addition, measures should be taken to reduce or avoid the adverse effects of external factors on system performance. Through simulation and prototype test, the direct drive pump controlled servo hydraulic press can save more than 20% energy compared with the common multi-function drawing hydraulic press. The results show that the results of numerical simulation and experimental research are in good agreement with each other, and the correctness of the mathematical simulation model is verified.
【學(xué)位授予單位】：廣東工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH137.51

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