本文關(guān)鍵詞： 負(fù)載敏感系統(tǒng) 叉車 AMESim 分流控制 仿真　出處：《燕山大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著工程機(jī)械行業(yè)中對節(jié)能的要求越來越高，負(fù)載敏感系統(tǒng)的應(yīng)用越來越廣，針對單執(zhí)行器系統(tǒng)而言，負(fù)載敏感系統(tǒng)能夠圓滿的滿足其工作要求。然而對于單泵驅(qū)動的多執(zhí)行器負(fù)載敏感系統(tǒng)，當(dāng)多執(zhí)行器要求同時(shí)動作且泵的最大流量不足以提供所有執(zhí)行器所需流量之和時(shí)，普通的負(fù)載敏感系統(tǒng)會出現(xiàn)高負(fù)載端壓力補(bǔ)償閥不起作用，從而出現(xiàn)高負(fù)載聯(lián)執(zhí)行器速度降低甚至停止的現(xiàn)象。本文針對這一現(xiàn)象對單泵驅(qū)動的多執(zhí)行器負(fù)載敏感系統(tǒng)的分流控制方法進(jìn)行研究。 本課題通過對單泵驅(qū)動的多執(zhí)行器負(fù)載敏感系統(tǒng)的不足之處的原因進(jìn)行分析，對其分流控制原理進(jìn)行深入研究，得到一種能解決流量不足的新的分流控制方法。并運(yùn)用于叉車系統(tǒng)中進(jìn)行驗(yàn)證。以CPCD160內(nèi)燃平衡叉車為研究對象，首先對該型號叉車工作部分中的各動作進(jìn)行簡單介紹，了解其動作需滿足的條件，并基于以上分析對各動作的負(fù)載敏感系統(tǒng)進(jìn)行了設(shè)計(jì)計(jì)算及基本元件的選型。 其次，利用AMESim軟件建立所設(shè)計(jì)的負(fù)載敏感系統(tǒng)中的各元件的仿真模型。搭建各工作部分液壓系統(tǒng)的仿真模型，結(jié)合實(shí)際工況進(jìn)行設(shè)計(jì)計(jì)算和仿真參數(shù)的設(shè)計(jì)，并進(jìn)行了仿真分析，分析仿真所得曲線。 再次，針對單泵驅(qū)動的多執(zhí)行器負(fù)載敏感系統(tǒng)提出了一種新的分流控制方法。以兩執(zhí)行器系統(tǒng)為例，進(jìn)行兩種情況的仿真分析，并進(jìn)行對比驗(yàn)證分流控制方法的正確性。把該分流控制方法應(yīng)用到叉車系統(tǒng)中，，對叉車的不同工況進(jìn)行仿真分析，驗(yàn)證加入分流控制方法能夠滿足復(fù)合動作的協(xié)調(diào)性。 最后，針對單支路控制系統(tǒng)中的控制器進(jìn)行了優(yōu)化。分別采用常規(guī)PID和二自由度PID控制對單支路控制系統(tǒng)進(jìn)行了數(shù)學(xué)模型的仿真，對仿真結(jié)果進(jìn)行了對比。并把二自由度PID加入帶分流控制的兩執(zhí)行器負(fù)載敏感系統(tǒng)進(jìn)行驗(yàn)證。
[Abstract]:With the increasing demand for energy saving in construction machinery industry, the application of load-sensitive system is becoming more and more extensive. The load-sensitive system can satisfy its working requirements satisfactorily. However, for the single-pump driven multi-actuator load-sensitive system, when the multi-actuator requires simultaneous operation and the maximum pump flow is not sufficient to provide the sum of all the actuators' required flow, Ordinary load-sensitive systems have high load end pressure compensation valves that do not work. In this paper, the shunt control method of multi-actuator load sensitive system driven by single pump is studied. Through the analysis of the reasons for the deficiency of the multi-actuator load sensitive system driven by single pump, the principle of shunt control is deeply studied in this paper. A new flow control method is obtained, which is used in forklift system. Taking CPCD160 internal combustion balance forklift as the research object, the operation of the working part of this type forklift is introduced briefly. Based on the above analysis, the load sensitive system of each action is designed and calculated and the basic components are selected. Secondly, the simulation model of the components in the load sensitive system is established by using AMESim software. The simulation model of the hydraulic system is built, and the design calculation and simulation parameters are carried out according to the actual working conditions. The simulation analysis is carried out, and the simulation curve is analyzed. Thirdly, a new shunt control method is proposed for multi-actuator load-sensitive system driven by single pump. Taking two actuators as an example, the simulation analysis of two cases is carried out. The method is applied to the forklift truck system, and the simulation analysis of the different working conditions of the forklift truck is carried out, and it is verified that adding the shunt control method can meet the coordination of the compound action. Finally, the controller of the single branch control system is optimized. The mathematical model of the single branch control system is simulated by conventional PID and two-degree-of-freedom PID control, respectively. The simulation results are compared and the two-degree-of-freedom PID is added to the two-actuator load sensitive system with shunt control for verification.
【學(xué)位授予單位】：燕山大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TH242;TP273

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