本文關(guān)鍵詞： 閉式液壓系統(tǒng) 起重機(jī) 二次起升 動(dòng)態(tài)特性 模糊控制　出處：《大連理工大學(xué)》2011年碩士論文　論文類型：學(xué)位論文

【摘要】：履帶起重機(jī)起升機(jī)構(gòu)作為履帶起重機(jī)的重要機(jī)構(gòu)之一,其動(dòng)態(tài)特性會(huì)直接影響整機(jī)的起重性能。而目前,國(guó)內(nèi)起重機(jī)起升機(jī)構(gòu)多采用開(kāi)式液壓系統(tǒng),國(guó)外已實(shí)現(xiàn)了全閉式液壓系統(tǒng)。 與開(kāi)式液壓系統(tǒng)相比,閉式液壓系統(tǒng)的特點(diǎn)是：大多是單泵單馬達(dá)系統(tǒng),且機(jī)構(gòu)動(dòng)作不相互影響；傳動(dòng)平穩(wěn),液壓沖擊和能量損失��；全電控可實(shí)現(xiàn)二次起升防回跌功能；管路連接少,且布置方便；油路簡(jiǎn)單,閥塊少,出現(xiàn)故障的幾率低；電控系統(tǒng)設(shè)計(jì)的可靠性對(duì)于安全至關(guān)重要。因此,通過(guò)建立閉式系統(tǒng)電液控制平臺(tái)對(duì)其進(jìn)行仿真研究,解決電控系統(tǒng)設(shè)計(jì)技術(shù)難點(diǎn),對(duì)閉式液壓系統(tǒng)在履帶起重機(jī)起升機(jī)構(gòu)上的廣泛應(yīng)用具有較大的工程實(shí)用意義。 本文以本課題組的預(yù)研項(xiàng)目閉式系統(tǒng)電液控制平臺(tái)為背景,對(duì)閉式液壓系統(tǒng)起升機(jī)構(gòu)的防二次回跌現(xiàn)象的電控技術(shù)進(jìn)行研究。 (1)在研究了閉式液壓系統(tǒng)原理及其特點(diǎn)的基礎(chǔ)上,提出了綜合考慮控制手柄、壓力記憶和制動(dòng)器開(kāi)啟時(shí)間等因素的二次起升控制原理。 (2)完成了閉式系統(tǒng)電液控制平臺(tái)的液壓和電氣原理設(shè)計(jì),并依據(jù)計(jì)算結(jié)果對(duì)閉式系統(tǒng)電液控制平臺(tái)進(jìn)行了元件選型和三維建模。 (3)推導(dǎo)了閉式液壓系統(tǒng)高壓腔的壓力隨時(shí)間的變化方程,輸出了負(fù)載與推手柄時(shí)間關(guān)系曲線及負(fù)載與制動(dòng)器開(kāi)啟時(shí)刻變化曲線。 (4)建立了控制手柄到馬達(dá)轉(zhuǎn)速的仿真系統(tǒng)模型,通過(guò)MATLAB仿真結(jié)果驗(yàn)證了該控制方法的有效性。 (5)基于閉式系統(tǒng)電液控制平臺(tái),應(yīng)用模糊控制算法,通過(guò)CoDeSys軟件平臺(tái)對(duì)控制器進(jìn)行二次起升控制系統(tǒng)編程。
[Abstract]:Crawler crane lifting mechanism is one of the most important institutions of crawler cranes, its dynamic characteristics will directly affect the lifting performance of the whole machine. However, at present, the domestic hoisting mechanism of cranes mostly adopts the open hydraulic system, and the fully closed hydraulic system has been implemented abroad.
Compared with the open hydraulic system, the characteristics of the closed hydraulic system is mostly single pump single motor system, and the mechanism of action does not influence each other; smooth transmission, hydraulic shock and low energy loss; full electronic control can achieve two times of hoisting anti down function; less pipeline connection, and the arrangement is convenient; the oil valve simple. A small, low failure probability; reliability design of electronic control system for safety is very important. Therefore, through the establishment of the closed hydraulic control system simulation research on the technology of electronic control system is designed to solve the difficulties, to the closed hydraulic system is widely used in lifting mechanism on the crawler crane has a great practical significance.
The closed system of electro-hydraulic control platform under the background of the research project the research group, research on electronic control technology of closed hydraulic system of the hoisting mechanism of the prevention of two fall phenomenon.
(1) on the basis of studying the principles and characteristics of closed hydraulic system, a two lifting control principle considering factors such as control handle, pressure memory and brake opening time is put forward.
(2) completed the hydraulic and electrical principle design of the closed system electro-hydraulic control platform, and based on the calculation results, the component selection and three-dimensional modeling of the closed system electro-hydraulic control platform were carried out.
(3) the pressure variation equation of the high pressure chamber of the closed hydraulic system with time is derived, and the relation curve between load and pushing handle time and the change curve of load and brake opening time are output.
(4) the simulation system model of the control handle to the motor speed is established, and the effectiveness of the control method is verified by the MATLAB simulation results.
(5) based on the closed system electro-hydraulic control platform, the fuzzy control algorithm is applied to the control system of the controller through the CoDeSys software platform for two hoisting control system programming.

【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類號(hào)】：TH213.7

【引證文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前3條

1 劉永平;閉式液壓系統(tǒng)二次起升動(dòng)態(tài)特性仿真與分析[D];大連理工大學(xué);2012年

2 鮮亞平;超越負(fù)載工況下履帶起重機(jī)閉式液壓系統(tǒng)研究[D];大連理工大學(xué);2012年

3 翁志容;多卷?yè)P(yáng)起升機(jī)構(gòu)均載控制性能仿真[D];大連理工大學(xué);2013年

，

本文編號(hào)：1491010