數(shù)字控制實(shí)現(xiàn)軸向柱塞多功能變量泵的研究
本文選題:軸向柱塞變量泵 + 數(shù)字控制; 參考:《太原科技大學(xué)》2012年碩士論文
【摘要】:斜盤(pán)式軸向柱塞變量泵廣泛應(yīng)用于工程機(jī)械和注塑機(jī)上,它的節(jié)能性、低噪聲和電液比例技術(shù)已經(jīng)成為軸向柱塞變量泵的重要發(fā)展方向。但是,目前軸向柱塞變量泵的關(guān)鍵技術(shù)仍被國(guó)外大公司壟斷,國(guó)內(nèi)的研究、制造及生產(chǎn)大都還處于初級(jí)開(kāi)發(fā)階段。技術(shù)上的差距造成了柱塞泵噪聲大、穩(wěn)定性差、響應(yīng)慢、壽命短和可靠性低等缺點(diǎn)。為此,開(kāi)展軸向柱塞變量泵關(guān)鍵技術(shù)的分析研究,對(duì)于提高我國(guó)液壓元件產(chǎn)品的國(guó)際競(jìng)爭(zhēng)力具有重要的經(jīng)濟(jì)意義、社會(huì)意義和工程應(yīng)用價(jià)值。 1.注塑機(jī)對(duì)變量泵的節(jié)能、壓力流量穩(wěn)定性方面要求較高,對(duì)電液比例軸向柱塞變量泵在變工況條件下壓力流量控制穩(wěn)定性的研究具有重要意義。 2.軸向柱塞泵變量機(jī)構(gòu)的分析研究。根據(jù)柱塞泵變量機(jī)理建立數(shù)學(xué)模型,分析影響壓力流量動(dòng)態(tài)性能的關(guān)鍵因素。通過(guò)仿真分析調(diào)整相關(guān)參數(shù),使其有利于系統(tǒng)動(dòng)態(tài)特性的提高并降低因斜盤(pán)不穩(wěn)定而產(chǎn)生的壓力流量波動(dòng)。 3.數(shù)字控制實(shí)現(xiàn)多功能軸向柱塞變量泵是在原有變量泵A4VSO的基礎(chǔ)上增設(shè)電液比例閥及各種傳感器裝置實(shí)現(xiàn)的,,即利用電——機(jī)械轉(zhuǎn)換和比例閥來(lái)操縱變量機(jī)構(gòu)。這樣做不但簡(jiǎn)化了變量泵的結(jié)構(gòu)、并且可以通過(guò)控制策略的變化來(lái)實(shí)現(xiàn)壓力、流量、功率控制切換時(shí)的穩(wěn)定性。 4.按照A4VSO變量泵的性能要求,根據(jù)伺服比例閥的特性及傳感器的特性選擇了相應(yīng)的型號(hào)。根據(jù)柱塞變量泵的壓力、流量、功率以及復(fù)合控制原理建立了數(shù)學(xué)模型。 5.論文采用PID控制方式,設(shè)計(jì)了最小值控制器。在MATLAB/SIMULINK仿真環(huán)境下,分析了在各種工況下——壓力、流量、功率、復(fù)合控制以及在控制方式變換時(shí)壓力、流量的波動(dòng)曲線情況,確定了控制器中設(shè)置的參數(shù),達(dá)到了穩(wěn)態(tài)切換的目的和多功能變量的效果。 6.在Simulnk仿真的基礎(chǔ)上,利用MATLAB/RTW將變量泵Simulink仿真模型中的控制器模塊轉(zhuǎn)化為可讀性強(qiáng)、效率高、實(shí)時(shí)性較好的程序源代碼。這種快速開(kāi)發(fā)方法降低了成本、節(jié)省了大量編寫(xiě)程序的時(shí)間、大大提高了產(chǎn)品的開(kāi)發(fā)速度。
[Abstract]:The skew disc axial piston variable pump is widely used in engineering machinery and injection molding machine. Its energy saving, low noise and electro-hydraulic proportional technology have become an important development direction of axial piston pump. However, the key technology of axial piston pump is still broken by large companies abroad, and the domestic research, manufacturing and production are mostly in the field. In the primary stage of development, the technical gap causes the piston pump with large noise, poor stability, slow response, short life and low reliability. Therefore, it is of great economic significance, social significance and engineering application value to carry out the analysis and study of the key technology of axial piston variable pump for improving the international competitiveness of our hydraulic components.
1. the injection machine has a high requirement for the energy saving of variable pump and the stability of pressure flow. It is of great significance to study the stability of the pressure flow control of the electro-hydraulic proportional axial piston pump under the condition of variable working condition.
The analysis and study of the variable mechanism of the 2. axial piston pump. Based on the variable mechanism of the piston pump, a mathematical model is set up to analyze the key factors affecting the dynamic performance of the pressure flow. The relevant parameters are adjusted by the simulation analysis, so that it is beneficial to the improvement of the dynamic characteristics of the system and the reduction of the pressure flow fluctuation caused by the instability of the inclined disk.
3. digital control realization of multi-function axial piston variable pump is realized by adding electro-hydraulic proportional valve and various sensor devices on the basis of the original variable pump A4VSO, that is, using electric mechanical conversion and proportional valve to manipulate the variable mechanism, which not only simplifies the structure of the variable pump, but also can be realized through the change of control strategy. Pressure, flow, and power control the stability of the switch.
4. according to the performance requirements of the A4VSO variable pump, the corresponding model is selected according to the characteristics of the servo proportional valve and the characteristics of the sensor. The mathematical model is established according to the pressure, flow, power and the compound control principle of the piston variable pump.
5. the minimum value controller is designed by using PID control mode. Under the MATLAB/SIMULINK simulation environment, the pressure, flow, power, compound control and the fluctuation curve of pressure and flow are analyzed in various working conditions. The parameters set in the controller are determined, and the purpose of steady state switching and multi work are achieved. The effect of a variable.
6. on the basis of Simulnk simulation, the controller module in the variable pump Simulink simulation model is transformed into a program source code with high readability, high efficiency and better real-time performance using MATLAB/RTW. This rapid development method reduces the cost, saves a lot of programming time, and greatly improves the development speed of the product.
【學(xué)位授予單位】:太原科技大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2012
【分類號(hào)】:TH137.51
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