本文關(guān)鍵詞： 水壓技術(shù) 同步控制 PID 模糊控制 神經(jīng)網(wǎng)絡(luò)　出處：《蘭州理工大學(xué)》2011年碩士論文　論文類型：學(xué)位論文

【摘要】：水壓技術(shù)是流體傳動(dòng)領(lǐng)域的重要研究方向,符合節(jié)能、環(huán)保、可持續(xù)發(fā)展的要求,具有很廣泛的應(yīng)用前景。水壓雙缸同步控制是水壓系統(tǒng)中的重要應(yīng)用領(lǐng)域之一,具有結(jié)構(gòu)簡單,介質(zhì)無污染,綠色環(huán)保,阻燃等優(yōu)點(diǎn),已在食品、醫(yī)藥等對環(huán)境要求較高的場合有著廣泛的運(yùn)用,并且隨著科學(xué)技術(shù)的不斷發(fā)展,水壓技術(shù)的應(yīng)用領(lǐng)域也會(huì)越來越廣。 結(jié)合國內(nèi)外水壓技術(shù)和同步控制系統(tǒng)的發(fā)展現(xiàn)狀,針對主從式水壓雙缸同步控制系統(tǒng)在運(yùn)行過程中存在同步效果不理想的問題,對比了水壓系統(tǒng)與油壓系統(tǒng)的特點(diǎn)和難點(diǎn);分析了不同同步控制元件的特點(diǎn)和不同同步控制結(jié)構(gòu)的同步誤差;研究了同步控制策略。重點(diǎn)做了如下研究: 建立主從式水壓雙缸同步控制系統(tǒng)的數(shù)學(xué)模型,重點(diǎn)是水壓比例流量閥和水壓缸的數(shù)學(xué)模型,對系統(tǒng)進(jìn)行穩(wěn)定性和動(dòng)態(tài)性能的分析,并研究負(fù)載對水壓缸固有頻率和阻尼比以及整個(gè)控制系統(tǒng)的影響。 針對系統(tǒng)的動(dòng)態(tài)性能不理想,一般設(shè)計(jì)常規(guī)PID控制器對系統(tǒng)進(jìn)行校正,并采用臨界比例度法對PID參數(shù)進(jìn)行整定。但是由于系統(tǒng)存在時(shí)變,非線性等因素,常規(guī)PID控制很難適應(yīng)系統(tǒng)參數(shù)變化,控制效果不是很理想。設(shè)計(jì)模糊自整定PID控制器實(shí)現(xiàn)PID控制器參數(shù)的在線調(diào)整,超調(diào)量小,快速性好,并且兩水壓缸的位移跟隨情況較好,兩缸同步位移差值較小,控制效果明顯優(yōu)于常規(guī)PID控制。最后提出了基于BP神經(jīng)網(wǎng)絡(luò)模糊PID控制技術(shù),將模糊控制與神經(jīng)網(wǎng)絡(luò)控制結(jié)合起來,實(shí)現(xiàn)控制器的在線自學(xué)習(xí)功能,其響應(yīng)時(shí)間,超調(diào)量,穩(wěn)態(tài)精度等綜合控制效果優(yōu)于模糊自整定PID控制,能更好的提高同步控制效果,可以使水壓雙缸同步系統(tǒng)實(shí)現(xiàn)高精度的同步跟隨。
[Abstract]:Hydraulic technology is an important research direction in the field of fluid transmission, which meets the requirements of energy saving, environmental protection and sustainable development. Water pressure dual cylinder synchronous control is one of the important application fields in water pressure system. It has many advantages such as simple structure, no pollution of medium, green environment, flame retardant and so on. With the development of science and technology, the application of water pressure technology will be more and more extensive. Combined with the development of water pressure technology and synchronous control system at home and abroad, there is a problem that the synchronization effect is not ideal in the operation process of the master and slave water pressure double cylinder synchronous control system. The characteristics and difficulties of water pressure system and oil pressure system are compared. The characteristics of different synchronous control elements and the synchronization errors of different synchronous control structures are analyzed. The synchronization control strategy is studied. The mathematical model of the master-slave hydraulic double cylinder synchronous control system is established. The emphasis is on the mathematical model of the hydraulic proportional flow valve and the hydraulic cylinder. The stability and dynamic performance of the system are analyzed. The influence of load on the natural frequency and damping ratio of hydraulic cylinder and the whole control system is studied. In view of the unsatisfactory dynamic performance of the system, a conventional PID controller is generally designed to correct the system, and the critical ratio method is used to adjust the PID parameters. However, because of the time-varying of the system. Nonlinear factors such as conventional PID control is difficult to adapt to the system parameters change the control effect is not very ideal design of fuzzy self-tuning PID controller to achieve on-line adjustment of PID controller parameters small overshoot. The speed is good, and the displacement of the two hydraulic cylinders follows better, and the displacement difference between the two cylinders is small. The control effect is obviously superior to the conventional PID control. Finally, the fuzzy PID control technology based on BP neural network is proposed, which combines the fuzzy control with the neural network control to realize the on-line self-learning function of the controller. The response time, overshoot, steady-state precision and so on are better than fuzzy self-tuning PID control, which can improve the synchronous control effect better, and make the water pressure double-cylinder synchronous system achieve high-precision synchronous follow.
【學(xué)位授予單位】：蘭州理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類號(hào)】：TH137

【引證文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前4條

1 高繼良;三平動(dòng)并聯(lián)機(jī)構(gòu)傳動(dòng)動(dòng)力學(xué)和雙軸同步控制研究[D];南京理工大學(xué);2012年

2 薛風(fēng)國;溫度校準(zhǔn)系統(tǒng)及校準(zhǔn)方法研究[D];南京信息工程大學(xué);2012年

3 高爽;福源選煤廠精煤自動(dòng)裝車系統(tǒng)的研究[D];遼寧工程技術(shù)大學(xué);2012年

4 李斌;動(dòng)閥套位移反饋比例方向閥的特性分析及試驗(yàn)研究[D];浙江大學(xué);2013年

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本文編號(hào)：1480905