本文選題：電液比例泵控馬達(dá) + 系統(tǒng)辨識　； 參考：《長安大學(xué)》2014年碩士論文

【摘要】：隨著電液比例控制技術(shù)的迅速發(fā)展，其可以作為微電子技術(shù)與液壓技術(shù)間的接口，進(jìn)一步擴大了泵控馬達(dá)系統(tǒng)的應(yīng)用。為了使液壓系統(tǒng)能夠滿足生產(chǎn)過程對系統(tǒng)性能的更高要求，，必須提高液壓系統(tǒng)的響應(yīng)特性及工作可靠性，而建立系統(tǒng)的精確模型則是進(jìn)一步改進(jìn)和完善系統(tǒng)設(shè)計的基礎(chǔ)。本論文通過實驗，利用所得實驗數(shù)據(jù)、結(jié)合Matlab軟件、運用ARX和ARMAX模型辨識方法對電液比例泵控馬達(dá)系統(tǒng)進(jìn)行了實驗辨識，并對系統(tǒng)施加控制策略進(jìn)行了仿真分析。主要做的工作如下： （1）對電液比例控制技術(shù)和系統(tǒng)辨識理論的發(fā)展和現(xiàn)狀進(jìn)行了簡要概述，總結(jié)了泵控馬達(dá)系統(tǒng)建模的重要性及進(jìn)行辨識建模的必要性，并對實驗臺及泵控馬達(dá)模塊進(jìn)行了介紹。 （2）根據(jù)泵控馬達(dá)系統(tǒng)各模塊所遵循的物理規(guī)律分別進(jìn)行了理論建模，在此基礎(chǔ)上獲得了系統(tǒng)的傳遞函數(shù)，為后面辨識建模提供了先驗知識。 （3）合理設(shè)計實驗，采集辨識所需數(shù)據(jù)。利用Matlab系統(tǒng)辨識工具箱函數(shù)分析處理觀測數(shù)據(jù)，運用最小二乘法和增廣最小二乘法對系統(tǒng)的ARX和ARMAX模型進(jìn)行實驗辨識，并對辨識模型進(jìn)行殘差相關(guān)性分析和驗證，在兩種模型辨識方法所得辨識模型比較后，最終獲得符合要求的系統(tǒng)模型。 （4）根據(jù)實驗辨識所得的系統(tǒng)模型，利用斜坡、階躍、正弦三種信號作為仿真輸入信號，分別針對系統(tǒng)的靜態(tài)、動態(tài)和跟隨響應(yīng)進(jìn)行了仿真分析，從仿真分析結(jié)果知道，運用PID控制策略后系統(tǒng)的響應(yīng)時間、超調(diào)量、穩(wěn)態(tài)誤差和跟隨性能都得到顯著改善，可以滿足系統(tǒng)的性能要求。 系統(tǒng)辨識作為一種精確地建模方法，其不必對所要辨識的系統(tǒng)進(jìn)行深入的了解，只需設(shè)計一個充分包含進(jìn)行系統(tǒng)辨識所需信息的實驗，就可以獲得所需的系統(tǒng)模型。本論文充分利用Matlab系統(tǒng)辨識工具箱及Simulink模塊的強大功能對電液比例泵控馬達(dá)系統(tǒng)進(jìn)行了建模和仿真分析，將為后續(xù)的泵控馬達(dá)系統(tǒng)設(shè)計及控制策略分析提供一定的參考意義。
[Abstract]:With the rapid development of electro-hydraulic proportional control technology, it can be used as the interface between microelectronic technology and hydraulic technology, which further expands the application of pump control motor system. In order to make the hydraulic system meet the higher requirements of the system performance in the production process, it is necessary to improve the response characteristics and working reliability of the hydraulic system, and the establishment of the accurate model of the system is the basis for further improvement and improvement of the system design. In this paper, we use the experimental data and Matlab software to identify the electro-hydraulic proportional pump control motor system by using ARX and ARMAX model identification method, and analyze the applied control strategy of the system. The main works are as follows: (1) the development and current situation of electro-hydraulic proportional control technology and system identification theory are briefly summarized, and the importance of modeling of pump controlled motor system and the necessity of identification modeling are summarized. The experimental platform and the pump motor module are introduced. (2) according to the physical laws of the pump motor system, the theoretical modeling is carried out, and the transfer function of the system is obtained. A priori knowledge is provided for the later identification modeling. (3) the experiment is designed reasonably and the data needed for identification is collected. The system identification toolbox function of Matlab is used to analyze and process the observation data, and the ARX and ARMAX models of the system are identified by the least square method and the augmented least square method, and the residual correlation analysis and verification of the identification model are carried out. After comparing the two identification models, the system model that meets the requirements is obtained. (4) according to the system model identified by experiments, three kinds of signals, slope, step and sinusoidal, are used as simulation input signals. The simulation results show that the response time, overshoot, steady-state error and follow performance of the system are improved significantly by using pid control strategy. Can meet the performance requirements of the system. As an accurate modeling method, system identification does not need to understand the system to be identified in depth. It only needs to design an experiment that contains the information needed for system identification, and then the required system model can be obtained. This paper makes full use of the powerful functions of Matlab system identification toolbox and Simulink module to model and simulate the electro-hydraulic proportional pump motor system, which will provide some reference significance for the subsequent design of pump control motor system and the analysis of control strategy.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TH137.51

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本文編號：2106947