本文選題：微弧氧化　切入點(diǎn)：DSP　出處：《太原理工大學(xué)》2017年碩士論文

【摘要】：微弧氧化是一種能提高Al、Mg、Ti等金屬及其合金表面耐腐蝕性能、耐磨損性能的表面處理方法。其工藝流程簡(jiǎn)單、環(huán)境污染小、對(duì)材料的適應(yīng)性寬,廣泛應(yīng)用于航空、航天、化工、電子、醫(yī)療等領(lǐng)域。在微弧氧化過(guò)程中,電源參數(shù)的變化將對(duì)膜層的生長(zhǎng)和形態(tài)產(chǎn)生影響,是成膜質(zhì)量的關(guān)鍵因素。目前,微弧氧化電源主要存在恒壓或恒流兩種模式,往往需要提前預(yù)設(shè),在微弧氧化過(guò)程中固定不變,不利于研究微弧氧化過(guò)程中變化電參數(shù)對(duì)成膜的影響。因此,為了對(duì)微弧氧化過(guò)程的電參量進(jìn)行實(shí)時(shí)控制,擬在實(shí)驗(yàn)室中設(shè)計(jì)一種通過(guò)在線編程控制電源輸出、能對(duì)一定條件下膜層性能進(jìn)行預(yù)測(cè)的微弧氧化智能系統(tǒng)。在分析微弧氧化系統(tǒng)特點(diǎn)的基礎(chǔ)上,構(gòu)建整體結(jié)構(gòu)和設(shè)計(jì)各功能模塊。微弧氧化智能系統(tǒng)按功能劃分為電解槽、冷卻模塊、攪拌模塊、溫度監(jiān)測(cè)系統(tǒng)及電源監(jiān)測(cè)與控制系統(tǒng)。其中,電源監(jiān)測(cè)與控制系統(tǒng)的設(shè)計(jì)是最主要的部分,包含硬件設(shè)計(jì)和軟件設(shè)計(jì)。硬件設(shè)計(jì)包括主電路設(shè)計(jì)和控制系統(tǒng)電路設(shè)計(jì)。電源主電路工作過(guò)程為整流-逆變-升壓-整流-斬波�？刂葡到y(tǒng)電路以數(shù)字信號(hào)處理器(DSP,本文采用TMS320F28335)作為控制芯片。DSP與UC3846配合驅(qū)動(dòng)逆變電路、與2SD315A集成驅(qū)動(dòng)模塊配合驅(qū)動(dòng)斬波電路。通過(guò)A/D模塊對(duì)電壓、電流和溫度等模擬量信號(hào)進(jìn)行采集。軟件設(shè)計(jì)涉及DSP嵌入式程序設(shè)計(jì)和上位機(jī)的人機(jī)接口界面設(shè)計(jì)。DSP嵌入式程序主要是完成數(shù)據(jù)的處理,通過(guò)對(duì)采集到的電壓、電流信號(hào),按設(shè)計(jì)的PID算法對(duì)其進(jìn)行處理,實(shí)現(xiàn)對(duì)輸出信號(hào)的閉環(huán)控制。上位機(jī)完成對(duì)電壓與電流數(shù)字或波形顯示、對(duì)電源控制參數(shù)進(jìn)行在線設(shè)置和通過(guò)BP神經(jīng)網(wǎng)絡(luò)對(duì)氧化膜層性能進(jìn)行預(yù)測(cè)。使用自制微弧氧化系統(tǒng),通過(guò)程序設(shè)定電源分階段輸出占空比不同的脈沖,分析該條件下對(duì)TC4合金氧化膜耐蝕性的影響。采用MATLAB設(shè)計(jì)BP神經(jīng)網(wǎng)絡(luò)模型,通過(guò)對(duì)實(shí)驗(yàn)樣本進(jìn)行訓(xùn)練和檢驗(yàn),證明此模型對(duì)微弧氧化層的耐蝕性能有一定的預(yù)測(cè)能力。本系統(tǒng)可以程序或?qū)崟r(shí)控制電源參數(shù),方便對(duì)微弧氧化過(guò)程進(jìn)行過(guò)程監(jiān)控,為實(shí)驗(yàn)室研究微弧氧化提供設(shè)備保障。
[Abstract]:Micro-arc oxidation is a surface treatment method which can improve the corrosion resistance and wear resistance of Al _ 2O _ 3 / mg _ (Ti) and its alloys.Its process is simple, environmental pollution is small, adaptability to materials is wide, widely used in aviation, aerospace, chemical, electronic, medical and other fields.In the process of micro-arc oxidation, the change of power supply parameters will affect the growth and morphology of the film, which is the key factor of film forming quality.At present, there are two main modes of micro-arc oxidation power supply: constant voltage or constant current, which often need to be preset in advance and fixed in the process of micro-arc oxidation, which is not conducive to the study of the influence of electric parameters on film formation during the process of micro-arc oxidation.Therefore, in order to control the electrical parameters in the process of micro-arc oxidation in real time, an intelligent micro-arc oxidation system is designed in the laboratory, which can control the output of the power supply by on-line programming and can predict the performance of the film under certain conditions.On the basis of analyzing the characteristics of microarc oxidation system, the whole structure and the design of each functional module are constructed.The intelligent system of micro-arc oxidation is divided into electrolysis cell, cooling module, mixing module, temperature monitoring system and power monitoring and control system according to its function.Among them, the design of power monitoring and control system is the most important part, including hardware design and software design.Hardware design includes main circuit design and control system circuit design.The main circuit of power supply works as rectifier-inverter-boost-rectifier-chopper.Digital signal processor (DSP) is used in the control system. TMS320F28335 (TMS320F28335) is used as the control chip. DSP works with UC3846 to drive inverter, and 2SD315A integrated driver module drives chopper circuit.The analog signals such as voltage, current and temperature are collected by A / D module.The software design involves the embedded program design of DSP and the interface design of man-machine interface of host computer. The embedded program of DSP is mainly to complete the data processing. The voltage and current signals collected are processed according to the designed PID algorithm.The closed-loop control of the output signal is realized.The upper computer displays the voltage and current digital or waveform, sets the control parameters of the power supply online and predicts the performance of the oxide film by BP neural network.By using a self-made micro-arc oxidation system, the effect of different pulse duty ratio on the corrosion resistance of TC4 alloy oxide film was analyzed.BP neural network model was designed by MATLAB. By training and testing the experimental samples, it is proved that the model has certain predictive ability to the corrosion resistance of micro-arc oxidation layer.The system can control the parameters of power supply in program or in real time, which can monitor the process of micro-arc oxidation and provide equipment guarantee for laboratory research on micro-arc oxidation.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TG173

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 李淑華,程金生,尹玉軍,辛文彤,楊潤(rùn)澤;微弧氧化過(guò)程中電流和電壓變化規(guī)律的探討[J];特種鑄造及有色合金;2001年03期

2 趙樹(shù)萍;鈦合金微弧氧化對(duì)其性能的影響[J];鈦工業(yè)進(jìn)展;2001年06期

3 趙樹(shù)萍 ,呂雙坤;在工業(yè)中采用鈦合金的微弧氧化[J];鈦工業(yè)進(jìn)展;2003年01期

4 解念鎖;武立志;;鈦合金表面微弧氧化的影響因素及其應(yīng)用[J];熱加工工藝;2011年12期

5 趙樹(shù)萍;鈦合金微弧氧化對(duì)其性能的影響及微弧氧化鍍層的特殊性能[J];國(guó)外金屬熱處理;2002年05期

6 趙樹(shù)萍;微弧氧化耐腐蝕涂層[J];石油化工腐蝕與防護(hù);2004年01期

7 李建中,邵忠財(cái),田彥文,翟玉春,郝清偉;不同含磷電解液在微弧氧化過(guò)程中的作用[J];中國(guó)腐蝕與防護(hù)學(xué)報(bào);2004年04期

8 劉全心,蔡啟舟,王立世,魏伯康;微弧氧化中火花形態(tài)的變化規(guī)律[J];輕合金加工技術(shù);2005年05期

9 賀永勝,趙志龍,劉一洋,劉林;鋁合金微弧氧化熱力學(xué)機(jī)理及影響因素的分析[J];電鍍與環(huán)保;2005年06期

10 李鶴岐;趙介勇;李春旭;劉紀(jì)周;陳克選;;大功率微弧氧化電源的研制——主電路的設(shè)計(jì)[J];電焊機(jī);2005年11期

相關(guān)會(huì)議論文 前10條

1 來(lái)永春;杜建成;施修齡;華m:;丁曉紀(jì);;等離子體在微弧氧化中的作用[A];'2001全國(guó)荷電粒子源、粒子束學(xué)術(shù)會(huì)議論文集[C];2001年

2 憨勇;徐可為;;鈦合金微弧氧化(碳氮化)的生物醫(yī)用改性研究進(jìn)展[A];第七屆全國(guó)表面工程學(xué)術(shù)會(huì)議暨第二屆表面工程青年學(xué)術(shù)論壇論文集（一）[C];2008年

3 王琳;任力;王迎軍;;微弧氧化純鈦金屬表面的細(xì)胞外基質(zhì)化修飾[A];2013廣東材料發(fā)展論壇——戰(zhàn)略性新興產(chǎn)業(yè)發(fā)展與新材料科技創(chuàng)新研討會(huì)論文摘要集[C];2013年

4 宋希劍;;微弧氧化及其在高硅鑄鋁和高含銅硬鋁零部件的應(yīng)用[A];第五屆全國(guó)表面工程學(xué)術(shù)會(huì)議論文集[C];2004年

5 嚴(yán)川偉;杜克勤;段紅平;劉津義;王福會(huì);;鎂合金的微弧氧化及腐蝕防護(hù)[A];2006年全國(guó)腐蝕電化學(xué)及測(cè)試方法學(xué)術(shù)會(huì)議論文集[C];2006年

6 蔣百靈;楊巍;蘇陽(yáng);;微弧氧化與磁控濺射的工程應(yīng)用[A];第九次全國(guó)熱處理大會(huì)論文集（一）[C];2007年

7 朱e，

本文編號(hào)：1713793