本文選題：氣缸 + Wi-Fi技術(shù)�。� 參考：《電子科技大學》2017年碩士論文

【摘要】：二十一世紀以來,無線技術(shù)的迅猛發(fā)展不僅改變了人們的生活,也推動了工業(yè)自動化技術(shù)發(fā)生革命性的變化。隨著智能制造在氣動領(lǐng)域的應(yīng)用,氣動系統(tǒng)對高速無線化的需求與日俱增。Wi-Fi作為目前最廣泛使用的短距離高速無線傳輸解決方案,開始逐步進入工業(yè)氣動領(lǐng)域。氣動現(xiàn)場對數(shù)據(jù)傳輸實時性有嚴格的技術(shù)指標,包括實時性要求方面的高通信速率和低通信時延,因此針對氣動控制需求研究并設(shè)計一套基于高速無線通信技術(shù)的氣動傳輸網(wǎng)絡(luò)系統(tǒng)是極為必要的。本文分析了氣動系統(tǒng)工作原理以及氣動執(zhí)行元件氣缸的特點,明確了課題的設(shè)計需求。通過無線通信技術(shù)現(xiàn)狀的文獻調(diào)研,對比分析技術(shù)特性,最終確定了以Wi-Fi作為氣缸無線傳輸網(wǎng)絡(luò)系統(tǒng)的技術(shù)路徑。在此基礎(chǔ)上進行了深入的研究,主要研究內(nèi)容如下:(1)通過網(wǎng)絡(luò)拓撲結(jié)構(gòu)對比和Wi-Fi協(xié)議棧特性分析構(gòu)建了系統(tǒng)框架,確定了系統(tǒng)總體設(shè)計方案。并根據(jù)狀態(tài)轉(zhuǎn)移概率針對系統(tǒng)通信過程建立了Markov數(shù)學仿真參考模型,通過MATLAB軟件對其進行仿真分析,進一步計算得到通信時延期望。為本課題實驗以及相關(guān)領(lǐng)域研究提供參考依據(jù)。(2)確定了“雙核心”硬件架構(gòu),采用PCB設(shè)計軟件Altium Designer對系統(tǒng)硬件電路進行設(shè)計,完成了實驗平臺的搭建,包括:雙主控芯片選型,節(jié)點單元電路設(shè)計,分離式Wi-Fi模組設(shè)計,下載模塊設(shè)計以及轉(zhuǎn)接板設(shè)計。(3)采用集成Wi-Fi內(nèi)核SDK的Eclipse軟件和面向嵌入式程序設(shè)計的Keil軟件分別實現(xiàn)了對Wi-Fi傳輸控制程序設(shè)計和節(jié)點單元處理程序設(shè)計,并完成了通信協(xié)議的制定。為保障高通信速率、低通信時延和高可靠性,針對不同的傳輸模式,采用了不同的控制策略,重點研究并設(shè)計了相應(yīng)的控制算法,優(yōu)化了傳輸方案,取得了良好的效果。(4)基于硬件實驗平臺,對不同實驗環(huán)境,配置條件,傳輸模式以及控制方案下的Wi-Fi通信進行測試,通過改變實驗參數(shù),得到通信時延關(guān)于各個影響因素的變化曲線。大量實驗為應(yīng)用程序的設(shè)計提供反饋,促進軟件迭代優(yōu)化,實驗結(jié)果也驗證了氣缸Wi-Fi無線傳輸網(wǎng)絡(luò)系統(tǒng)的可行性和較高的參考應(yīng)用價值。
[Abstract]:Since 21 century, the rapid development of wireless technology has not only changed people's lives, but also promoted the revolutionary change of industrial automation technology. With the application of intelligent manufacturing in pneumatic field, the demand for high-speed wireless in pneumatic system is increasing. Wi-Fi, as the most widely used short-range high-speed wireless transmission solution at present, has gradually entered the industrial pneumatic field. Pneumatic field has strict technical specifications for real-time data transmission, including high communication rate and low communication delay. Therefore, it is necessary to research and design a pneumatic transmission network system based on high speed wireless communication technology. The working principle of pneumatic system and the characteristics of pneumatic actuator cylinder are analyzed in this paper. Through the literature investigation of the current situation of wireless communication technology and the comparative analysis of the technical characteristics, the technical path of the cylinder wireless transmission network system based on Wi-Fi is finally determined. The main contents are as follows: 1) based on the comparison of network topology and the characteristic analysis of Wi-Fi protocol stack, the system framework is constructed, and the overall design scheme of the system is determined. According to the state transition probability, the Markov mathematical simulation reference model is established for the communication process of the system. The simulation analysis is carried out through the MATLAB software, and the expectation of the communication delay is further calculated. The hardware structure of "double core" is determined. The hardware circuit of the system is designed by PCB software Altium Designer, and the experimental platform is built, including the selection of dual master control chip. Node unit circuit design, split Wi-Fi module design, Download module design and switch board design. 3) using Eclipse software integrated with Wi-Fi kernel SDK and Keil software oriented to embedded program design, the design of Wi-Fi transmission control program and node unit processing program are implemented, respectively. And has completed the communication protocol formulation. In order to guarantee high communication rate, low communication delay and high reliability, different control strategies are adopted for different transmission modes. The corresponding control algorithms are studied and designed, and the transmission scheme is optimized. Good results are obtained. Based on the hardware experimental platform, the Wi-Fi communication under different experimental environment, configuration conditions, transmission mode and control scheme is tested, and the experimental parameters are changed. The variation curve of communication delay about each factor is obtained. A large number of experiments provide feedback for application program design and promote software iterative optimization. The experimental results also verify the feasibility and high reference value of cylinder Wi-Fi wireless transmission network system.
【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TH138.51;TN92

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