發(fā)布時(shí)間：2018-01-16 09:51

  本文關(guān)鍵詞：直升機(jī)自動(dòng)傾斜器軸承振動(dòng)采集系統(tǒng)　出處：《南昌航空大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： DSP 振動(dòng)信號(hào)非同步采樣 FFT 能量重心校正法 PCI通信

【摘要】：隨著航空航天技術(shù)的飛速發(fā)展,軍隊(duì)現(xiàn)代化建設(shè)的需要,提高武器裝備質(zhì)量特別是直升機(jī)的質(zhì)量勢(shì)在必行。自動(dòng)傾斜器是直升機(jī)的重要組成部分。為了保證直升機(jī)的飛行安全性,降低直升機(jī)的飛行事故,對(duì)直升機(jī)自動(dòng)傾斜器軸承振動(dòng)進(jìn)行數(shù)據(jù)采集和處理有著十分重要的意義。對(duì)直升機(jī)進(jìn)行故障診斷、健康預(yù)測(cè)是保證直升機(jī)安全、穩(wěn)定運(yùn)行的重要組成部分。直升機(jī)自動(dòng)傾斜器軸承故障分析儀采用當(dāng)前比較流行的虛擬儀器思想,主要由振動(dòng)信號(hào)采集模塊和PC/104工控機(jī)組成。由于該直升機(jī)自動(dòng)傾斜器軸承故障分析儀的實(shí)時(shí)性要求比較高,因此上下位機(jī)之間通過(guò)PCI通信方式實(shí)現(xiàn)數(shù)據(jù)傳輸。PC/104工控機(jī)主要是實(shí)現(xiàn)對(duì)軸承振動(dòng)采集系統(tǒng)的采樣參數(shù)設(shè)置、采樣啟動(dòng)脈沖選擇、采樣觸發(fā)方式選擇、FFT所加的窗函數(shù)選擇以及校準(zhǔn),另外也控制顯示屏顯示采集到的振動(dòng)信號(hào)的特征參數(shù)、波形等。振動(dòng)信號(hào)采集模塊由本設(shè)計(jì)完成,通過(guò)采用32位浮點(diǎn)型DSP芯片TMS320F28335,16位高精度ADS8568實(shí)現(xiàn)了八通道兩種采樣率的采樣,首先用FFT和能量重心校正法對(duì)采集數(shù)據(jù)進(jìn)行處理,然后由PC/104對(duì)其再作進(jìn)一步的研究,因此該分析儀不僅能夠?qū)χ鄙龣C(jī)自動(dòng)傾斜器軸承故障進(jìn)行診斷、預(yù)測(cè),還能夠?qū)ζ渌麄鲃?dòng)信號(hào)、旋翼信號(hào)進(jìn)行故障診斷、健康預(yù)測(cè)。本文從理論分析、方案論證、軟硬件設(shè)計(jì)等幾個(gè)方面詳細(xì)闡述了該直升機(jī)自動(dòng)傾斜器軸承振動(dòng)采集系統(tǒng)的設(shè)計(jì)過(guò)程。首先介紹了該課題研究的背景意義及國(guó)內(nèi)外研究現(xiàn)狀。其次詳細(xì)闡述了該軸承振動(dòng)采集系統(tǒng)采樣方法、頻譜校正算法的選取及實(shí)現(xiàn)過(guò)程。接著在仔細(xì)研究用戶提出的直升機(jī)自動(dòng)傾斜器軸承振動(dòng)采集系統(tǒng)的要求和技術(shù)指標(biāo),并進(jìn)行一定調(diào)研基礎(chǔ)上,給出整體軟硬件實(shí)現(xiàn)方案,采用模塊化思想對(duì)其進(jìn)行分模塊介紹。最后介紹了軟硬件調(diào)試的情況、測(cè)量數(shù)據(jù)的誤差分析等。通過(guò)實(shí)驗(yàn)表明,該軸承故障分析儀具有以下優(yōu)點(diǎn):體積小、重量輕、操作簡(jiǎn)單、攜帶方便。
[Abstract]:With the rapid development of aerospace technology, the military modernization needs. It is imperative to improve the quality of weapon and equipment, especially the quality of helicopter. Automatic tilter is an important part of helicopter. In order to ensure helicopter flight safety and reduce helicopter flight accidents. It is very important to collect and process the data of bearing vibration of helicopter automatic tilter. For helicopter fault diagnosis, health prediction is to ensure helicopter safety. The helicopter automatic tilter bearing fault analyzer adopts the popular idea of virtual instrument at present. It is mainly composed of vibration signal acquisition module and PC/104 industrial control computer. Because of the high real-time requirement of the helicopter automatic tilter bearing fault analyzer. Therefore, the data transmission between upper and lower computers is realized by PCI communication. PC / 104 industrial computer mainly realizes the sampling parameter setting and sampling start pulse selection of bearing vibration acquisition system. Sampling trigger mode to select and calibrate the window function added by FFT, and also control the display screen to display the characteristic parameters of the collected vibration signal, waveform and so on. The vibration signal acquisition module is completed by this design. By using 32-bit floating-point DSP chip TMS320F28335- 16-bit high precision ADS8568, two sampling rates of eight channels are realized. Firstly, the collected data are processed by FFT and energy barycenter correction method, and then further studied by PC/104. Therefore, the analyzer can not only diagnose and predict the bearing fault of helicopter automatic tiller, but also diagnose the other transmission signals and rotor signals, and predict the health. Scheme demonstration. The design process of the helicopter automatic tilter bearing vibration acquisition system is described in detail from several aspects such as hardware and software design. Firstly, the background significance of the research and the status quo of the research at home and abroad are introduced in detail. Secondly, the design process of the helicopter automatic tilter bearing vibration acquisition system is described in detail. The sampling method of bearing vibration acquisition system. The selection and implementation process of spectrum correction algorithm. Secondly, the requirements and technical specifications of the helicopter automatic tiller bearing vibration acquisition system proposed by the user are carefully studied, and a certain amount of research is carried out. The whole hardware and software implementation scheme is given, and the modular idea is used to introduce the module. Finally, the debugging of the hardware and software, the error analysis of the measurement data and so on are introduced. The bearing fault analyzer has the following advantages: small volume, light weight, simple operation and easy to carry.
【學(xué)位授予單位】：南昌航空大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：V275.1

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本文編號(hào)：1432587