【正文】 框內(nèi)打 ―√‖ ） 學(xué)位論文作者簽名： 導(dǎo)師簽名： 日期： 年 月 日 日期： 年 月 日 數(shù)字式高精度軸角解算研究 I 摘要 旋轉(zhuǎn)變壓器是一種高可靠性的角度測量傳 感器，具有耐沖擊、耐高溫、耐油污、高可靠、長壽命等優(yōu)點(diǎn)，因此廣泛 地 應(yīng)用于雷達(dá)、坦克、地炮火控、機(jī)器人、汽車、電力、冶金、紡織、印刷等領(lǐng)域。傳統(tǒng)的數(shù)據(jù)轉(zhuǎn)換模塊由專用集成芯片加外圍電路構(gòu)成，專用集成芯片 分為 模擬式和數(shù)字式兩種。由于數(shù)字解算算法實(shí)現(xiàn)難度較大，國內(nèi)尚無該類型芯片。 本文的工作內(nèi)容主要集中在以下幾個(gè)方面：針對固定帶寬無法兼顧響應(yīng)速度和解算精度的問題，提出了動(dòng)態(tài)帶寬調(diào)整算法 。針對誤差計(jì)算環(huán)節(jié)中正余弦值直接計(jì)算計(jì)算量大、查表法占用空間大的問題，設(shè)計(jì)了基于CORDIC 算法的誤差計(jì)算環(huán)節(jié)，減少了計(jì)算量、節(jié)省了存儲(chǔ)空間。針對信號噪聲采用了 FIR 濾波器和累加采樣方案，有效的減少了噪聲對精度的影響。驗(yàn)證結(jié)果顯示軸角 179176。、分辨率達(dá)到 18 位、抖碼控制在1LSB。 關(guān)鍵詞 ：數(shù)字化軸角解算；旋轉(zhuǎn)變壓器； CORDIC；系統(tǒng)設(shè)計(jì)； DSP 中國艦船研究院碩士學(xué)位論文 II Abstract Resolver is a kind of highly reliable angle measurement device, which is resistant to impact, high temperature and oil. Its highreliability and long life make it a widely use in military field and industry filed, such as radar, fire control , tanks, robotics, automotive, power, metallurgy, textile printing and so on. The output of resolver is AC analog signals, it must be converted to digital signals before enter the puter. The shaft conversion module in tradition bines special shaft conversion chip and peripheral circuit. The special shaft conversion chip can be separate to analog mode and digital mode. Analogmode chip has highprecision, highstability and no data jitter, its disadvantages includes: low tracking speed, highprice. Digitalmode chip with its high tracking speed and low price give the new direction of shaft conversion. its plex algorithm, low accuracy and data jitter make it difficult to realize. In view of this situation, the subject of the digital highprecision axis angle solver depth study. The work of this paper focuses on the following aspects: Account the shorting of fixed bandwidth can not ensure the speed and accuracy at the same time, proposed a dynamic bandwidth algorithm witch improved the accuracy with a fast step response. Design a new error calculationg method based on CORDIC algorithm instead of direct calculation witch take lots of time or look up witch take largue space. For digital code solver shake severe cases, proposed the most dynamic and static judgments and median filtering method, effectively reduced the number of data jitter, and controlled the jitter amplitude. To reduce the impact of the noise, use the FIR filter and cumulative sampling program. Finally, the algorithm was verified on the ΣΔAD and DSPbased hardware platform. The result indicate that the angle resolution reached 18, the 179176。 resolver。 system design。 參考文獻(xiàn) ........................................................................................ 78 碩士在讀期間發(fā)表文章 ............................................................... 81 附錄 ........................................................................................... 82 CORDIC 算法 .............................................................................................. 82 SCI 接口 ........................................................................................................ 82 FIR 濾波器 .................................................................................................... 83 PWM 代碼 .................................................................................................... 83 中國艦船研究院碩士學(xué)位論文 VI 圖目錄 圖 旋轉(zhuǎn)變壓器原理圖 ................................................................................... 4 圖 旋轉(zhuǎn)變壓器信號與角度關(guān)系圖 ............................................................... 5 圖 SCOTT 變壓器 ......................................................................................... 6 圖 軸角解算算法分類 ................................................................................. 10 圖 反正切法結(jié)構(gòu)框圖 ..................................................................................11 圖 線性化解算基本結(jié)構(gòu) ............................................................................. 12 圖 PT， Vo ， E 與角度之間的關(guān)系圖 ......................................................... 13 圖 定子接參考示意圖 ................................................................................. 13 圖 鑒相解算框圖 ......................................................................................... 14 圖 鑒幅解算 ............................................................................................... 15 圖 解算框圖 ............................................................................................... 15 圖 AD2S83 推薦電路 ................................................................................ 17 圖 AD2S83 原理框圖 ................................................................................ 18 圖 相敏調(diào)節(jié)作用 ....................................................................................... 18 圖 相敏調(diào)節(jié)電路 ....................................................................................... 18 圖 VCO 電路框圖 ...................................................................................... 19 圖 AD2S1210 推薦電路 ............................................................................ 20 圖 緩沖電路 ............................................................................................... 21 圖 AD2S1210 框圖 .................................................................................... 22 圖 DSP 內(nèi)部模塊 ......................................................................................... 25 圖 增加開環(huán)零點(diǎn) ......................................................................................... 26 圖 加入超前校正控制環(huán)的系統(tǒng)框圖 ......................................................... 26 圖 am?? 的曲線 ........................................................................................ 28 圖 矯正前后幅頻特性 ................................................................................. 28 圖 不同帶寬下的階躍響應(yīng)（由右到左為 100Hz~1kHz） ....................... 29 圖 離散系統(tǒng)數(shù)學(xué)模型 ................................................................................. 30 圖 500Hz 帶寬 179176。階躍響應(yīng) ............