【摘要】：凝視型紅外面陣探測器已進(jìn)入可實(shí)際應(yīng)用階段,在面陣規(guī)模一定的情況下,需指向鏡配合探測器快速、高精度指向探測區(qū)域以在不降低空間分辨率的前提下擴(kuò)大探測視場。指向機(jī)構(gòu)驅(qū)動(dòng)控制系統(tǒng)的定位精度和控制穩(wěn)定度、角度位置傳感器的測量精度及穩(wěn)定度直接影響遙感相機(jī)的成像質(zhì)量。目前廣泛應(yīng)用的掃描機(jī)構(gòu)驅(qū)動(dòng)控制方式,采用伺服電機(jī)與絕對式感應(yīng)同步器構(gòu)成三環(huán)反饋控制系統(tǒng),保證了運(yùn)動(dòng)控制的線性度和控制精度。步進(jìn)電機(jī)作為應(yīng)用技術(shù)成熟的驅(qū)動(dòng)執(zhí)行器已經(jīng)在線列探測器掃描機(jī)構(gòu)的步進(jìn)掃描模式中取得成功應(yīng)用,其脈沖控制步距遞進(jìn)的運(yùn)行方式在凝視指向,特別是步進(jìn)凝視模式下具有應(yīng)用價(jià)值。本文針對凝視指向模式下對驅(qū)動(dòng)響應(yīng)速度、定位控制精度和角度測量精度的高要求特點(diǎn)提出采用步進(jìn)電機(jī)開環(huán)控制方式配合絕對式感應(yīng)同步器實(shí)現(xiàn)指向驅(qū)動(dòng)控制的方案,并設(shè)計(jì)步進(jìn)指向測試系統(tǒng),該系統(tǒng)有效驅(qū)動(dòng)轉(zhuǎn)動(dòng)慣量20.3kg?m的負(fù)載實(shí)現(xiàn)20°范圍內(nèi)快速、穩(wěn)定指向。絕對式感應(yīng)同步器在真空環(huán)境下高可靠性、穩(wěn)定性的優(yōu)點(diǎn)在航天遙感領(lǐng)域得到認(rèn)可,為空間探測提供了絕對角度基準(zhǔn)。本文在分析絕對式感應(yīng)同步器測角系統(tǒng)在小范圍回轉(zhuǎn)軸角度測量應(yīng)用的基礎(chǔ)上,提出測角系統(tǒng)基于追蹤型軸角轉(zhuǎn)換器的非理想特性輸入誤差模型,并研究誤差檢測及補(bǔ)償方法。文章具體包括以下研究內(nèi)容:1.設(shè)計(jì)步進(jìn)指向測試系統(tǒng),系統(tǒng)實(shí)現(xiàn)步進(jìn)開環(huán)控制條件下小于3s,約20°角度范圍的快速指向并穩(wěn)定,穩(wěn)定時(shí)間小于0.3s,0.2s積分時(shí)間內(nèi)穩(wěn)定度優(yōu)于0.2″。2.完成基于追蹤型軸角轉(zhuǎn)換器的絕對式感應(yīng)同步器信息處理系統(tǒng)設(shè)計(jì),分析系統(tǒng)的運(yùn)行特性,測角系統(tǒng)實(shí)現(xiàn)測角穩(wěn)定度優(yōu)于0.5″(3?)、測角精度優(yōu)于2.5″(3?);3.在理論分析感應(yīng)同步器測角系統(tǒng)誤差的基礎(chǔ)上,提出其在小范圍回轉(zhuǎn)軸角度測量應(yīng)用方面的主要誤差來源為RDC的非理想特性輸入誤差,建立誤差模型并分析誤差成分;4.搭建測角系統(tǒng)誤差檢測平臺,分析實(shí)測誤差特性并研究硬件和軟件補(bǔ)償方法,補(bǔ)償后誤差值優(yōu)于2.5″(3?)。
[Abstract]:The stereoscopic infrared array detector has entered the practical application stage. Under the condition of a certain size of the array, the pointing mirror should cooperate with the detector quickly and point to the detection area with high precision in order to expand the detection field of view without reducing the spatial resolution. The positioning accuracy and control stability of the driving control system of the pointing mechanism, and the measurement accuracy and stability of the angle position sensor directly affect the imaging quality of the remote sensing camera. At present, the widely used scanning mechanism drive control mode adopts servo motor and absolute induction synchronizer to form a three-loop feedback control system, which ensures the linearity and control accuracy of motion control. Stepping motor, as a driving actuator with mature application technology, has been successfully applied in the step scanning mode of line detector scanning mechanism, and its pulse control step progressive operation mode is staring and pointing. Especially in the step gaze mode, it has application value. In this paper, according to the high requirements of driving response speed, positioning control accuracy and angle measurement accuracy in staring pointing mode, a scheme of using step motor open loop control mode combined with absolute induction synchronizer to realize directional drive control is proposed. The step direction test system is designed, which effectively drives the load of moment of inertia 20.3kg?m to realize fast and stable pointing in the range of 20 擄. Absolute induction synchronizer has been recognized in the field of space remote sensing for its high reliability and stability in vacuum environment, which provides an absolute angle reference for space detection. Based on the analysis of the application of absolute induction synchronizer angle measurement system in small range rotation axis angle measurement, this paper puts forward the input error model of angle measurement system based on tracking shaft angle converter, and studies the error detection and compensation method. The article includes the following research contents: 1. The step direction test system is designed. The system realizes the fast direction and stability of the angle range of about 20 擄under the condition of step open loop control, the stability time is less than 0.3 s, and the stability of 0.2 s integral time is better than 0.2 ". 2. The information processing system of absolute induction synchronizer based on tracking shaft angle converter is designed, and the running characteristics of the system are analyzed. the angle measurement stability of the angle measurement system is better than 0.5 "(3?), and the angle measurement accuracy is better than 2.5" (3?). 3. Based on the theoretical analysis of the angle measurement system error of induction synchronizer, it is proposed that the main error source in the application of small range rotation axis angle measurement is the input error of non-ideal characteristic of RDC, and the error model is established and the error components are analyzed. The error detection platform of angle measurement system is built, the measured error characteristics are analyzed, and the hardware and software compensation methods are studied. the error value after compensation is better than 2.5 "(3?).
【學(xué)位授予單位】：中國科學(xué)院研究生院(上海技術(shù)物理研究所)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：V443.5

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 譚建成;用感應(yīng)分壓箱法測定感應(yīng)同步器精度的誤差分析[J];控制微電機(jī);1978年03期

2 胡仲明;感應(yīng)同步器現(xiàn)場接尺[J];機(jī)床;1983年07期

3 本刊通訊員;;直線感應(yīng)同步器七位數(shù)顯表和圓感應(yīng)同步器數(shù)顯表鑒定會(huì)[J];機(jī)床與液壓;1983年02期

4 薛以達(dá);;新結(jié)構(gòu)感應(yīng)同步器及技術(shù)發(fā)展動(dòng)向[J];微特電機(jī);1985年02期

5 陳正]，

本文編號：2485206