發(fā)布時(shí)間：2018-03-25 22:34

  本文選題：射電望遠(yuǎn)鏡　切入點(diǎn)：主動(dòng)反射面　出處：《光學(xué)精密工程》2016年07期

【摘要】：針對(duì)新疆奇臺(tái)110m射電望遠(yuǎn)鏡主動(dòng)反射面控制技術(shù)的要求,設(shè)計(jì)和研制了一種新型的位移促動(dòng)器和位移控制系統(tǒng),并采用雙頻激光干涉儀對(duì)多個(gè)位移促動(dòng)器及其控制系統(tǒng)進(jìn)行了全面檢測(cè)。位移促動(dòng)器采用了基于渦輪蝸桿加滾珠絲桿的高精度結(jié)構(gòu)設(shè)計(jì)方案,控制器系統(tǒng)采用了ARM微處理器。最后選擇S曲線加速控制方法,設(shè)計(jì)了主動(dòng)反射面控制系統(tǒng)硬件平臺(tái)和軟件算法。基于雙頻激光干涉儀和光學(xué)隔振平臺(tái)在恒溫超潔凈條件下進(jìn)行了系列測(cè)試。結(jié)果表明:系統(tǒng)實(shí)現(xiàn)了行程范圍為30mm,控制精度為5μm RMS的快速精密控制;在額定負(fù)載300kg,步長(zhǎng)2mm,行程30mm范圍內(nèi),實(shí)測(cè)結(jié)果平均值與理論值偏差為0.04%,標(biāo)準(zhǔn)偏差為3.67μm。最后,采用測(cè)量精度為0.25μm的激光傳感器對(duì)4塊四點(diǎn)支撐的四邊形子面板進(jìn)行了驗(yàn)證檢測(cè)。結(jié)果顯示:經(jīng)多次迭代后主動(dòng)反射面控制閉環(huán)系統(tǒng)的控制精度小于5μm RMS,遠(yuǎn)遠(yuǎn)優(yōu)于3mm波段射電望遠(yuǎn)鏡主動(dòng)反射面控制的技術(shù)要求。
[Abstract]:A new displacement actuator and displacement control system is designed and developed to meet the requirements of the active reflector control technology of Xinjiang Qitai 110m radio telescope. The dual frequency laser interferometer is used to detect several displacement actuators and their control systems. The displacement actuators adopt a high precision structure design scheme based on turbine worm and ball wire rod. The ARM microprocessor is used in the controller system. Finally, the S-curve acceleration control method is selected. The hardware platform and software algorithm of active reflector control system are designed. Based on dual-frequency laser interferometer and optical vibration isolation platform, a series of tests are carried out under the condition of constant temperature and ultra-clean. The results show that the travel range of the system is as follows:. 30mm fast precision control with control precision of 5 渭 m RMS; In the range of 300kg rated load, 2mm step and 30mm range, the deviation between the measured results and the theoretical value is 0.04 and the standard deviation is 3.67 渭 m. Four quadrilateral quadrilateral panels supported by four points are verified and detected by using a laser sensor with measuring precision of 0.25 渭 m. The results show that the control accuracy of the active reflector control closed-loop system is less than 5 渭 m RMS after several iterations, which is far superior. Technical requirements for active Reflector Control of Radio Telescope in 3mm Band.
【作者單位】： 中國(guó)科學(xué)院國(guó)家天文臺(tái)南京天文光學(xué)技術(shù)研究所;中國(guó)科學(xué)院南京天文光學(xué)技術(shù)研究所天文光學(xué)技術(shù)重點(diǎn)實(shí)驗(yàn)室;中國(guó)科學(xué)院大學(xué);
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(No.U1331204) 國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(No.2015CB857100)
【分類號(hào)】：TH751
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本文編號(hào)：1665154