FAST饋源支撐系統(tǒng)的終端精度保證研究
發(fā)布時(shí)間：2018-03-05 22:17
本文選題：剛?cè)狁詈?/strong> 切入點(diǎn)：抑振控制 出處：《機(jī)械工程學(xué)報(bào)》2017年17期 論文類型：期刊論文
【摘要】：我國自主設(shè)計(jì)和建造的500 m口徑大型射電望遠(yuǎn)鏡(Five-hundred-meter aperture spherical radio telescope,FAST)已經(jīng)順利完成主體工程,后續(xù)將轉(zhuǎn)入控制調(diào)試和試運(yùn)行階段。創(chuàng)新的光機(jī)電一體化的饋源支撐系統(tǒng)有效減輕了系統(tǒng)重量和造價(jià),但是大跨度索并聯(lián)機(jī)構(gòu)的使用導(dǎo)致了風(fēng)擾振動問題。FAST饋源支撐系統(tǒng)的終端軌跡精度是實(shí)現(xiàn)其觀測能力的關(guān)鍵,因此迫切需要展開抑振控制研究,以保證系統(tǒng)穩(wěn)定性和終端精度,支撐后續(xù)天文觀測功能的實(shí)現(xiàn)。針對該問題,建立軌跡補(bǔ)償和內(nèi)力抑振控制邏輯,并利用饋源支撐系統(tǒng)縮尺模型完成了軌跡補(bǔ)償抑振控制的試驗(yàn)研究。建立FAST饋源支撐系統(tǒng)的整體動力學(xué)仿真模型,開展了內(nèi)力抑振控制的仿真研究。對上述兩種抑振控制方法的特點(diǎn)和適用性展開了討論。抑振控制方法及對比討論研究為FAST項(xiàng)目的工程實(shí)踐提供了理論指導(dǎo)和試驗(yàn)支撐,并可拓展應(yīng)用于其他柔性支撐機(jī)構(gòu)的控制研究。
[Abstract]:The five-hundred-meter aperture spherical radio telescope FAST, which has been designed and built independently in China, has successfully completed the main project. The following will turn to the phase of control debugging and trial operation. The innovative optical-electromechanical integrated feed support system effectively reduces the weight and cost of the system. However, the use of large-span cable parallel mechanism leads to the wind disturbance vibration problem. The terminal trajectory accuracy of fast feed support system is the key to realize its observation ability. Therefore, the research on vibration suppression control is urgently needed to ensure the stability of the system and the terminal accuracy. In order to solve the problem, the logic of trajectory compensation and internal force vibration suppression control are established. The experimental study of trajectory compensation and vibration suppression control is completed by using the scale model of feed support system. The overall dynamic simulation model of FAST feed support system is established. The characteristics and applicability of the two vibration suppression methods mentioned above are discussed. The comparative study provides theoretical guidance and experimental support for the engineering practice of the FAST project. And can be extended to other flexible support mechanism control research.
【作者單位】： 電子科技大學(xué)機(jī)械電子工程學(xué)院;清華大學(xué)摩擦學(xué)國家重點(diǎn)實(shí)驗(yàn)室;清華大學(xué)精密/超精密制造裝備及控制北京市重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金(51575292,51475252) 國家科技支撐計(jì)劃(2015BAF19B00) 國家留學(xué)基金(201606215004)資助項(xiàng)目
【分類號】：TH751
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