FAST馈源支撑系统的终端精度保证研究

发布时间：2018-03-05 22:17

本文选题：刚柔耦合　切入点：抑振控制　出处：《机械工程学报》2017年17期 　论文类型：期刊论文

【摘要】：我国自主设计和建造的500 m口径大型射电望远镜(Five-hundred-meter aperture spherical radio telescope,FAST)已经顺利完成主体工程,后续将转入控制调试和试运行阶段。创新的光机电一体化的馈源支撑系统有效减轻了系统重量和造价,但是大跨度索并联机构的使用导致了风扰振动问题。FAST馈源支撑系统的终端轨迹精度是实现其观测能力的关键,因此迫切需要展开抑振控制研究,以保证系统稳定性和终端精度,支撑后续天文观测功能的实现。针对该问题,建立轨迹补偿和内力抑振控制逻辑,并利用馈源支撑系统缩尺模型完成了轨迹补偿抑振控制的试验研究。建立FAST馈源支撑系统的整体动力学仿真模型,开展了内力抑振控制的仿真研究。对上述两种抑振控制方法的特点和适用性展开了讨论。抑振控制方法及对比讨论研究为FAST项目的工程实践提供了理论指导和试验支撑,并可拓展应用于其他柔性支撑机构的控制研究。
[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.
【作者单位】：电子科技大学机械电子工程学院;清华大学摩擦学国家重点实验室;清华大学精密/超精密制造装备及控制北京市重点实验室;
【基金】：国家自然科学基金(51575292,51475252) 国家科技支撑计划(2015BAF19B00) 国家留学基金(201606215004)资助项目
【分类号】：TH751

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