基于电流变液的大射电望远镜馈源支撑系统风振阻尼控制

WIND-INDUCED VIBRATION CONTROL OF FEED SUPPORTING SYSTEM FOR LARGE RADIO TELESCOPE USING ELECTRORHEOLOGICAL DAMPER

针对新一代大射电望远镜机电光一体化创新设计悬索馈源支撑系统的随机风振响应问题，设计了一种电流变可调阻尼器来实现大射电望远镜悬索馈源支撑系统风振的附加阻尼控制，彻底解决了对于柔性悬索结构振动的附加阻尼控制难题。推导了电流变可调阻尼器的力学模型，并提出了相应控制策略。通过计算机仿真，验证了所设计的可调阻尼器的有效性，可使馈源支撑系统的风振降低５０％左右，可有效地提高馈源轨迹跟踪的精度。

Considering wind-induced vibration of the feed supporting system with cables for the Optomechatronics design project of next generation large spherical radio telescope, a novel ER damper is designed to realize the additional damping control of this vibration. The model of wind is first developed to implement this design and simulations. The damping force model of the designed ER adaptive damper is developed in detail, and the strategy of the additional damping control is proposed. The numerical simulation results have verified the validity of the designed adaptive ER damper to suppress the wind vibration of the feed supporting system, and the maximum suppression of the wind-vibration can be reached 50% of the original amplitude without ER damper. The favorable windinduced vibration suppression results have laid a solid foundation for the engineering implementation of high precision trajectory tracking for the next generation large radio telescope.