超静敏捷卫星隔振与控制的动力学耦合及协同设计方法

高性能的卫星平台需要同时具备敏捷与超静性能,为此一方面要采用大力矩执行机构与高带宽控制,另一方面要采取良好的振动隔离措施,而这两者之间会形成一定的动力学耦合,影响控制性能的最终实现.研究了对含高速转子的执行机构进行隔振引入的陀螺进动问题及其对敏捷控制性能的影响,分析了有效载荷隔振导致的异位控制问题及其对控制稳定性的影响.研究了隔振与控制参数的协同设计方法,提出了基于进动衰减时间的执行机构隔振参数选取原则,以及阻尼常数隔离的有效载荷隔振参数选取原则.基于该设计思路可以实现卫星隔振与控制参数的合理匹配,同时达到较好的超静与敏捷性能.

Dynamics Coupling and Integrated Design in Vibration Isolation and Attitude Control Design of Ultra Quiet Agile Satellites

High precision payloads require both ultra quiet and agility performances of satellite platform, which brings several design challenges. The gyroscopic precession induced by actuator isolation and its impact on the agility performance are investigated, and a parameter selection principle is proposed based on the estimation of the precession decay time. The non collocated control problem caused by payload isolation is studied and a design principle is proposed based on damping constant isolation. Simulations show that both ultra quiet and agility performances can be ensured by using the proposed design method.