微型雷达柔性多体传动系统运动问题分析

Dynamic analysis of flexible multi-bodies in satellite radar

轴系装置由于不仅具有惯性而且具有弹性,因此在周期性荷载作用下,会产生扭转振动,甚至于产生拍振.本文针对卫星微型雷达,建立多柔性体系统动力学仿真模型,研究多柔性体上的弹性振动对雷达捕捉目标精度的影响.研究表明,两个转动机构都出现了拍振现象;对雷达镜面的影响表现为明显的在x,y方向上的谐波干涉,并提出改进方案.

Under the periodical loads, the shaft must have the torsional vibration, named ＂beat＂, because the shafting has not only inertia but also elasticity. In the paper, the system of the flexible bodies in the mini-type satellite radar is simulated to study the influence of the torsional vibration on the dynamic precision of the radar. The analyses show there are the ＂beats＂ （ a kind of vibration） on the rotation gears, and the influence of elastic vibration on the radar mirror shown harmonic interference in the x and y direction. At the basis, the amendment programs are moved.