The conditions for the existence of periodical solutions, and the estimation of the perimeter and relative position of the limit cycles are obtained.
证明了周期解的存在条件，并估计了有关极限环的周长和相对位置。
Act as routine dispose signal estimation route to, recursion least square method possess in a position to at approximate time bring relative comparison small error.
作为常规的处理信号估计的方法，递归最小二乘法具有能够在估计的时候产生相对比较小的误差。
A filter design for rendezvous and docking with non-cooperative target was also given which can provide estimation information of relative position, velocity, attitude Angle and angular rate.
设计了针对空间非合作目标对接段的滤波器，能够提供对接段相对位置、速度、姿态角及角速率估计信息。
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