非合作目标软捕获后的动力学参数无激励辨识

针对非合作目标动力学参数的在轨辨识问题,提出一种基于软对接机构状态感知的无激励辨识方法。当非合作目标被捕获后,复合体进入冲量缓冲和卸载阶段,软对接机构则处于无激励运动响应状态。首先,分析搭载软对接机构的主航天器运动学,建立包含非合作目标动力学参数的复合体动量方程,进而完成复合体绝对动量增量方程的构建。其次,针对求解动力学参数时存在的奇异问题,设计一种矩阵连续增维的方法实现避奇异求解,并通过矩阵条件数求解完成终止条件度量。最后,仅需在轨感知搭载软对接机构主航天器的广义坐标和广义速度,即可实现非合作目标动力学参数的辨识。数值仿真实验表明,提出的非合作目标动力学参数在轨无激励辨识方法具有求解速度快、辨识周期短、对基座姿态影响小和辨识精度高的优点。

Passive Matrix Organic Electroluminescent Display for 3G Cellular Phone

The major features of the display technologies for 3G cellular phone are reviewed. The comparison between their potential candidates for 3G cellular phone is given, and a detailed discussion is made on passive matrix organic electroluminescent display technology. A novel method to improve display contrast ratio is presented. Finally several 3G phone set prototypes with OLED display panels are given as well as the market forecast.