基于加权信息熵的航天器姿态稳定自动监测  

Automatic Monitoring of Spacecraft Attitude Stability Based on Weighted Information Entropy

作　　者：张宽[1] 韩威华[1] 

机构地区：[1]北京航天飞行控制中心,北京100094

出　　处：《载人航天》2016年第5期608-612,630,共6页Manned Spaceflight

基　　金：国家自然科学基金(11403001)

摘　　要：为监视航天器的姿态控制稳定度以为后续飞行控制决策提供依据,提出了一种基于加权信息熵的航天器姿态稳定监测方法,该方法使用加权信息熵计算航天器姿态局部时域内的非线性变化复杂度,进而量化评估航天器的姿态稳定性,可对航天器的姿态稳定进行自动辅助监视和判断。探月三期再入返回飞行试验任务期间的17次调姿数据验证了方法的有效性,并且发现了某次调姿后俯仰角和偏航角均未收敛和稳定,此现象在任务期间并未被测控人员监视发现,进一步证明亟需开展航天器姿态稳定自动辅助监视和判断的必要性。To monitor the attitude stability of the spacecraft and provide useful evidence for the flight control decision-making, a weighted entropy based approach for monitoring the spacecraft attitude stability was proposed. The entropy was used as the measure of the local time - domain complexity in the approach. The data of 17 attitude controls from the reentry flight mission for the 3rd phase of Chinese lunar exploration program were employed to test our approach. The experiment results proved the validity of the approach, the phenomenon that the pitch and yaw did not converge and still changed after the attitude adjustments was found, which was not monitored during the mission and further proved the importance and urgency of automatic monitoring and judgement for the space-craft attitude stability.

关 键 词：姿态稳定 加权信息熵 自动监视与判断 

分 类 号：TP319[自动化与计算机技术—计算机软件与理论]