Dual unscented filter for reentry target real-time tracking

作者：Liu Ye^*; Zhu Ju Bo; Liang Dian Nong

来源：Journal of National University of Defense Technology, 2011, 33(1): 81-86.

• Accuracy analysis
• Estimation methods
• Incomplete data
• Information lost
• Input vector
• Numerical examination
• Random input
• Re-entry vehicles
• Real time tracking
• Simultaneous estimation
• The dual filter
• Tracking performance
• Tracking problem
• Unscented filters

Proper dynamic models and estimation methods are crucial factors to achieve a nice tracking performance for a reentry target. First, the dynamic model of maneuver reentry vehicle was chosen for reentry target tracking, and the tracking problem was equivalent to the simultaneous estimation of the state and the parameter. Then, the relativity of the state and the parameter were discussed by numerical examination. Next, for the information lost caused by the assumption of a deterministic input vector in the original dual unscented filter, an improved dual unscented filter based on a random input vector was proposed, and a detail accuracy analysis was achieved in theory. Finally, the accuracy, applicability and ability for processing incomplete data were validated by simulations.

• 出版日期2011