跟踪滤波的目的是根据已获得的目标观测数据对目标的状态进行精确估计，跟踪滤波的关键是对机动目标的跟踪能力，机动目标跟踪的主要困难在于跟踪设定的目标模型与实际的目标动力学模型的匹配问题。

-The purpose of tracking filter is based on objective observational data has been the target of the state accurately estimate the key to tracking filter for maneuvering target tracking capabilities, the main difficulty maneuvering target tracking is to track the target model to set realistic goals and motivation learn the model matching problem.