中文摘要：

针对实际工程中出现的不完全量测下火控系统性能的理论研究，将水面舰船建模为椭圆形面目标，建立了不完全量测下基于面目标测量的数学模型，给出了火控跟踪系统统计意义下的估计误差Cramer-Rao下界（CRLB）；根据目标状态与射击诸元间的非线性误差传递关系，基于UT变换得到不完全量测下基于面目标的火控系统射击诸元误差方差下界。以某型舰载火控系统为例，仿真结果表明，在不完全量测下，与传统的质点目标火控系统相比，基于面目标测量的火控系统在估计性能上提高36%，火控性能提高34%。

英文摘要：

In order to study the performance of the fire-control system based on intermittentobservations in practical engineering,a ship is modeled as an elliptical area target,the area targetmeasurement model with intermittent observations is established,and the estimation error variancecharacteristic Cramer-Rao Lower Bound(CRLB)of the tracking system is proposed;according to thenonlinear error propagation between the target state and the shoot element,the shoot element errorvariance CRLB with intermittent area target measurements is obtained by UT transformation.Thesimulation is provided on the basis of a certain type ship fire-control system,the results illustrate that,with intermittent observations,the estimation performance of the area target tracking system increasesby36%as compared to the traditional point target tracking system,and the performance of the firecontrolsystem increases by34%.