说明：  卡尔曼滤波实验matlab程序。1用扩展卡尔曼滤波技术对上述系统的状态进行估计， 2.上机实现，给出目标位置与速度的真实轨迹和估计轨迹； 对滤波器的估计性能进行分析，
(Calman filter experiment matlab program.1. the extended Calman filter is used to estimate the state of the system, and the experimental procedure and program design are given; 2., the real trajectory and estimation trajectory of target position and velocity are given; The estimation performance of the filter is analyzed, and the position and velocity variance curves are given;)