In order to achieve high-precision trajectory tracking of hypersonic vehicles， a trajectory tracking algorithm for highly maneuverable targets combining moving horizon estimation and an interactive multi-model （IMM） algorithm was proposed. Firstly， the motion model and measurement model of the glide segment of the hypersonic vehicle under the half-velocity system were given. Then， the moving horizon estimation method was used to transform the state estimation problem into a constrained optimization problem， and the physical constraints of the glide segment of the flight vehicle were fully considered. On this basis， in order to cope with the different maneuver modes of the target， a model set was established to approximate it with the help of the IMM algorithm. Finally， the algorithm was verified under unchanged and mutated maneuver modes. The results show that the new algorithm adopts parallel estimation of multiple models， and the model probability is adjusted in real time for fusion output， which can effectively avoid the mismatch of the target tracking model and significantly improve the trajectory tracking accuracy of highly maneuverable targets such as hypersonic vehicles.

With the rapid development of information equipment， the combat style is also changing and improving， and the cross domain distributed operation through air ground coordination will become inevitable. The air combat platform has the advantages of good mobility， broad vision and strong situational awareness， while the ground defense equipment has the advantages of concealed deployment， wide firepower coverage and strong anti-interference ability. Adopting the distributed coordination mode of air and ground can give full play to their respective advantages， improve the utilization rate of equipment of all services and arms， and achieve greater operational efficiency. In the future， air ground cooperative operations will be characterized by “three-dimensional unity， air to ground coordination， and multiple divisions in one region”。The necessity of cross domain distributed operation through air ground coordination is put forward in this paper for future battlefield characteristics. The characteristics of cross domain distributed defense are given. The shortcomings of the current defense operation architecture are analyzed， and the specific measures of air ground cooperative cross domain distributed defense are analyzed. The key technologies of cross domain distributed defense are summarized and the development suggestions are given.