Research On Resources Scheduling And Trajectory Planning Method For Multiple Combat Aircrafts To Detect Stealth Target

The emergence of the stealth aircraft has changed the pattern of modern war,and it has a very lower radar cross section(RCS)that is an area of electromagnetic scattering for target.It is an serious challenge for the radar equipment which has equipped our troops.Therefore,it is difficult to win the modern war relied on a single weapon platform in the traditional way.We must find out an efficient way to fight with the stealth aircraft.Because of the body structure and the limitation of stealth materials technology,the stealth aircraft does not own a good penetration all orientations.Multiple Combat Aircrafts can form a more flexible radar network to be against the stealth target.In order to improve the ability of target searching and the kill probability,Multiple Combat Aircrafts should cooperatively combat to be against the stealth aircraft.Based on the background of Multiple Combat Aircrafts formed a more flexible radar network,the paper is aimed at improving the ability of searching for the stealth target and attacking efficiency.This dissertation aims at two points,which is resources scheduling and trajectory planning.And the main outcomes and works of this dissertation are listed as follows:(1)The characteristics of cooperative detection problem are discussed,and we propose the pattern of cooperative detecting,at the same time we research and establish a cooperative detection index function.Aiming at the problem that the low RCS features of the stealth target can compress radar detection range,and the radar target tracking performance and radar tracking target loss conditions are research and analyzed,and the cooperative detection mode of multi-aircrafts which is cooperative detecting the stealth target is proposed,and it includes the cooperative search mode,the cooperative detection mode,the cooperative detection mode of formation platform and the mode of collaborative jamming.In order to judge the performance of the detection performance effectively,a cooperative detection index function is established.(2)The problem of multi-combat-aircrafts detecting resource scheduling is studied,and an anti-stealth detection resource scheduling model is established.Based on this model,we designed an extend-CSP basic strategy,at the same time,the estimation method about Q-value is proposed based on Monte Carlo sampling.Because of uncertain state of target,multiple sensor resources scheduling problems are always included the uncertain,Based on partially observable Markov decision process(POMDP),we established collaborative anti-stealth detection mission planning and resources scheduling model.In order to reduce the time complexity of the computation,the basic strategy is proposed.In this paper,a method is proposed to approximate the target detection and tracking stealth target.(3)The problem of multi-combat-aircrafts optimal detection trajectory planning is researched.Based on the idea of the rolling optimization,the online solving strategy is proposed.Based on the idea of rolling optimization,we adopt the way of online dynamic optimizing to planning the trajectory which is the optimal detection trajectory.The basic principle of hp-adaptive pseudospectral method is deeply analyzed,and the problem of hp-adaptive pseudospectral algorithm based on RH is proposed.The method is proposed to solve the problem of trajectory planning.Especially,in view of the processing time constraints,we introduced a distributed time coordination strategy based on coordinate variables.