A clustered reconnaissance and defense system is designed,which can be used in military reconnaissance and civil disaster relief detection.The cubic unit is the core of the system hardware.The subsystems including fixed-wing UAV(unmanned aerial vehicle),four-rotor UAV and UAV are integrated in the cubic unit system.The working background is set,and the function and the working flow of the system are designed.A four-level communication network is designed to realize the information exchanges between UAV subsystems,collaborative communications between cubic unit systems,and information exchanges with remote command center.To realize the detection and defense tasks,a three-level command and control network is designed to implement intelligent collaborative management of tasks,data processing,and task execution control.The system can realize the function of detection and the function of regional communication relay,which can play an important role in both civil disaster relief and military war area detection and defense.

Based on previous missile trajectory optimization which optimized sectionally,design the pitch angle and the flight sequence of the tajectory integrally to make the missile lower and farther at the separation time of the 3rd stage engine.A dynamic model was built firstly.Then the optimization variables,the objective function and the restrictions were designed.The missile trajectory optimization was calculated and simulated with adaptive genetic algorithm.The simulation result shows that missile trajectory designed this way has lower altitude further range and better flight performance.