Satellite-guided Bomb Guidance System Design And Precision Analysis

The JDAM (Joint Direct Attack Munitions) is a low-cost and high accuracy guidable bomb, owning to the laser guidable bomb have been found many of disadvantages in the war. It is very important realistic and martial signification that we must develop the homing satellite guidable bomb.The JDAM is based on simple bomb with the guidable device, which includes INS and GPS. And it is composed of payload, fuze, GCU (Guidance and manipulative unit) and rudder and so on. Compared with simple bomb, the satellite guidable bomb is a further range and higher accuracy guidable bomb.The intention of the paper is getting lower-cost, higher-accuracy and further-range of the bomb. Based on the requirement of a practical project, a guidance and control system of the satellite guidable bomb is analyzed and designed. The main content of the paper as follows:(1) Based on the requirement of a practical project, it is researched the guidance and control system in the theory and engineering application, and designed a guidance rule.(2)Established a bomb motion model, and based on hypothesis of small disturbance, the mathematical model is simplified and got the linear.(3)Designed pitch autopilot normalized with frequency-response method. Two autopilots are simulated and analyzed, and chose a better. Designed and simulated roll autopilot.(4)Designed pitch autopilot normalized with parameter space method, and compared with frequency-response method.(5)It is established a bomb guidance system mathematical model, and simulated in random.(6)Factors which affect the guidable accuracy are analyzed, and get a better accurate apportionment. It shows that the design of guidance and control system and the error apportionment are right.