Guidance And Control Law Design And Mathematical Simulation For The Imitation Of GBU-38

The JDAM(Joint Direct Attack Munitions)is a new guidable bomb of America,It delegates the highest level and the newest direction in the field of bomb in the world.JDAM has many advantages such as the low cost,high accuracy and better destroyable effect.It has very martial signification that we research the bomb to improve military equipment.The bomb we researched in this article is the bomb named GBU38,which is the common type in the JDAM group.Firstly,this paper combs through the development and current conditions of JDAM bomb.Secondly,the data and the figures of GBU-38 are analyzed,and its aerodynamic shape is mapped.By using the maturing aerodynamics computing software,the aerodynamic shape' simulation model of GBU-38 imitation is established,and all of the aerodynamic data are obtained through numerical computation.Thirdly,force equations,moment equations,mechanics equations and kinematics equations are deduced,and six degree kinematics equations are established.Finally,on the basis of the bomb' features,we give a solution by trajectory design and guided and control law design for solving the problems,such as the low overload and the high effect of rudder.Through the simulation we checked the feasibility of design.And the simulation results give references to engineering application.