Design And Research On Simple Guided-bomb's Controllable Ballistic Trajectory

In this dissertation, design and research on simple guide bomb's controllable ballistic trajectory with high initial altitude or big initial orientation angle is deeply developed on the background of project of changing our conventional bomb into guided bomb by using integrated design technology of pneumatics, ballistic, flying property, control and simulation. The brief research points are as follows:Firstly, the mathematical six freedom model of simple guided bomb's extended range motion is established based on its pneumatic characteristics and its motive properties under high initial altitude or big initial orientation angle casting conditions.Following, the mathematical model of simple guided bomb's project ballistic trajectory is established according to its guide mode and its attack form and the project ballistic trajectory's calculation flow is provided, too. All kinds of factors that affect simple guided bomb's fall point precision are offered and analyzed. The casting attack region is defined. Within this region, the project ballistic trajectories which meet with the tactics and technology guide line are designed optimally.Subsequently, the non-linear differential equation of simple guided bomb is transformed into linear equation with small disturbance theory and the disturbance motion equations are established. At the same time, dynamical coefficients are defined and simple guided bomb' s disturbance properties are analyzed as well as its dynamic ones under the rudder's step response.Next, a method of direct self-turning neural network control based on simple guided bomb's body transfer function which is related to project ballistic trajectory is presented. The reason is that simple guided bomb's dynamic parameters are taking on slowly time-varying property when the bomb is cast with high initial altitude or big initial orientation angle.And next again, the cases of coupling between simple guided bomb's three channels are analyzed when it is cast with high initial altitude or big initial orientation angle. And an order-reduced dynamic decoupling method is introduced on the basis of invariability coupling theory which...