Research On The Model And Calculation Methods For The Stable Scanning Of A Terminal-sensitive Projectile Without Parachute

Stable scanning technology is one of the key technologies in the development process of the system of terminal-sensitive projectiles, which can affect the ability to strike targets accurately. Based on the existing stable scanning theory, this thesis uses two wings without parachute to achieve the required conditions.Terminal-sensitive projectile without parachute is an improved design project, focusing on the fact that the umbrella has a long retention time and is affected largely by wind.The main work of this thesis is:first of all, the rigid body trajectory model while terminal-sensitive projectile is throw out is established, with initial parameters for trajectory calculation where two wings open; secondly, the analysis of the stress state of terminal-sensitive projectile with two wings open is carried out, and Euler angle method is used to establish the system trajectory model with its rotation axis being the vertical axis, and the system trajectory model with its rotation axis has an angle from the vertical axis respectively, and comparing the simulation results.Since the big attitude motion in the process of terminal-sensitive projectile flight and the pitch angle may reach 90°,the quaternion method is used to change the equations and is compared with the Euler method.The simulation results show that the trajectory model with its rotation axis has an angle from the vertical axis is better than the trajectory model with its rotation axis being the vertical axis;the quaternion method is better than the Euler angle method to describe the terminal-sensitive projectile trajectory with large attitude, for the quaternion method can solve the equation degradation problem caused by the Euler angle method to describe the terminal-sensitive projectile rotating movement.