Impacts of Deflection Nose on Ballistic Trajectory Control Law

Bo Zhang,Mengyu Cao,Shushan Wang,Yuxin Xu

doi:10.1155/2014/984840

Abstract

The deflection of projectile nose is aimed at changing the motion of the projectile in flight with the theory of motion control and changing the exterior ballistics so as to change its range and increase its accuracy. The law of external ballistics with the deflectable nose is considered as the basis of the design of a flight control system and an important part in the process of projectile development. Based on the existing rigid external ballistic model, this paper establishes an external ballistic calculation model for deflectable nose projectile and further establishes the solving programs accordingly. Different angle of attack, velocity, coefficients of lift, resistance, and moment under the deflection can be obtained in this paper based on the previous experiments and emulation researches. In the end, the author pointed out the laws on the impaction of external ballistic trajectory by the deflection of nose of the missile.

Highlights

Targets in the modern war are changing constantly
The external ballistics is a science of mechanics based on motion stability, vibration theory, and aerodynamics, relying on modern control theory and computer technology
Trajectory calculation program is designed based on the rigid-body ballistic trajectory modeling to conduct the stimulation calculation for the external trajectory of the deflectable nose projectile

Summary

Introduction

Targets in the modern war are changing constantly. The increasing targets with high mobility, extensive depth, and multiple levels put a higher demand on the renovation of the missile technology. The external ballistics is a science of mechanics based on motion stability, vibration theory, and aerodynamics, relying on modern control theory and computer technology. The external ballistics only studies the behavior of the projectile and provides the simple trajectory design and firing tables Some control methods such as data driven fault tolerant control [1,2,3,4,5], robust control [6,7,8,9], and so forth have been applied in this field. The external ballistics has been widely studied in the research fields like trajectory calculation, flight stability, initial disturbance analysis, dissemination, controllable trajectory, integral optimization design, and experiment technology and parameter identification [10,11,12,13]. Experts and professors put forward a number of new projects regarding this subject

Rigid-Body Dynamic Modeling for Deflectable Nose Projectile

Establishing Rigid-Body Dynamic Modeling

The Missile Body Centroid Dynamic Equation m dV dt

Simulation Calculations and Results Analysis

Conclusions