MODELLING AND ORDER REDUCTION OF GUIDED WEAPON CONTROL SYSTEM

Abstract

Weapons used for self defence such as surface to air missiles or anti-ballistic missiles, should have a very high single shot kill probability. Guided weapon systems use a close loop system to reduce the miss distance and improve the single shot kill probability. The objective here is to obtain a mathematical model of the Guided missile having six degrees of freedom in a three dimensional plane; and to reduce the order of the system. Modelling of the system is useful for the purpose of analysis, design and testing for the accuracy of the control system, since testing on the real systems are too expensive and limited by political and strategic reasons. The overall model obtained is reduced to 4`h and 3`d order using four different algorithms, and their performance is compared. Integral square error obtained for a step input to the original system and reduced order system is used as the merit index. Simulation of the missile trajectory with user configurable initial condition is also carried out on a three dimensional plane. Iv