Miss Distance Analysis Via Finite-time Norm For Homing Missile

In recent years, several wars, as the representative of the precision guided weapons, missile has played a vital role, in order to improve the accuracy of the missile's guidance, the analysis of homing terminal guidance system miss distance is becoming increasingly important. Traditionally used for terminal guidance system miss distance analysis method mainly Monte Carlo method, analysis of covariance, linear adjoint method, these methods have less performance index and the analysis cycle is too long, can not meet the modern war on the requirements of precision guided weapon. Therefore necessary to find a method on comprehensive analysis of miss distance of terminal guidance system. Against problems above, this paper studies as follows:Firstly, this paper establishes the homing terminal guidance system model, the flight control system is closer to the actual physical system. By analyzing the homing terminal guidance system model, summarized the three characteristics of terminal guidance system:finite-time, linear time-varying and non-zero initial conditions.Secondly, against the characteristics of the system for terminal guidance, this paper establishes the models of seeker noise and target maneuver by the concept of forming filter, analyses the root mean square miss distance of TGS by finite-time generalized H2 method and modified Davison-Maki method, reveal the relationship in seeker noise, target maneuver and flight control system parameter, and proposes an optimization program of flight control system parameter.Thirdly, against the defects of finite-time generalized H2 method which can not take into account the various factors, this paper derives physical meaning of generalized H2 norm with multiple noise input, and proposes a comprehensive analysis method of miss distance of TGS, analyses miss distance quantitatively, and proposes an optimization program of flight control system parameter.Finally, this paper compares proposed method finite-time generalized H2 method and linear adjoint method, respectively analyses the advantages and disadvantages of each method, and verifies that proposed method is scientific and effective.