Analysis of PN Guided Missile Systems in the Time Domain
It is well known that investigation of processes and phenomena is linked, first of all, with the construction of mathematical models describing these processes and phenomena using mathematical language. The model is characterized by some parameters. These parameters include input variables or control actions, as they are called, or simply controls, output variables or output coordinates, or controlled variables and also intermediate variables, the so-called state variables. The time domain analysis is usually based on the so-called step input. Although PN guidance presents a nonlinear control problem, to apply known technique of analysis and design, the system equations are linearized, yielding a linear time-varying system. The miss distance in the guidance system analysis and design is, at a certain degree, analogous to the error in conventional control systems. The goal of guidance is to reduce the miss distance to the smallest feasible amount. Target maneuver plays a major role in determining missile system performance.