A Computer Aided Statistical Covariance Program for Missile System Analysis

Abstract : A combined Monte Carlo-direct covariance algorithm digital computer software package has been developed and tested for determining the effects of noise disturbances on large-scale missile systems. The combined software package was applied to a thirty-third order math model of a six degree-of- freedom air defense missile system. The large-scale system was composed of a fifteenth-order (15th) autopilot, a fourth-order (4th) actuator subsystem, a twelfth-order (12th) airframe, and a second-order (2nd) seeker. A basic statistical covariance program involving incremental variations about noise-free operating conditions was developed during the first year to calculate the effects of noise propagation for missile systems up to approximately 25th order.