Math Model for NADC Spin Simulator and F-14 High Angle of Attack Data Base. Volume I.

Nonlinear equations of aircraft motion, a digital representation of aircraft control systems, and a high angle of attack data base for the F-14 airplane are presented. The equations of motion are designed to be suitable for modeling extreme high angle of attack flight and even fully developed spins. These equations accommodate linear or nonlinear data which are functions of up to three variables, large angle orientations, mass-engine-store assymetries, and oscillatory and rotoary balance data. The control system development uses the Tustin transformation to calculate the state space matrix representation of linear networks directly from the transfer functions of each element. Nonlinear elements such as gain scheduling, switching, and nonlinear algebraic functions are also considered. Current F-14 Control Systems of interest are diagrammed in a manner amenable to the programming of this method. Author