An integrated software system for hybrid flight simulation: The boeing hybrid simulator

The Boeing Hybrid Simulator is a general-purpose hybrid computer designed to provide a laboratory for the development of hybrid methods of solving a variety of aero-space problems as well as to support large-scale simulations. The first such simulation is a Flight Simulation Program which provides both a three-degrees-of-freedom missile performance analysis tool and a six-degrees-of-freedom missile subsystem design analysis tool. The 3D simulation was implemented by placing the integrations of the translational equations on the analog, utilizing the digital for function generation, some algebraic manipulations, and basic bookkeeping. The 6D was implemented by placing the integrations of the rotational equations on the analog and the integrations of the translational equations on the digital. Phase control was supplied on the analog in both cases. A hybrid oriented execute-time monitor system supported the simulations by 1) providing a flexibile man-machine relationship, 2) providing an automatic and manual control capability, and 3) reducing digital and analog setup time. It enabled the man at the console to bring system packages into computer memory either to temporarily displace the simulations or to tie in with them in such a way that activities closely related to the execution of the simulations occur at the end of frame calculations.