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Development and Operations Of Flight Systems for Responsive Missions

Vehicle flight operations (and more particularly, the operation of a vehicle’s flight through its onboard software) must be built from the “ground up” to support responsive, safe flight at a significantly lower cost than that experienced with today’s space flight vehicles. To accomplish this, we must deviate from the current flight system paradigm. We must design and develop systems from the beginning considering the entire life cycle (how to fly it, flight software maintenance and upgrades, etc.) This includes developing flight test prototypes and test articles early in the system life cycle to gain “real” experience and determine the “real” requirements such that the ultimate design leads to the “correct” development product. Flight operations (and more specifically, the flight systems and guidance navigation and control (GN&C) operations) can be developed early in the program to support rapid test articles, rapid mission planning and rapid flight software development, without an army of people doing each function. This development “system” can then also support the operations of the flight systems with flight software maintenance and turn-around and pre, during and post flight analysis. One tool that supports this design philosophy has already been partially developed under NASA’s NRA 8-30 Space Launch Initiative (SLI) program. It is called the Integrated Development and Operations System (IDOS). IDOS is an integrating environment designed to support the flight software life cycle needs of reusable launch vehicles (per SLI goals) and by extension other aerospace vehicles. This integrated environment provides for design, development, implementation, test, validation, operation (mission planning and execution) and maintenance of advanced GN&C algorithms in a Copyright © 2004 by Universal Space Lines LLC. Published by AIAA 2 Responsive Space Conference, with permission. flight operations environment. Using IDOS, we have demonstrated an order of magnitude reduction in the required effort to transform an advanced GN&C “idea” (algorithm) into working flight software operating on a flight like processor in real time.