Organizing aircraft navigation system as real time reference model architecture

Thinking that the future aircraft tends to be as a flying robot where a flight plan is the main goal to achieve. The aircraft navigation requires many operations to be performed by several and different aircraft equipment. In this paper, the navigation process has been organized as Intelligent reference model, it is functionally distributed through nodes of a multi levels hierarchy, the root node of the hierarchy determines the flight plane and sends the corresponding required flight states to the nodes in the next level which receive the required states and perform further processing producing corresponding sub goals to the next level and so on until the leave nodes represents the actuators and sensors. The sensing parameters are read at the leave nodes and sent after processing or directly to the higher levels as required. Separate real time communication networks are used in the hierarchy, each network connect one node in a level with the nodes in the next level which have functional relation to that node. Simulation of the hierarchical nodes is implemented using multi computers system to verify the function of each node and the required data messages between them. The real time constrains in the real time communication networks and the haul system are evaluated for worthy navigation system.