Abstract
A flight simulator is indispensable for aircraft research and development. The system has the following 4 main pieces of equipment: (1) cockpit system, (2) visual system, (3) motion system and (4) real time computer system.
Recently as the simulation scale has been enlarging, it is requested to improve the function of simulator. In order to increase the capability, the most effective way is to improve the function of the computer system. One of the ways is to use a much higher speed computer or to introduce a multi-computer system. The other one is to decrease a system overhead time caused by the interrupt processing and the coupling method among computers.
At NAL a multi-computer system is adopted. For a multi-computer system, the most important point is how to couple the computers. In the paper we present a method to reduce the system overhead time by introducing a high speed, independent repeating transfer data bus. Furthermore, we present a method that is effective to decrease the transfer delay. At last we show the propriety of the method by applying it to our flight simulator multi-computer system (NFCS).
