Research On The Key Technologies Of High Fidelity Research Flight Simulator's Reconfigurability

High-fidelity research flight simulator (RFS) is essential tool for Aviation and flight simulation technology fields, which could be used to develop aviation technology and advanced simulation method. With the development of civil aviation and implementation of a large aircraft project in China, the needs of high-fidelity research platform for breakthrough of the flight simulator and aviation key technology are urgent. It can also provide a theoretical and technical support for the training flight simulator and engineering flight simulator to bridge the gap of the research and development of flight simulation technology with the advanced countries.RFS is complex and expensive tool which will face numbers of research tasks within its life cycle and each new task will make new demands which require RFS reconfigure quickly to rapidly meet the requirements. Reconfigurable is the most important quality and key technologies of the RFS, directly related to its scope of application. In this paper, theories and methods of RFS reconfigurable characteristics, model structure, real-time scheduling, simulator realization etc. were deeply studied to solve the key technical issues of model and cockpit reconfigurable for achieving the low-cost and high flexible RFS.Summarized and analyzed RFS basic issues such as the RFS requirements. Confirmed the key problems and the change characters of RFS. Proposed the structural model style and object-oriented style based architecture for the RFS with the quality attribute driven architecture design method and construct the framework with composite pattern. According to the characteristics of structure model style, it planned the level of RFS model, introduced the aircraft system as a mediator of the specific aircraft system physical model and used the facade pattern to treat the mediator interfaces uniformly, and used the publish/subscription method realized data sharing between systems to reducing the chain reaction and coupling between aircraft systems, divided the aircraft model into multiple independent domain models to ensure the domain expert who proposed experiment requirements could add and modify their domain code without caring about the details of the other systems. Analyzed the impact of adding non-real-time code to the real-time simulation model, decomposed the simulation code into unified planned real-time code, data code, communication code and studied the data security of multi-core multi-thread task decomposition. Improved the two level scheduling tactics with the multi-core processor which used a specific core as the sever of the real-time task, not only full use of multi-core processor to enhanced performance of the system but also allowed domain experts to add large numbers of non-real time code to the real-time model when they modify the domain models.Analyzed the main difficulties faced by the cockpit panels reconfiguration, proposed the CAN bus based one-to-one acquisition system and concept data model to divided the cockpit reconfigure into several panel unites reconfigure. The point to point acquisition system was presented, and combined acquisition box and combined acquisition management program were developed. General character of the acquisition box model organization and management was extracted using the hierarchical management of the acquisition system, hardware and software reuse of the acquisition box can be increased, the development work and maintenance difficulty of reconstructing a new panel unite was decreased effectively.Achieved the low cost RFS based on general PC, presented the software and hardware architecture, analyzed the characteristic of COTS technology, and improved COTS software integration strategy with hierarchical method, realized the real-time scheduling of simulation model with Windows operation system, discussed the reconfigure process and typical configuration. The heterogeneous distributed simulation platform is cost effective, and it can realize the high fidelity RFS simulation which has been a beneficial exploration for the high fidelity low cost RFS realization method and reconfigure process.