Design And Implementation Of A Dual-redundancy Flight Control Computer Digital Model Based On Simics

Flight control computer plays a decisive role in reliability and safety of aircraft.It is mainly responsible for the aircraft sensor data processing,flight attitude control and redundancy management.But the real flight control computer is expensive and difficult to obtain,and can't be debugged and modified at any time.It's undoubtedly brings great inconvenience to the development and testing of flight control related software.As to these problems,this thesis proposed to establish a digitalized modeling of the dual-redundancy flight control computer on a real aircraft,thus to make the development and verification of the flight control computer could be independent of the time and hardware constraints in a real environment.In this thesis,the Simics modeling platform of Wind River Company is used to complete the digital modeling of the dual-redundancy flight control computer,so as to speed up the design efficiency of the flight control system and minimize it design cost.The digital modeling can also complete the data testing of the flight control computer and the intermodulation with the peripheral software even in the absence of real hardware.The digital model can also load the relevant drivers,operating systems and flight control applications while meeting all the real-world hardware functionality and real-time requirements.This thesis contains the following research aspects:(1)Proposed to select Simics as the basic basis for the modeling platform of this topic by comparing and analyzing several digital modeling platforms,which from the aspects of simulation efficiency,compatibility and completeness,and further study some core mechanisms in Simics.(2)The key technologies such as synchronization technology and cross communication link technology in the redundancy management of dual-redundancy flight control computer digital model were studied,and the scheme of synchronization and cross communication link were designed based on the actual situation of the subject.(3)Through the research on the overall framework of the dual-redundancy flight control computer digital model,a dual processor model,a bridge model,a memory model,a discrete reception model,a watchdog model,a Debug1394 model,and a debug software interface model are built.And change the parallel port transmission in WinIO library to UDP transmission mode,complete the construction of the entire digital model.(4)Completed the test and verification of the dual-redundancy flight control computer digital model.First,functional unit tests are performed for each module to verify its completeness.After that,the digital model was put on the aircraft management system simulation verification platfrom and combine with related debugging software to perform integration testing,closed-loop testing,and performance testing on the entire model.This thesis designs and implements the dual-redundancy flight control computer digital model,and solves the limitations of real hardware in the development and debugging of on-board code and flight control software.Reduced design costs and simplified related operating environment.