Design And Implementation Of A General Signal Processing Unit For Integrated Avionics Systems

With rapid development of digital and micro-electronics technologies,avionics system is moving forward into directions of modularity,’functionalization and integration,etc.What’s more,multiplied increase of data inside integrated avionics systems requires higher bandwidth,lower time delay and better expansibility of data transmission network.As the core constituent part of a integrated avionics system,signal processing unit also encounters the aforementioned challenges.Based on design concepts of modularity,universalization,standardization and integration,this essay aims to conduct research on general signal processing unit by starting with key technologies like high-speed serial transmission bus and reconfigurable software,etc.This essay first introduces current situation of international and domestic avionics systems and development history of high-speed transmission bus technology.Then with focuses on requirements of the design task,a new generation of general signal processing unit for integrated avionics system is constructed based on RapidIO interconnected network,according to development trends of such systems.This essay focuses on introduction of architecture of the design,as well as design and realization of each functional module.Based on research of RapidIO protocols,RapidIO high-speed serial buses are adopted to realize interconnection of such systems.Compared with data buses of conventional avionics systems,the system in question excels with advantages such as higher bandwidth,lower time delay,higher reliability and more flexible topology structure.At last,this essay introduces verification tests conducted for each functional module of the general signal processing unit.The test results indicate this unit can achieve intended design purpose.The general signal processing unit designed in this paper can provide feasibility for the development and fabrication department to supply national military industry with a new generation of avionics systems with advanced functions,flexible control,stable operation and convenient repair,therefore the unit is of high value.