The invention discloses an
avionics system suitable for a multi-purpose unmanned aircraft. A 1553B dual-redundancy
bus framework is adopted in the
avionics system. The
avionics system consists of a main processor unit, a universal interface unit, a 1553B
bus, a
mass memory, an airborne monitoring terminal, a task load, an execution mechanism and a sensor
assembly. The devices have the connection relationships that: the main processor unit, the universal interface unit, the
mass memory, the airborne monitoring terminal and the task load are connected with the 1553B
bus through a 1553B special electric connector, and the 1553B special electric connector serving as a bus module connects all the devices attached to the bus together; a steering engine controller is connected with the universalinterface unit through an RS422 interface; and the sensor
assembly is connected to the universal interface unit through interfaces of serial RS422 / RS232 / RS485, an ARINC429 bus, a CAN, analogue AD / DA and discrete DIO and the like. The avionics system has the characteristics of strong multi-task expandability, multi-redundancy high reliability, rich data interfaces and strong calculation and
processing capabilities, and can well meet the application requirement of 'one platform and multiple purposes' of the unmanned aircraft.