Design And Implemention Of UAV Flight Control Computer Core System Based On Dual DSC

As the core of the UAV flight control system, the fight control computer is the key issue in UAV development. Presently, research in this area has not been so perfect,especially some core boards are still dependent on imports.This paper designed a UAV flight control computer core system based on dual TMS320F28335 architecture with full independent intellectual property rights, and explored a new implementation for the hardware design of the UAV flight control computer.Firstly, the paper analyzed the interfaces between flight control computer and airborne equipments by studying the basic frame of the UAV flight control system, and then defined the hardware framework of flight control computer as core system and peripheral interfaces. The core system is mainly discussed in this paper.According to the principles of small size,highly cost effective and commonality,the design requirements and design proposal are given in detail.Secondly, the core system is endowed with powerful computing capabilities by the application of dual TMS320F28335 architecture.Through the rationally planning of the dual core on-chip peripheral resources, the core system has provided the UAV fight control system with most of the interface resources, including 32 analog input (A/D) channels for analog signal acquisition; 12 PWM output channels and 6 CAP channels for mini digital servo feed-back control; 40 configured GPIO channels for airborne discrete devices; 4 UART for airborne serial devices; 8 analog output (D/A) channels and 8 UARTs are added in order to drive the traditional analog servo and interface as much as 12 serial devices.Thirdly, the framework is more modifiable via the independent board function partition and the stack symbol integrated circuit board improves the space utilization and meets the requirements of miniaturization.Finally, by the debugging of single core board, the design scheme of all function modules are fully tested, and then the dual core Prototype is finished. The system integration tests have guaranteed the performance quality of the muti-interfaces; through applying this core system as the hardware platform of Micro UAV attitude determination system, which has finished the test of the practical engineering project and proved that this core system for UAV flight control computer has certain practical usefulness.