Dsp-based Onboard Computer Control System Design And Realization

In recent years, guided projectile has become to be a high-tech and low-cost weapon developed by many countries. As one of the core component of the satellite guided projectile, the projectile computer and control system with high performance, high precision,small size and low power consumption is the key technology for engineering realization. In this paper, with the research of Digital Signal Processor used in the projectile computer and control system, a hardware platform solution that based on a new DSP chip, TMS320C6747, was provided. And measuring the roll angle of the flying projectile with the coil type geomagnetic sensor was realized. The main work as follow:Firstly, with analyzing the requirements of the guided projectile towards the projectile computer and control system, the paper proposed a design plan that the DSP chip as the core processing unit and expound the main principles that guiding the system designing.Secondly, for measuring the flying projectile roll angle, some commonly used measuring methods were compared and the geomagnetic measurement was adopted. The conversion between the projectile body coordinate and geomagnetic coordinate was introduced in details, and the measurement circuits was designed.Thirdly, the paper systematically introduced the designing of the projectile computer hardware circuits based on the TMS320C6747 and the compiling of each module's driver. Most fuctions such as booting from NOR Flash after power on, acquiring the geomagnetic measurement parameters, serial communication, reading data from and writing data into the NAND Flash and outputting the igniting signal towards the impulse engine were realized.Finally, in this paper, circuits of the system were tested and each module was run with driver and debugged. The result show that the system hardware circuits designing was reasonable and the functions of these modules in the system were normal and valid.