【摘要】 为满足导航系统设计的小型化、实时性要求,本文提出了一种基于FPGA+DSP的实现方案。该方案的设计思路是:将FPGA映射到DSPEMIF的一段地址空间,并用FPGA来完成多通道信号的采集;DSP根据接收到的数据完成导航解算并以总线(如CAN)形式输出给控制设备和外部测试设备。本文重点介绍了惯性测量单元、数据采集与接口电路和导航计算机等方面的硬件和软件设计;最后对已完成的试验样机进行全面性能测试,结果表明此设计可以达到预期的设计要求。更多还原

【Abstract】 According to the characteristic and application require of navigation computer,the navigation computer program is put forward based on DSP and FPGA.In the design of strap-down inertial navigation system,a FPGA + DSP is proposed in order to meet the requirements of integrated navigation system,including real-time,small size performance.FPGA(Field programmable gate array)is mapped into DSP memory space to complete data sampling of more channels.DSP has functions of navigation and sends out the results to control-equipment and test-equipment in the form of CAN_BUS.System hardware and software of strap-down inertial navigation system are designed from inertial measurement unit,data sampling,interface circuit to navigation computer.The experimental system was achieved,and the system static work has reached the anticipated designing requirement under the normal temperature.更多还原