基于DSP的MSINS/GPS组合导航计算机设计

介绍了以DSP为核心的MSINS/GPS分布式控制组合导航计算机的设计方法。为降低系统成本，选用TI公司的DSP作为导航算法处理机，采用TL16C550和MAX3160设计了RS-232/485/422多协议串口，实现该系统与主机的通信。鉴于GPS－OEM板异步串口输出的
报文在接收时需要进行判断和校验，采用单片机单独控制接收，并将预处理数据存储到双口RAM中,节约CPU的时间。对于MSINS六路数据的采集，则采用CPLD作为调度机，将A/D转换结果也放于双端口RAM中。系统还采用GPS接收机输出的1PPS脉冲，结合CPLD产生的时序实现M SINS和GPS数据的同步采集。
关键词： MSINS；GPS；DSP；组合导航；同步
Abstract: The design method of distributing control navigation computer for MSINS/GPS
integrated system based on digital signal processor(DSP) have been introduced in this paper. To reduce the cost, DSP manufactured by Texas Instruments has been selected as navigation
algorithm processor. Multi-protocol UART RS-232/485/422 has been designed based on
TLC16C550 and MAX3160 to realize communication with host computer. As GPS OEM board’s output message from UART needing judge and verify, the system use single chip computer to receive the message and save the pretreatment data to dual-port static RAM to economize the time of CPU. Adopting complex programmable logic device(CPLD) to collect the 6 channels micro inertial measurement unit data, the A/D conversion values have been placed in RAM. Using the 1PPS signal from GPS receiver and combining the time sequence produced by CPLD, the system realizes synchronal data collection to MSINS and GPS.
Key words: MSINS；GPS； DSP；Integrated Navigation System；Synchronization；