Design Of Multi-channel Data Acquisition And Process System Based On DSP

Flight attitude measurement system working at high altitude and high-speed flight conditions, the system must be synchronized multi-channel flight data acquisition signal storage, data storage capacity, anti-environmental interference capability, and requires real time flight attitude measurements. Issue attitude measurement system for the needs of the flight of multi-channel data acquisition and processing system design, specific studies are as follows:First, according to flight attitude measurement system multi-channel acquisition and real-time requirements, the design of the 32-bit fixed point DSP chip as a core control chip 12-bit by 8 parallel sampling of the AD chip sensor array for multi-channel signal synchronous acquisition And the data acquisition digital filtering.Second, the DSP chip for the shortcomings of the data storage space is too small, the system of foreign expansion of a 64M NAND Flash memory, making the system can be applied to large-capacity long acquisition.Finally, the design of anti-jamming performance, taking into account the characteristics of flight parameter signal bandwidth, the choice of a narrow-band FIR digital filter design, digital filter to avoid the common problem of high order, saving a great extent the hardware Resources, reducing operation time data to effectively improve the system's real-time. The designed DSP-based multi-channel data acquisition and processing system acquisition and storage capabilities of its stability, filter works well, and in the design of DSP-based digital filtering algorithm, using MATLAB and CCS integrated development environment, making the system has great flexibility, according to the design of the practical application of the required fast filter, which is different flight attitude measurement System anti-jamming design brings flexibility.