The Space Acquisition System Based On Anti-fuse FPGA For Mechanical Parameters

The space acquisition system based on anti-fuse FPGA for mechanical parameters studied in the dissertation is applied to the telemetry system of aircraft. The task of the system is to sample in real time and transmit the parameters of the aircraft concerning vibration, shock and noise to the memory.The system is composed of acquisition device and ground testing platform. The former one is used to sample and edit data, and it is made up of signal adjusting module, A/D converter, FPGA controller and LVDS interface. The ground testing platform is mainly used to send commands of starting or shutting etc. It also achieves some functions such as providing 50 channels analog signal and testing automatically online and reading data after being reclaimed. The ground testing platform consists of four cards, including power board, USB reading card, analog signal generating card, online reading card.Firstly, this paper introduces the development status of the data gathering and coding equipment at home and abroad, points out the gaps that the domestic data gathering and coding equipment relative to foreign device, and gives a brief introduction of the anti-fuse FPGA. Secondly, the outline of the system is given on the basis of the system technical requirement. There is also a discussion about the hardware circuit of the gathering and coding module, the data frame format and power module and so on. At the same time, the function of the ground testing platform and principle of each card are described in detail. In addition, this paper pays more attention to the application and development of the anti-fuse FPGA and gives the various optimizations that the anti-fuse FPGA has brought to the system. There is also a study on its sequential circuit design and how to control its clock. Finally, the paper presents the design method in terms of reliability, including electromagnetic compatibility, heat dissipation, and radiation resistance.It is proved by latter experiments that the space mechanical parameters acquisition system can achieve the real-time collection and transmission of 50 channels signal including high and low frequency vibration, shock and noise etc. Moreover, it meets the demands in terms of accuracy and reliability.