Simple Fpga-based Unmanned Aircraft Air Data Systems Research

Pilotless aircraft is increasing used in today's war-detect because of its flexibility. This paper introduces the principle of atmosphere data measurement system in pilotless aircraft, discusses the practical total project, uses FPGA die as the system carrier and introduced in detail the module design in external die in system level. Partition the modules according to different functions in practical design and design the modules in the measurement system respectively.There are many atmosphere parameters. The air pressure altitude is a very important parameter in its flight, which is the key point to fulfill the assignment. Usually pilotless aircraft altitude is measured indirectly by measuring static air pressure. This paper focuses on the air pressure measurement system and discusses the structures in the air pressure Hp measurement system and the relations between the modules of the system. After finishing the modeling of all the modules, implementation Verilog HDL coding according to ASMD, simulate all the modules with testbench and analysis the simulation result. The total system passes the function simulation and verification and the character of real time meets the requirements of the system design.The frequency from the front sensor is within 5k to 10k Hz in the air pressure altitude measurement in the paper. So it is convenient to implement the different frequency measurement by updating the length of the corresponding registers. If FPGA die with higher frequency of standard clock is used, it can accelerate the measurement speed with the same frequency measurement precision. Compared with microcomputer, FPGA is more anti-jamming and stable in its implementation.