Data Acquisition and Communication System of Miniature UAV Based on DSP

In order to meet the requirements of flight parameters high-speed, accurate data acquisition and reliable transmission of micro-UAV control and navigation system, this paper designed a data acquisition and transmission system based on the TMS320F2812 DSP. This system can conduct the digital signals acquisition, computation, and filtering, which are output from the GPS receiver and micro inertial measurement unit, and the data is sent to the ground station in the form of messages periodically. Using the model of a tightly coupled combination of navigation, an improved UKF algorithm, which introduce a square root filter into UKF(unscented kalman filter), was proposed to solve the problem of filter divergence under high dynamic conditions. Experiments show that the system hardware and software coordinate well and improved UKF tightly coupled navigation system has a better accuracy and stability under high dynamic.