共轴式无人直遥测自适应帧同步器及性能分析

Design and Implementation of Certain Self-Adapted Telemetry Frame Synchronizer

某共轴式双旋翼无人直升机 (简称无人直 )遥测帧同步器以EPROM完成帧同步图样的相关检测 ,以软件实现帧同步逻辑和各种控制 ,以FPGA构成外围电路 ,能够自动适应无人机在不同工作状态下传送不同帧长和不同格式的遥测数据 ,并能支持较高的码速率 (可达 4Mbps) .通过性能分析 ,优化设计了各种帧同步参数 .经过试飞 ,证明该遥测帧同步器性能良好 ,工作稳定 ,符合设计要求 .

This self-adapted telemetry frame synchronizer is designed for certain UAV, which telemetry-data frame-format is altering with different working modes. This frame synchronizer is controlled by software, so its parameters can be adjusted on real time to adapt various frame-formats. After that, EPROM is applied to achieve correlation-detect, and FPGA to form peripheral circuit. Through elaborate design, it can work on 4M bps. Based on performance analysis, the parameters of the synchronizer are optimized to meet the needs. Recent test-fly approve that it can work steadily and measure all design targets.