小型一体化编码式太阳敏感器信号处理技术

为实现编码式太阳敏感器小型一体化设计，研究编码式太阳敏感器细分角度计算的坐标旋转数字计算机（CORDIC，coordinate rotation digital computer）算法，在FPGA中实现包括数据采集、角度计算、通信协议等全部敏感器数字信号处理功能，并在此基础上研制专用ASIC芯片.采用挠性连接技术完成整机的微型化组装，最终实现了整机质量0.5 kg、功耗0.5 W、测角精度 0.05°(3σ)、分辨率14″、数据刷新率40 Hz的设计指标.采用单片FPGA实现的编码式太阳敏感器信号处理电路体积小、精度高，是实现产品小型化设计的关键环节.

The Signal Processing Technique for Integrative Encoded Sun Sensor

To solve the key problem in the design of miniature integrative encoded sun sensor, FPGA is used instead of the 80C31 microprocessor system. To calculate the angle in FPGA, CORDIC algorithm of fine code is studied. Almost all the functions of signal processing of sun sensor are realized in FPGA, including multiplexer and AD controlling, data collecting, angle calculating and UART. Flexibility board is also used to connect the analog board and digital board so as to realize the miniature assembling. The performance of the miniature integrative coded sun sensor is listed as the following: mass 0.5 kg, power consumption 0.5 W,accuracy 0.05°(3σ), resolution 14″, update rate 40 Hz.