Design and Implementation of FPGA-Based Interferometer Control System for Satellite-Borne Spectrometer

As satellite-borne spectrometers are more and more widely used due to their capability of obtaining sub-nanometer spectral resolution, higher speed stability of the control system is greatly valued. Compared with the traditional microprocessor-based control system, this system excels in low delay control, high reliability, and simple structure. The paper highlights the interferometer control system's software structure and implementation of position information solving and speed information solving. The article optimizes the speed measurement by combining timed angle measurements and fixed angle time measurements to improve speed stability. The experimental results show that the interferometer control system is able to realize velocity stability of 99% at low rates.