基于微波调控的离子推力器数字反馈控制研究

Facing the multiple performance indicators of‘fast response，low noise，and high stability’pro⁃ posed by the space gravitational wave detection satellite platform for the micro thruster，it is difficult to meet the high-precision performance of the traditional open-loop propulsion system. Based on the miniature microwave ion thruster with the main characteristics of high thrust estimation accuracy and strong controllability，this paper adopts the microwave control strategy，and the precise feedback control method combining analog circuit and digi⁃ tal control technology to achieve 15ms fast response，10^-3~1Hz frequency band noise less than 0.1µN/Hz^1/2 thrust output index. The research shows that compared with open-loop regulation，feedback control can effectively sup⁃ press various noises and disturbances caused by device temperature drift and complex coupling operating charac⁃ teristics of thrusters，and the anti-aliasing filter scheme adopted in this paper can effectively suppress the folding of high-frequency data in the low and medium frequency bands during the digital control process，thus improving the thrust noise index.