光电跟踪与测量技术研究室知识库

Focusing on the high-definition dynamic imaging requirements of space targets, based on the space two-dimensional turntable equipped with optical equipment, aiming at the image blur caused by speed fluctuation in a single exposure time, this paper focuses on the action mechanism of cable winding torque nonlinearity, torque fluctuation in brushless DC motor control, precision loss caused by speed measurement feedback error, so as to break through the optimal control strategy of turntable speed stationarity under large rotation range and strong coupling torque disturbance [1-3]. The problems are solved by the systematic strategies, such as cable bundle management, precision machining and assembly, high-precision speed feedback, torque compensation in commutation section of Brushless DC motor, target motion trajectory fitting and prediction method. Finally, the simulation realizes azimuth axis speed stability as 0.002°/s(σ) and pitch axis speed stability as 0.0016°/s(σ)[4]. The technology can be applied to the control field with high speed stability of optoelectric turntable or other moving mechanisms[5]. © 2022 IEEE.