微波成像仪高精度扫描控制算法的设计与仿真  

Design and Simulation of High-precision Scan Control Algorithm for Micro-wave Radiometer Instrument

作　　者：许雄 王俊 黄潇嵘 

机构地区：[1]上海宇航系统工程研究所,上海201109

出　　处：《微电机》2016年第11期72-75,85,共5页Micromotors

基　　金：上海市青年科技英才扬帆计划项目"超高精度微波成像仪扫描运动系统与控制算法研究"(14YF1414200)

摘　　要：风云系列气象卫星微波成像仪的扫描驱动装置的国产化研制迫在眉睫,其研究难点为低速度、大惯量条件下实现超高精度的扫描速度稳定度问题。本文针对此问题,提出一种基于非线性跟踪-微分器的扫描控制器。该控制器采用速度环加电流环的双闭环控制架构,而速度环中的速度反馈采用二阶非线性跟踪-微分器实时估计得到。最后,通过搭建仿真平台并设计仿真实验,验证了该算法可以实现超高精度的扫描控制:对于0.5r/s的低速扫描运动,即使正向或负向突加转矩0.3Nm,稳态时速度波动误差均小于0.2‰。The domestic development of scan driving mechanism of micro-wave radiometer instrument, which is a scientific instrument flying on the Fengyun series meteorological satellite, is becoming more and more ur- gent. Its major problem and obstacle is how to achieve high-pecision steady-state error of scan speed under the condition of super-low scan speed motion and large load inertia. In order to solve this problem, a scan controller based on the non-linear tracking-differentiator was therefore introduced and designed in this paper. This scan controller adopted the dual-loop control structure with the speed loop and the current loop. And the feedback speed in the speed loop was real-time estimated by a two-order tracking-differentiator. Finally, a simulation platform for the micro-wave radiometer instrument was built to verify the scan control performance of the proposed algorithm. And the simulation results show that the designed scan controller can achieve high-pecision steady-state error. For a low scan speed motion with the speed of 30 r/min, the steady-state velocity fluctuation errors are less than 0. 2%. even if the load torque is suddenly added in the simulations.

关 键 词：微波成像仪 扫描驱动控制器 跟踪-微分器 速度波动误差 

分 类 号：TM301.2[电气工程—电机] TP273[自动化与计算机技术—检测技术与自动化装置]