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标题：微波成像仪高精度扫描控制算法的设计与仿真 |
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作者：许雄，王俊，黄潇嵘 |
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| 2016年第11期 访问次数：237次 |
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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‰。
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
Abstract: The domestic development of scan driving mechanism of microwave radiometer instrument, which is a scientific instrument flying on the Fengyun series meteorological satellite, is becoming more and more urgent. Its major problem and obstacle is how to achieve highpecision steadystate error of scan speed under the condition of superlow scan speed motion and large load inertia. In order to solve this problem, a scan controller based on the nonlinear trackingdifferentiator was therefore introduced and designed in this paper. This scan controller adopted the dualloop control structure with the speed loop and the current loop. And the feedback speed in the speed loop was realtime estimated by a twoorder trackingdifferentiator. Finally, a simulation platform for the microwave 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 highpecision steadystate error. For a low scan speed motion with the speed of 30 r/min, the steadystate velocity fluctuation errors are less than 0.2‰ even if the load torque is suddenly added in the simulations.
Key words: microwave radiometer instrument; scan driving controller; trackingdifferentiator; velocity fluctuation error
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