Turntable' s precision has a tremendous impact on the tracking accuracy of the optoelectronic track-ing system. Taking the azimuth axis into account, the control strategy is 3-loop structure, including current loop, speed loop and position loop. Then the design method is presented. Because of the nonlinear effect of the friction moment, the turntable' s accuracy is affected, so the feedforward controller to compensate the effect of friction moment is designed. Finally some tracking results are presented.%转台精度直接影响整个光电跟踪系统的跟踪精度.以光电跟踪系统的方位轴为例,采用电流环、速度环、位置环三环控制算法实现控制.介绍了三环控制算法的分析与设计方法,并针对实际工程中出现的非线性摩擦力矩影响跟踪精度的问题,采用前馈补偿的方法提高精度,并给出了仿真实验结果.
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