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首页> 外文期刊>Optical engineering >Compensating for some errors related to time delay in a charge-coupled-device-based fast steering mirror control system using a feedforward loop Tao Tang
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Compensating for some errors related to time delay in a charge-coupled-device-based fast steering mirror control system using a feedforward loop Tao Tang

机译：使用前馈回路补偿基于电荷耦合器件的快速转向镜控制系统中与时间延迟有关的一些误差陶堂，Tao Tang

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摘要

In many control systems, the most effective method to improve the performance of the closed-loop system is by enhancing the gain of the control system, which results in a wide control bandwidth. However, in the control system of a charge-coupled-device-based tracking loop for a fast steering mirror, the bandwidth of the closed loop is greatly limited by the large time delay of the TV tracker. Additionally, the time delay leads to instability of the system when the closed-loop system has high gain. We propose a new feedforward control to compensate some errors related to the time delay of the tracker, meanwhile improving the performance of the closed-loop fast steering mirror system. The control structure we propose includes two closed loops; a tracking loop and a fast position loop. The fast position loop is produced using an eddy current sensor, and the tracking loop is the outer loop, enveloping the fast position loop. The feedforward signal is estimated from the signal of the eddy current sensor and the TV tracker, which is added to the input of the fast position loop. Experimental results show that our proposed feedforward system can effectively enhance trajectory tracking and pointing performance.
机译：在许多控制系统中，提高闭环系统性能的最有效方法是提高控制系统的增益，从而获得较宽的控制带宽。但是，在用于快速转向镜的基于电荷耦合器件的跟踪环路的控制系统中，闭环的带宽受到电视跟踪器较大的时延的限制。另外，当闭环系统具有高增益时，时间延迟会导致系统不稳定。我们提出了一种新的前馈控制，以补偿与跟踪器的时间延迟有关的一些误差，同时提高闭环快速转向镜系统的性能。我们建议的控制结构包括两个闭环。跟踪环和快速位置环。快速位置回路是使用涡流传感器产生的，跟踪回路是外部回路，包裹着快速位置回路。前馈信号是根据涡流传感器和电视跟踪器的信号估算的，该信号被添加到快速位置环的输入中。实验结果表明，我们提出的前馈系统可以有效地增强轨迹跟踪和指向性能。

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