Disturbance Rejection by Optimal Feedback Control in a Laser Beam Steering System
Disturbance Rejection by Optimal Feedback Control in a Laser Beam Steering System
复制标题
激光束转向系统中通过最佳反馈控制进行干扰抑制
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
T. Tsao
中科院分区：
文献类型：
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作者：
Pawel K. Orzechowski;S. Gibson;T. Tsao
本文提出了一种激光蒸汽转向系统的指向和抗干扰的最优控制设计和实验实现。设计并实现了线性二次型高斯（LQG）控制器，该控制器包括随机扰动模型和积分作用，用于补偿由于光路中大气湍流和激光器及光学元件机械振动引起的扰动。控制设计还考虑了施加到两个光束轴上的随机扰动相关的情况，并呈现多输入多输出（2 × 2）输出反馈控制器。该实验系统由一个双轴倾斜镜驱动的压电致动器控制的激光束，第二致动倾斜镜产生的干扰，一个位置传感装置，感测的光束在目标平面上的位置，和一个数字控制的真实的时间计算机。系统识别被用于确定波束操纵系统的状态空间模型以用于控制系统设计。实验结果证明了LQG最优扰动抑制对给定随机扰动的有效性。© 2004 ASME
This paper presents an optimal control design and experimental implementation for pointing and disturbance rejection in a laser steam steering system. The linear quadratic Gaussian (LQG) controller, which includes a stochastic disturbance model, as well as integral action, was designed and implemented to compensate for disturbances due to atmospheric turbulence in the optical path and mechanical vibration of the laser and optical components. The control design also considers the situation where the stochastic disturbances applied to the two beam axes are correlated and renders a multi-input-multi-output (2-by-2) output feedback controller. The experimental system consists of a two-axis tilt mirror driven by piezo-electric actuators for controlling the laser beam, a second actuated tilt mirror to generate disturbances, a position sensing device that senses the location of the beam on a target plane, and a real time computer for digital control. System identification is used to determine a state space model of the beam steering system for use in control system design. Experimental results are presented to demonstrate the effectiveness of the LQG optimal disturbance rejection for the prescribed stochastic disturbances.© 2004 ASME