Optimal disturbance rejection by LTI feedback control in a laser beam steering system

2004 ◽  
Author(s):  
P.K. Orzechowski ◽  
J.S. Gibson ◽  
Tsu-Chin Tsao
Keyword(s):  
Feedback Control ◽  
Laser Beam ◽  
Disturbance Rejection ◽  
Beam Steering ◽  
Steering System

Disturbance Rejection by Optimal Feedback Control in a Laser Beam Steering System

2004 ◽  
Author(s):  
Pawel K. Orzechowski ◽  
Steve Gibson ◽  
Tsu-Chin Tsao
Keyword(s):  
Control System ◽  
Laser Beam ◽  
Disturbance Rejection ◽  
Beam Steering ◽  
Control Design ◽  
Steering System ◽  
Optimal Feedback Control ◽  
Stochastic Disturbances ◽  
Linear Quadratic ◽  
Position Sensing

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.

scholarly journals Active Disturbance Rejection Control Based Feedback Control System for Quasi-Continuous-Wave Laser Beam Pointing Stabilization

2021 ◽  
Vol 2112 (1) ◽  
pp. 012016
Author(s):  
Wenjun Li ◽  
Lin Zhang ◽  
Yading Guo ◽  
Zhongzheng Chen ◽  
Chongfeng Shao ◽  
...  
Keyword(s):  
Control System ◽  
Feedback Control ◽  
Laser Beam ◽  
Lead Zirconate Titanate ◽  
Disturbance Rejection ◽  
Continuous Wave ◽  
Active Disturbance Rejection Control ◽  
Feedback Control System ◽  
Active Disturbance Rejection ◽  
Disturbance Rejection Control

Abstract Because of the significant nonlinearity of fast steering mirror (FSM), which is actuated by lead zirconate titanate (PZT) stacks, designing a high-performance laser beam pointing stabilization system is always a difficult work. This paper reports an active disturbance rejection control (ADRC) based feedback control system for laser beam pointing stabilization of a high-power quasi-continuous-wave (QCW) Nd:YAG slab laser with a repetition frequency of 160 Hz and an average output power of 1.5 kW. The simulation and experiment show that the ADRC is faster and smoother than traditional proportional-integral-differential (PID) control, and the ADRC can effectively reduce overshoot in the laser beam pointing stabilization process.

Note: High capacity digital laser beam steering system

2011 ◽  
Vol 82 (11) ◽  
pp. 116101 ◽  
Author(s):  
D. Hebert ◽  
P. Cantu ◽  
C. Washington ◽  
O. Ajala ◽  
M. Feldman
Keyword(s):  
Laser Beam ◽  
Beam Steering ◽  
High Capacity ◽  
Steering System

Model reference control of a laser beam steering system for laser communication applications

2001 ◽  
Author(s):  
Mounir Bouzoubaa ◽  
Vladimir V. Nikulin ◽  
Victor A. Skormin ◽  
Timothy E. Busch
Keyword(s):  
Laser Beam ◽  
Beam Steering ◽  
Steering System ◽  
Laser Communication ◽  
Model Reference ◽  
Model Reference Control

Control of a Flexible Continuum Manipulator for Laser Beam Steering

2021 ◽  
Vol 6 (2) ◽  
pp. 1074-1081
Author(s):  
Hangjie Mo ◽  
Ruofeng Wei ◽  
Bo Ouyang ◽  
Liuxi Xing ◽  
Yanhu Shan ◽  
...  
Keyword(s):  
Laser Beam ◽  
Beam Steering ◽  
Continuum Manipulator

Pointing error analysis of Risley-prism-based beam steering system

2014 ◽  
Vol 53 (25) ◽  
pp. 5775 ◽  
Author(s):  
Yuan Zhou ◽  
Yafei Lu ◽  
Mo Hei ◽  
Guangcan Liu ◽  
Dapeng Fan
Keyword(s):  
Error Analysis ◽  
Beam Steering ◽  
Steering System ◽  
Pointing Error
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