A Controller Design for Precision Laser-Beam Positioning System

This article presents a decentralized control strategy for a two-axis precision laser-beam positioning system (PLPS). The PLPS is composed of two integrated subsystems: the telescope system equipped with a FSM platform and the beam alignment system. The strategy included actual data acquisition, system analysis and modeling, digital controller design, and experimental evaluations. The controller had a sensitivity margin of less than −10 dB at 20 Hz on each axis, and maintained the stability of PLPS. The system had moderate robustness, tracked the command signals and output responses without steady-state errors.

[1]  Karl Johan Åström,et al.  Computer-Controlled Systems: Theory and Design , 1984 .

[2]  P. J. Campo,et al.  Achievable closed-loop properties of systems under decentralized control: conditions involving the steady-state gain , 1994, IEEE Trans. Autom. Control..

[3]  H. H. Rosenbrock,et al.  Computer Aided Control System Design , 1974, IEEE Transactions on Systems, Man, and Cybernetics.

[4]  Shankar P. Bhattacharyya,et al.  Transient response control via characteristic ratio assignment , 2003, IEEE Trans. Autom. Control..

[5]  I. D. Landau,et al.  Digital Control Systems: Design, Identification and Implementation , 2006 .

[6]  Josef Shwartz,et al.  Tactical high-energy laser , 2002, SPIE LASE.

[7]  B. Anderson,et al.  Digital control of dynamic systems , 1981, IEEE Transactions on Acoustics, Speech, and Signal Processing.

[8]  Victor A. Skormin,et al.  Model reference control of a fast steering mirror of a pointing, acquisition and tracking system for laser communications , 1995, Proceedings of the IEEE 1995 National Aerospace and Electronics Conference. NAECON 1995.

[9]  Michael N. Sweeney,et al.  Design considerations for fast-steering mirrors (FSMs) , 2002, SPIE Optics + Photonics.

[10]  Chi-Tsong Chen,et al.  Analog and Digital Control System Design: Transfer-Function, State-Space, and Algebraic Methods , 1993 .

[11]  F. G. Shinskey,et al.  Controlling Multivariable Processes , 1981 .

[12]  I. D. Landau,et al.  Digital Control Systems: Design, Identification and Implementation (Communications and Control Engineering) , 2006 .

[13]  Pawel K. Orzechowski,et al.  Nonlinear adaptive control of optical jitter with a new liquid crystal beam steering device , 2008, 2008 American Control Conference.

[14]  Li Hua Jin,et al.  Fixed, Low-Order Controller Design with Time Response Specifications Using Non-Convex Optimization , 2007, 2007 American Control Conference.

[15]  Tao Tang,et al.  Simulation of the fast steering mirror control system based on gyro velocity feedback , 2009, International Conference on Optical Instruments and Technology.

[16]  Dapeng Fan,et al.  Design and Analysis of a Fast Steering Mirror for Precision Laser Beams Steering , 2009 .

[17]  S. P. Bhattacharyya,et al.  Computer aided control system design: Multiple design objectives , 2007, 2007 European Control Conference (ECC).

[18]  A. Lipatov.  Some sufficient conditions for stability and instability of continuous linear stationary systems , 1979 .

[19]  E. Bristol.  On a new measure of interaction for multivariable process control , 1966 .

[20]  Tsu-Chin Tsao,et al.  Optimal Suppression of Laser Beam Jitter by High-Order RLS Adaptive Control , 2008, IEEE Transactions on Control Systems Technology.